{"id":6412,"date":"2023-09-15T08:25:46","date_gmt":"2023-09-15T08:25:46","guid":{"rendered":"https:\/\/topviecit.vn\/blog\/?p=6412"},"modified":"2023-09-20T04:06:45","modified_gmt":"2023-09-20T04:06:45","slug":"cau-hoi-phong-van-data-engineer","status":"publish","type":"post","link":"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/","title":{"rendered":"Tr\u1ecdn b\u1ed9 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer m\u1edbi nh\u1ea5t k\u00e8m c\u00e2u tr\u1ea3 l\u1eddi"},"content":{"rendered":"\n<p>\u0110\u1ec3 v\u01b0\u1ee3t qua v\u00f2ng ph\u1ecfng v\u1ea5n cho v\u1ecb tr\u00ed Data Engineer, b\u1ea1n c\u1ea7n chu\u1ea9n b\u1ecb k\u1ef9 l\u01b0\u1ee1ng. V\u1eady, nh\u00e0 tuy\u1ec3n d\u1ee5ng s\u1ebd s\u1eed d\u1ee5ng nh\u1eefng <strong>c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer<\/strong> n\u00e0o? H\u00e3y c\u00f9ng <a href=\"https:\/\/topviecit.vn\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>TopviecIT.vn<\/strong><\/a> t\u00ecm hi\u1ec3u nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer m\u1edbi nh\u1ea5t hi\u1ec7n nay k\u00e8m c\u00e2u tr\u1ea3 l\u1eddi trong b\u00e0i vi\u1ebft thu\u1ed9c chuy\u00ean m\u1ee5c <a href=\"https:\/\/topviecit.vn\/blog\/chuyen-muc\/chia-se-kinh-nghiem\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Chia s\u1ebb kinh nghi\u1ec7m<\/strong><\/a> chi ti\u1ebft ng\u00e0y h\u00f4m nay.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_63 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Nhom_cau_hoi_phong_van_Data_Engineer_co_ban\" title=\"Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer c\u01a1 b\u1ea3n\">Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer c\u01a1 b\u1ea3n<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_1_Ky_thuat_du_lieu_la_gi\" title=\"C\u00e2u 1: K\u1ef9 thu\u1eadt d\u1eef li\u1ec7u l\u00e0 g\u00ec?\">C\u00e2u 1: K\u1ef9 thu\u1eadt d\u1eef li\u1ec7u l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_2_Khai_niem_mo_hinh_hoa_du_lieu\" title=\"C\u00e2u 2: Kh\u00e1i ni\u1ec7m m\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u?\">C\u00e2u 2: Kh\u00e1i ni\u1ec7m m\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_3_Neu_mot_so_luoc_do_thiet_ke_khi_lap_mo_hinh_du_lieu\" title=\"C\u00e2u 3: N\u00eau m\u1ed9t s\u1ed1 l\u01b0\u1ee3c \u0111\u1ed3 thi\u1ebft k\u1ebf khi l\u1eadp m\u00f4 h\u00ecnh d\u1eef li\u1ec7u\">C\u00e2u 3: N\u00eau m\u1ed9t s\u1ed1 l\u01b0\u1ee3c \u0111\u1ed3 thi\u1ebft k\u1ebf khi l\u1eadp m\u00f4 h\u00ecnh d\u1eef li\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_4_Su_khac_nhau_cua_du_lieu_co_cau_truc_va_khong_cau_truc\" title=\"C\u00e2u 4: S\u1ef1 kh\u00e1c nhau c\u1ee7a d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac v\u00e0 kh\u00f4ng c\u1ea5u tr\u00fac\">C\u00e2u 4: S\u1ef1 kh\u00e1c nhau c\u1ee7a d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac v\u00e0 kh\u00f4ng c\u1ea5u tr\u00fac<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_5_Giai_thich_ngan_gon_ve_Hadoop\" title=\"C\u00e2u 5: Gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn v\u1ec1 Hadoop\">C\u00e2u 5: Gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn v\u1ec1 Hadoop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_6_NameNode_trong_HDFS_la_gi\" title=\"C\u00e2u 6: NameNode trong HDFS l\u00e0 g\u00ec?\">C\u00e2u 6: NameNode trong HDFS l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_7_Trong_Big_Data_4_V_la_gi\" title=\"C\u00e2u 7: Trong Big Data, 4 V l\u00e0 g\u00ec?\">C\u00e2u 7: Trong Big Data, 4 V l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_8_Trinh_quet_khoi_va_khoi_trong_HDFS_la_gi\" title=\"C\u00e2u 8: Tr\u00ecnh qu\u00e9t kh\u1ed1i v\u00e0 kh\u1ed1i trong HDFS l\u00e0 g\u00ec?\">C\u00e2u 8: Tr\u00ecnh qu\u00e9t kh\u1ed1i v\u00e0 kh\u1ed1i trong HDFS l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_9_Giai_thich_ngan_gon_ve_Snowflake\" title=\"C\u00e2u 9: Gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn v\u1ec1 Snowflake?\">C\u00e2u 9: Gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn v\u1ec1 Snowflake?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_10_Star_Schema_la_gi\" title=\"C\u00e2u 10: Star Schema l\u00e0 g\u00ec?\">C\u00e2u 10: Star Schema l\u00e0 g\u00ec?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Nhom_cau_hoi_phong_van_Data_Engineer_trung_cap\" title=\"Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer trung c\u1ea5p\">Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer trung c\u1ea5p<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_11_Mot_so_phuong_phap_cua_Reducer_la_gi\" title=\"C\u00e2u 11: M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a Reducer l\u00e0 g\u00ec?\">C\u00e2u 11: M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a Reducer l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_12_Neu_cac_che_do_khac_nhau_cua_Hadoop\" title=\"C\u00e2u 12: N\u00eau c\u00e1c ch\u1ebf \u0111\u1ed9 kh\u00e1c nhau c\u1ee7a Hadoop\">C\u00e2u 12: N\u00eau c\u00e1c ch\u1ebf \u0111\u1ed9 kh\u00e1c nhau c\u1ee7a Hadoop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_13_Bao_mat_du_lieu_duoc_dam_bao_trong_Hadoop\" title=\"C\u00e2u 13: B\u1ea3o m\u1eadt d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o trong Hadoop\">C\u00e2u 13: B\u1ea3o m\u1eadt d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o trong Hadoop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_14_So_cong_mac_dinh_cho_Port_Tracker_Task_Tracker_va_NameNode_trong_Hadoop_la_gi\" title=\"C\u00e2u 14: S\u1ed1 c\u1ed5ng m\u1eb7c \u0111\u1ecbnh cho Port Tracker, Task Tracker v\u00e0 NameNode trong Hadoop l\u00e0 g\u00ec?\">C\u00e2u 14: S\u1ed1 c\u1ed5ng m\u1eb7c \u0111\u1ecbnh cho Port Tracker, Task Tracker v\u00e0 NameNode trong Hadoop l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_15_Big_Data_Analytics_tac_dong_den_doanh_thu_nhu_the_nao\" title=\"C\u00e2u 15: Big Data Analytics t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn doanh thu nh\u01b0 th\u1ebf n\u00e0o?\">C\u00e2u 15: Big Data Analytics t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn doanh thu nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_16_Du_lieu_duoc_luu_tru_trong_NameNode_la_gi\" title=\"C\u00e2u 16: D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong NameNode l\u00e0 g\u00ec?\">C\u00e2u 16: D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong NameNode l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_17_Cong_dung_cua_Metastore_trong_Hive_la_gi\" title=\"C\u00e2u 17: C\u00f4ng d\u1ee5ng c\u1ee7a Metastore trong Hive l\u00e0 g\u00ec?\">C\u00e2u 17: C\u00f4ng d\u1ee5ng c\u1ee7a Metastore trong Hive l\u00e0 g\u00ec?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Nhom_cau_hoi_phong_van_Data_Engineer_nang_cao\" title=\"Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e2ng cao\">Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e2ng cao<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_18_Trong_mo_hinh_du_lieu_Hive_cac_thanh_phan_co_san_la_gi\" title=\"C\u00e2u 18: Trong m\u00f4 h\u00ecnh d\u1eef li\u1ec7u Hive, c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 s\u1eb5n l\u00e0 g\u00ec?\">C\u00e2u 18: Trong m\u00f4 h\u00ecnh d\u1eef li\u1ec7u Hive, c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 s\u1eb5n l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_19_Co_the_tao_bao_nhieu_bang_cho_mot_tep_du_lieu_rieng_le\" title=\"C\u00e2u 19: C\u00f3 th\u1ec3 t\u1ea1o bao nhi\u00eau b\u1ea3ng cho m\u1ed9t t\u1ec7p d\u1eef li\u1ec7u ri\u00eang l\u1ebb?\">C\u00e2u 19: C\u00f3 th\u1ec3 t\u1ea1o bao nhi\u00eau b\u1ea3ng cho m\u1ed9t t\u1ec7p d\u1eef li\u1ec7u ri\u00eang l\u1ebb?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_20_Bang_Skewed_trong_Hive_co_y_nghia_gi\" title=\"C\u00e2u 20: B\u1ea3ng Skewed trong Hive c\u00f3 \u00fd ngh\u0129a g\u00ec?\">C\u00e2u 20: B\u1ea3ng Skewed trong Hive c\u00f3 \u00fd ngh\u0129a g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_21_Cac_bo_suu_tap_co_trong_Hive_la_gi\" title=\"C\u00e2u 21: C\u00e1c b\u1ed9 s\u01b0u t\u1eadp c\u00f3 trong Hive l\u00e0 g\u00ec?\">C\u00e2u 21: C\u00e1c b\u1ed9 s\u01b0u t\u1eadp c\u00f3 trong Hive l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_22_Trong_Hive_SerDe_la_gi\" title=\"C\u00e2u 22: Trong Hive, SerDe l\u00e0 g\u00ec?\">C\u00e2u 22: Trong Hive, SerDe l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_23_Data_Warehouse_va_Database_khac_nhau_nhu_the_nao\" title=\"C\u00e2u 23: Data Warehouse v\u00e0 Database kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?\">C\u00e2u 23: Data Warehouse v\u00e0 Database kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_24_Vai_tro_cua_tep_hiverc_trong_Hive_la_gi\" title=\"C\u00e2u 24: Vai tr\u00f2 c\u1ee7a t\u1ec7p .hiverc trong Hive l\u00e0 g\u00ec?\">C\u00e2u 24: Vai tr\u00f2 c\u1ee7a t\u1ec7p .hiverc trong Hive l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_25_args_va_kwargs_dung_de_lam_gi\" title=\"C\u00e2u 25: *args v\u00e0 **kwargs d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?\">C\u00e2u 25: *args v\u00e0 **kwargs d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-data-engineer\/#Cau_26_Cach_de_xem_cau_truc_cua_co_so_du_lieu_bang_MySQL_la_gi\" title=\"C\u00e2u 26: C\u00e1ch \u0111\u1ec3 xem c\u1ea5u tr\u00fac c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng MySQL l\u00e0 g\u00ec?\">C\u00e2u 26: C\u00e1ch \u0111\u1ec3 xem c\u1ea5u tr\u00fac c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng MySQL l\u00e0 g\u00ec?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nhom_cau_hoi_phong_van_Data_Engineer_co_ban\"><\/span><strong>Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer c\u01a1 b\u1ea3n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n <strong><a href=\"https:\/\/topviecit.vn\/blog\/data-engineer-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Data Engineer<\/a><\/strong> th\u01b0\u1eddng s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c \u1ee9ng vi\u00ean c\u00f3 \u00edt n\u0103m kinh nghi\u1ec7m, khi nh\u00e0 tuy\u1ec3n d\u1ee5ng c\u1ea7n t\u00ecm ki\u1ebfm Intern Data Engineer cho doanh nghi\u1ec7p. B\u00ean c\u1ea1nh \u0111\u00f3, nh\u00e0 tuy\u1ec3n d\u1ee5ng c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e0y \u0111\u1ec3 b\u1eaft \u0111\u1ea7u cho bu\u1ed5i ph\u1ecfng v\u1ea5n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_1_Ky_thuat_du_lieu_la_gi\"><\/span><strong>C\u00e2u 1: K\u1ef9 thu\u1eadt d\u1eef li\u1ec7u l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>K\u1ef9 thu\u1eadt d\u1eef li\u1ec7u l\u00e0 t\u1eadp h\u1ee3p c\u00e1c c\u00f4ng c\u1ee5, ph\u01b0\u01a1ng ph\u00e1p v\u00e0 quy tr\u00ecnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1eed l\u00fd, l\u01b0u tr\u1eef, v\u00e0 truy xu\u1ea5t d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c t\u1ea1o v\u00e0 duy tr\u00ec <a href=\"https:\/\/topviecit.vn\/blog\/co-so-du-lieu-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong><\/a>, x\u00e2y d\u1ef1ng c\u00e1c \u1ed1ng d\u1eabn d\u1eef li\u1ec7u (data pipelines), th\u1ef1c hi\u1ec7n ETL (Extract, Transform, Load), v\u00e0 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch d\u1eef li\u1ec7u \u0111\u1ec3 tr\u00edch xu\u1ea5t th\u00f4ng tin h\u1eefu \u00edch t\u1eeb d\u1eef li\u1ec7u. K\u1ef9 thu\u1eadt d\u1eef li\u1ec7u c\u0169ng li\u00ean quan \u0111\u1ebfn vi\u1ec7c x\u1eed l\u00fd d\u1eef li\u1ec7u l\u1edbn (big data) v\u00e0 khai ph\u00e1 d\u1eef li\u1ec7u (data mining) \u0111\u1ec3 h\u1ed7 tr\u1ee3 quy\u1ebft \u0111\u1ecbnh kinh doanh.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-1.jpg\" alt=\"Chu\u1ea9n b\u1ecb \u0111\u1ea7y \u0111\u1ee7 c\u00e1c ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn Data Engineer tr\u01b0\u1edbc khi \u0111i ph\u1ecfng v\u1ea5n\" class=\"wp-image-6424\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-1.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-1-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-1-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Chu\u1ea9n b\u1ecb \u0111\u1ea7y \u0111\u1ee7 c\u00e1c ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn Data Engineer tr\u01b0\u1edbc khi \u0111i ph\u1ecfng v\u1ea5n<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_2_Khai_niem_mo_hinh_hoa_du_lieu\"><\/span><strong>C\u00e2u 2: Kh\u00e1i ni\u1ec7m m\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>M\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u l\u00e0 qu\u00e1 tr\u00ecnh bi\u1ec3u \u0111\u1ed3 h\u00f3a d\u1eef li\u1ec7u th\u00f4 th\u00e0nh c\u00e1c c\u1ea5u tr\u00fac logic ho\u1eb7c to\u00e1n h\u1ecdc \u0111\u1ec3 hi\u1ec3u, di\u1ec5n gi\u1ea3i, v\u00e0 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i m\u00f4 h\u00ecnh, nh\u01b0 m\u00f4 h\u00ecnh t\u01b0\u01a1ng quan, m\u00f4 h\u00ecnh h\u1ed3i quy, m\u00f4 h\u00ecnh ph\u00e2n lo\u1ea1i, m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u.&nbsp;<\/p>\n\n\n\n<p>M\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u gi\u00fap t\u00e1i hi\u1ec7n m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 d\u1eef li\u1ec7u, t\u1ea1o ra c\u00e1c d\u1ef1 \u0111o\u00e1n v\u00e0 gi\u1ea3i th\u00edch d\u1eef li\u1ec7u, h\u1ed7 tr\u1ee3 quy\u1ebft \u0111\u1ecbnh kinh doanh th\u00f4ng qua vi\u1ec7c t\u1ea1o ra c\u00e1c d\u1ef1 \u0111o\u00e1n v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u d\u1ef1a tr\u00ean m\u00f4 h\u00ecnh \u0111\u00e3 x\u00e2y d\u1ef1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_3_Neu_mot_so_luoc_do_thiet_ke_khi_lap_mo_hinh_du_lieu\"><\/span><strong>C\u00e2u 3: N\u00eau m\u1ed9t s\u1ed1 l\u01b0\u1ee3c \u0111\u1ed3 thi\u1ebft k\u1ebf khi l\u1eadp m\u00f4 h\u00ecnh d\u1eef li\u1ec7u<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>M\u1ed9t s\u1ed1 l\u01b0\u1ee3c \u0111\u1ed3 thi\u1ebft k\u1ebf khi l\u1eadp m\u00f4 h\u00ecnh d\u1eef li\u1ec7u ph\u1ed5 bi\u1ebfn nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hierarchical Schema (M\u00f4 h\u00ecnh ph\u00e2n c\u1ea5p).<\/li>\n\n\n\n<li>Network Schema (M\u00f4 h\u00ecnh m\u1ea1ng).<\/li>\n\n\n\n<li>Relational Schema (M\u00f4 h\u00ecnh quan h\u1ec7).<\/li>\n\n\n\n<li>Object-Oriented Schema (M\u00f4 h\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng).<\/li>\n\n\n\n<li>Entity-Relationship Schema (M\u00f4 h\u00ecnh th\u1ef1c th\u1ec3-quan h\u1ec7).<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-2.jpg\" alt=\"H\u00e3y t\u00ecm hi\u1ec3u v\u1ec1 ng\u00e0nh ngh\u1ec1 v\u00e0 th\u00f4ng tin c\u00f4ng ty tr\u01b0\u1edbc cu\u1ed9c ph\u1ecfng v\u1ea5n\" class=\"wp-image-6423\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-2.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-2-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-2-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>H\u00e3y t\u00ecm hi\u1ec3u v\u1ec1 ng\u00e0nh ngh\u1ec1 v\u00e0 th\u00f4ng tin c\u00f4ng ty tr\u01b0\u1edbc cu\u1ed9c ph\u1ecfng v\u1ea5n<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_4_Su_khac_nhau_cua_du_lieu_co_cau_truc_va_khong_cau_truc\"><\/span><strong>C\u00e2u 4: S\u1ef1 kh\u00e1c nhau c\u1ee7a d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac v\u00e0 kh\u00f4ng c\u1ea5u tr\u00fac<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>S\u1ef1 kh\u00e1c nhau nh\u01b0 sau:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u0110\u1eb7c \u0111i\u1ec3m<\/strong><\/td><td><strong>D\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac<\/strong><\/td><td><strong>D\u1eef li\u1ec7u kh\u00f4ng c\u1ea5u tr\u00fac<\/strong><\/td><\/tr><tr><td>\u0110\u1ecbnh d\u1ea1ng<\/td><td>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng, h\u00e0ng v\u00e0 c\u1ed9t, nh\u01b0 c\u01a1 s\u1edf d\u1eef li\u1ec7u trong <a href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ng\u00f4n ng\u1eef truy v\u1ea5n SQL<\/strong><\/a>.<\/td><td>Kh\u00f4ng tu\u00e2n theo c\u1ea5u tr\u00fac c\u1ee5 th\u1ec3, th\u01b0\u1eddng l\u00e0 d\u1ea1ng v\u0103n b\u1ea3n, h\u00ecnh \u1ea3nh, \u00e2m thanh ho\u1eb7c video.<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n giao th\u1ee9c<\/td><td>ODBC, SQL, ADO.NET<\/td><td>XML, CSV, SMSM, SMTP<\/td><\/tr><tr><td>Truy v\u1ea5n<\/td><td>C\u00f3 th\u1ec3 truy v\u1ea5n b\u1eb1ng SQL ho\u1eb7c c\u00e1c ng\u00f4n ng\u1eef truy v\u1ea5n d\u1ef1a tr\u00ean c\u1ea5u tr\u00fac.<\/td><td>Y\u00eau c\u1ea7u c\u00e1c c\u00f4ng c\u1ee5 x\u1eed l\u00fd ng\u00f4n ng\u1eef t\u1ef1 nhi\u00ean (NLP) ho\u1eb7c khai ph\u00e1 d\u1eef li\u1ec7u \u0111\u1ec3 truy v\u1ea5n.<\/td><\/tr><tr><td>X\u1eed l\u00fd<\/td><td>D\u1ec5 d\u00e0ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p bi\u1ebfn \u0111\u1ed5i v\u00e0 t\u00ednh to\u00e1n.<\/td><td>C\u1ea7n x\u1eed l\u00fd v\u00e0 ph\u00e2n t\u00edch m\u1ed9t c\u00e1ch ph\u1ee9c t\u1ea1p \u0111\u1ec3 tr\u00edch xu\u1ea5t th\u00f4ng tin.<\/td><\/tr><tr><td>V\u00ed d\u1ee5<\/td><td>S\u1ed1, v\u0103n b\u1ea3n, ng\u00e0y th\u00e1ng<\/td><td>V\u0103n b\u1ea3n, h\u00ecnh \u1ea3nh, video, \u00e2m thanh, m\u00e3,&#8230;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_5_Giai_thich_ngan_gon_ve_Hadoop\"><\/span><strong>C\u00e2u 5: Gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn v\u1ec1 Hadoop<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Hadoop l\u00e0 m\u1ed9t framework m\u00e3 ngu\u1ed3n m\u1edf d\u00f9ng \u0111\u1ec3 x\u1eed l\u00fd v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u l\u1edbn (big data). N\u00f3 d\u1ef1a tr\u00ean c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng ph\u00e2n t\u00e1n v\u00e0 s\u1eed d\u1ee5ng HDFS (Hadoop Distributed File System) \u0111\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, MapReduce \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u song song tr\u00ean c\u00e1c m\u00e1y ch\u1ee7. Hadoop cho ph\u00e9p ph\u00e2n chia c\u00f4ng vi\u1ec7c th\u00e0nh c\u00e1c t\u00e1c v\u1ee5 nh\u1ecf v\u00e0 ph\u00e2n ph\u1ed1i ch\u00fang tr\u00ean nhi\u1ec1u m\u00e1y t\u00ednh, gi\u00fap x\u1eed l\u00fd d\u1eef li\u1ec7u l\u1edbn m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng.<\/p>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-react-native\/\" target=\"_blank\" rel=\"noreferrer noopener\">Tr\u1ecdn B\u1ed9 C\u00e2u H\u1ecfi Ph\u1ecfng V\u1ea5n React Native Ph\u1ed5 Bi\u1ebfn, D\u1ec5 Tr\u00fang Tuy\u1ec3n<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-3.jpg\" alt=\"\u0110\u1ecdc k\u1ef9 JD v\u00e0 n\u1eafm r\u00f5 y\u00eau c\u1ea7u c\u00f4ng vi\u1ec7c v\u1ecb tr\u00ed Data Engineer \u0111ang \u1ee9ng tuy\u1ec3n\" class=\"wp-image-6422\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-3.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-3-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-3-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>\u0110\u1ecdc k\u1ef9 JD v\u00e0 n\u1eafm r\u00f5 y\u00eau c\u1ea7u c\u00f4ng vi\u1ec7c v\u1ecb tr\u00ed Data Engineer \u0111ang \u1ee9ng tuy\u1ec3n<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_6_NameNode_trong_HDFS_la_gi\"><\/span><strong>C\u00e2u 6: NameNode trong HDFS l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>NameNode trong HDFS (Hadoop Distributed File System) l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef ph\u00e2n t\u00e1n n\u00e0y. N\u00f3 ch\u1ecbu tr\u00e1ch nhi\u1ec7m qu\u1ea3n l\u00fd m\u00f4 t\u1ea3 v\u1ecb tr\u00ed v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c t\u1ec7p v\u00e0 th\u01b0 m\u1ee5c trong HDFS. NameNode duy tr\u00ec b\u1ea3n \u0111\u1ed3 metadata c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 ghi nh\u1eadt k\u00fd c\u00e1c thay \u0111\u1ed5i v\u00e0o \u1ed5 \u0111\u0129a.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_7_Trong_Big_Data_4_V_la_gi\"><\/span><strong>C\u00e2u 7: Trong Big Data, 4 V l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Trong Big Data, 4 V l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Volume (L\u01b0\u1ee3ng d\u1eef li\u1ec7u).<\/li>\n\n\n\n<li>Velocity (T\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u).<\/li>\n\n\n\n<li>Veracity (T\u00ednh ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u).<\/li>\n\n\n\n<li>Variety (\u0110a d\u1ea1ng d\u1eef li\u1ec7u).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_8_Trinh_quet_khoi_va_khoi_trong_HDFS_la_gi\"><\/span><strong>C\u00e2u 8: Tr\u00ecnh qu\u00e9t kh\u1ed1i v\u00e0 kh\u1ed1i trong HDFS l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Trong HDFS (Hadoop Distributed File System):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tr\u00ecnh qu\u00e9t kh\u1ed1i (DataNode) l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a n\u00fat d\u1eef li\u1ec7u (DataNode) trong HDFS.&nbsp;<\/li>\n\n\n\n<li>Kh\u1ed1i l\u00e0 \u0111\u01a1n v\u1ecb c\u01a1 b\u1ea3n c\u1ee7a d\u1eef li\u1ec7u trong HDFS. Theo m\u1eb7c \u0111\u1ecbnh, k\u00edch th\u01b0\u1edbc kh\u1ed1i th\u01b0\u1eddng l\u00e0 128MB ho\u1eb7c 256MB.\u00a0<\/li>\n<\/ul>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-nodejs\/\" target=\"_blank\" rel=\"noreferrer noopener\">T\u1ed5ng H\u1ee3p C\u00e2u H\u1ecfi Ph\u1ecfng V\u1ea5n NodeJS Th\u00f4ng D\u1ee5ng V\u00e0 Ph\u1ed5 Bi\u1ebfn Nh\u1ea5t<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-4.jpg\" alt=\"H\u00e3y \u0103n m\u1eb7c l\u1ecbch s\u1ef1 v\u00e0 \u0111\u1ebfn \u0111\u00fang gi\u1edd \u0111\u1ec3 t\u1ea1o \u1ea5n t\u01b0\u1ee3ng t\u00edch c\u1ef1c ban \u0111\u1ea7u trong ph\u1ecfng v\u1ea5n\" class=\"wp-image-6421\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-4.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-4-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-4-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>H\u00e3y \u0103n m\u1eb7c l\u1ecbch s\u1ef1 v\u00e0 \u0111\u1ebfn \u0111\u00fang gi\u1edd \u0111\u1ec3 t\u1ea1o \u1ea5n t\u01b0\u1ee3ng t\u00edch c\u1ef1c ban \u0111\u1ea7u trong ph\u1ecfng v\u1ea5n<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_9_Giai_thich_ngan_gon_ve_Snowflake\"><\/span><strong>C\u00e2u 9: Gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn v\u1ec1 Snowflake?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Snowflake l\u00e0 m\u1ed9t <a href=\"https:\/\/topviecit.vn\/blog\/he-quan-tri-co-so-du-lieu-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong><\/a> quan h\u1ec7 (RDBMS) d\u1ef1a tr\u00ean \u0111\u00e1m m\u00e2y, ph\u00e1t tri\u1ec3n cho vi\u1ec7c l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t d\u1eef li\u1ec7u l\u1edbn. \u0110\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a Snowflake l\u00e0 ki\u1ebfn tr\u00fac ph\u00e2n t\u00e1n v\u00e0 t\u1ef1 \u0111\u1ed9ng m\u1edf r\u1ed9ng, cho ph\u00e9p x\u1eed l\u00fd d\u1eef li\u1ec7u l\u1edbn m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, c\u00f3 t\u00ednh n\u0103ng kh\u00f4i ph\u1ee5c v\u00e0 sao l\u01b0u d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady, \u0111\u1ed3ng th\u1eddi h\u1ed7 tr\u1ee3 c\u00e1c t\u00ednh n\u0103ng nh\u01b0 t\u1ef1 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh v\u00e0 m\u00e3 h\u00f3a d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_10_Star_Schema_la_gi\"><\/span><strong>C\u00e2u 10: Star Schema l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Star Schema l\u00e0 m\u1ed9t ki\u1ec3u m\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u trong c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong kho d\u1eef li\u1ec7u (data warehouse) v\u00e0 h\u1ec7 th\u1ed1ng Business Intelligence (BI). M\u00f4 h\u00ecnh Star Schema gi\u00fap d\u1ec5 d\u00e0ng truy xu\u1ea5t v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u00e1c truy v\u1ea5n, v\u00e0 gi\u00fap ng\u01b0\u1eddi d\u00f9ng th\u1ef1c hi\u1ec7n c\u00e1c b\u00e1o c\u00e1o v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/data-engineer-hoc-nganh-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Data Engineer h\u1ecdc ng\u00e0nh g\u00ec? \u1ede \u0111\u00e2u? C\u01a1 h\u1ed9i vi\u1ec7c l\u00e0m ra sao?<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-5.jpg\" alt=\"H\u00e3y c\u1ed1 g\u1eafng ng\u00f4n ng\u1eef t\u1eed t\u1ebf, r\u00f5 r\u00e0ng v\u00e0 t\u1ef1 tin trong bu\u1ed5i ph\u1ecfng v\u1ea5n\" class=\"wp-image-6420\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-5.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-5-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-5-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>H\u00e3y c\u1ed1 g\u1eafng ng\u00f4n ng\u1eef t\u1eed t\u1ebf, r\u00f5 r\u00e0ng v\u00e0 t\u1ef1 tin trong bu\u1ed5i ph\u1ecfng v\u1ea5n<\/em><\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nhom_cau_hoi_phong_van_Data_Engineer_trung_cap\"><\/span><strong>Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer trung c\u1ea5p<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi nh\u1eefng \u1ee9ng vi\u00ean c\u00f3 kinh nghi\u1ec7m l\u00e0m vi\u1ec7c, ho\u1eb7c \u1edf c\u1ea5p b\u1eadc t\u1eeb Junior tr\u1edf l\u00ean, nh\u00e0 tuy\u1ec3n d\u1ee5ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e0y. H\u00e3y l\u01b0u \u00fd tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e0y trong qu\u00e1 tr\u00ecnh t\u01b0\u01a1ng t\u00e1c v\u1edbi nh\u00e0 tuy\u1ec3n d\u1ee5ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_11_Mot_so_phuong_phap_cua_Reducer_la_gi\"><\/span><strong>C\u00e2u 11: M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a Reducer l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ba ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh li\u00ean quan \u0111\u1ebfn Reducer:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>setup():<\/strong> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea5u h\u00ecnh c\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ea7u v\u00e0o c\u1ee7a d\u1eef li\u1ec7u v\u00e0 giao th\u1ee9c b\u1ed9 nh\u1edb \u0111\u1ec7m (cache).<\/li>\n\n\n\n<li><strong>cleanup():<\/strong> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c t\u1ec7p t\u1ea1m th\u1eddi \u0111\u00e3 l\u01b0u tr\u1eef.<\/li>\n\n\n\n<li><strong>reduce():<\/strong> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi m\u1ed9t l\u1ea7n cho m\u1ed7i key, v\u00e0 n\u00f3 l\u00e0 kh\u00eda c\u1ea1nh quan tr\u1ecdng nh\u1ea5t c\u1ee7a Reducer. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u1ef1c hi\u1ec7n vi\u1ec7c ch\u00ednh c\u1ee7a Reducer, x\u1eed l\u00fd v\u00e0 t\u00ednh to\u00e1n k\u1ebft qu\u1ea3 d\u1ef1a tr\u00ean c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ea7u v\u00e0o t\u01b0\u01a1ng \u1ee9ng v\u1edbi key \u0111\u00f3.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-6.jpg\" alt=\"Trong qu\u00e1 tr\u00ecnh ph\u1ecfng v\u1ea5n, h\u00e3y l\u1eafng nghe v\u00e0 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng\" class=\"wp-image-6419\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-6.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-6-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-6-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Trong qu\u00e1 tr\u00ecnh ph\u1ecfng v\u1ea5n, h\u00e3y l\u1eafng nghe v\u00e0 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_12_Neu_cac_che_do_khac_nhau_cua_Hadoop\"><\/span><strong>C\u00e2u 12: N\u00eau c\u00e1c ch\u1ebf \u0111\u1ed9 kh\u00e1c nhau c\u1ee7a Hadoop<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Hadoop th\u01b0\u1eddng c\u00f3 c\u00e1c ch\u1ebf \u0111\u1ed9 kh\u00e1c nhau, v\u00ed d\u1ee5 nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Standalone mode (Ch\u1ebf \u0111\u1ed9 \u0111\u1ed9c l\u1eadp).<\/li>\n\n\n\n<li>Pseudo distributed mode (Ch\u1ebf \u0111\u1ed9 ph\u00e2n ph\u1ed1i gi\u1ea3).<\/li>\n\n\n\n<li>Fully distributed mode (Ch\u1ebf \u0111\u1ed9 ph\u00e2n ph\u1ed1i \u0111\u1ea7y \u0111\u1ee7).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_13_Bao_mat_du_lieu_duoc_dam_bao_trong_Hadoop\"><\/span><strong>C\u00e2u 13: B\u1ea3o m\u1eadt d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o trong Hadoop<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c b\u01b0\u1edbc \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an ninh d\u1eef li\u1ec7u trong Hadoop:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>B\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c b\u1ea3o m\u1eadt k\u00eanh k\u1ebft n\u1ed1i: \u0110\u1ea3m b\u1ea3o r\u1eb1ng k\u00eanh k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 l\u00e0 an to\u00e0n v\u00e0 b\u1ea3o m\u1eadt.<\/li>\n\n\n\n<li>X\u00e1c minh v\u00e0 y\u00eau c\u1ea7u d\u1ecbch v\u1ee5: Kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng tem nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ec3 y\u00eau c\u1ea7u m\u1ed9t v\u00e9 d\u1ecbch v\u1ee5.<\/li>\n\n\n\n<li>S\u1eed d\u1ee5ng v\u00e9 d\u1ecbch v\u1ee5 \u0111\u1ec3 k\u1ebft n\u1ed1i: Kh\u00e1ch h\u00e0ng s\u1eed d\u1ee5ng v\u00e9 d\u1ecbch v\u1ee5 \u0111\u1ec3 k\u1ebft n\u1ed1i m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c v\u1edbi m\u00e1y ch\u1ee7 t\u01b0\u01a1ng \u1ee9ng.<\/li>\n<\/ul>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/luong-data-engineer\/\" target=\"_blank\" rel=\"noreferrer noopener\">L\u01b0\u01a1ng Data Engineer c\u00f3 cao kh\u00f4ng? Nh\u1eefng k\u1ef9 n\u0103ng \u0111\u1ec3 t\u0103ng l\u01b0\u01a1ng<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-7.jpg\" alt=\"C\u1ed1 g\u1eafng s\u1eed d\u1ee5ng ng\u00f4n ng\u1eef t\u00edch c\u1ef1c v\u00e0 th\u00e2n thi\u1ec7n khi tr\u00f2 chuy\u1ec7n v\u1edbi nh\u00e0 tuy\u1ec3n d\u1ee5ng\" class=\"wp-image-6418\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-7.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-7-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-7-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>C\u1ed1 g\u1eafng s\u1eed d\u1ee5ng ng\u00f4n ng\u1eef t\u00edch c\u1ef1c v\u00e0 th\u00e2n thi\u1ec7n khi tr\u00f2 chuy\u1ec7n v\u1edbi nh\u00e0 tuy\u1ec3n d\u1ee5ng<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_14_So_cong_mac_dinh_cho_Port_Tracker_Task_Tracker_va_NameNode_trong_Hadoop_la_gi\"><\/span><strong>C\u00e2u 14: S\u1ed1 c\u1ed5ng m\u1eb7c \u0111\u1ecbnh cho Port Tracker, Task Tracker v\u00e0 NameNode trong Hadoop l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>S\u1ed1 c\u1ed5ng m\u1eb7c \u0111\u1ecbnh c\u1ee7a nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NameNode: 50070.<\/li>\n\n\n\n<li>Port Tracker: 50030.<\/li>\n\n\n\n<li>Task Tracker: 50060.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_15_Big_Data_Analytics_tac_dong_den_doanh_thu_nhu_the_nao\"><\/span><strong>C\u00e2u 15: Big Data Analytics t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn doanh thu nh\u01b0 th\u1ebf n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>S\u1eed d\u1ee5ng <a href=\"https:\/\/topviecit.vn\/blog\/big-data-analyst\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Big Data Analytics<\/strong><\/a> c\u00f3 th\u1ec3 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn doanh thu \u1edf nh\u1eefng kh\u00eda c\u1ea1nh sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nh\u1eadn bi\u1ebft, ph\u00e1t hi\u1ec7n c\u01a1 h\u1ed9i th\u1ecb tr\u01b0\u1eddng m\u1edbi.<\/li>\n\n\n\n<li>T\u1ed1i \u01b0u h\u00f3a chi\u1ebfn l\u01b0\u1ee3c gi\u00e1 c\u1ea3.<\/li>\n\n\n\n<li>C\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1ecbch v\u1ee5 v\u00e0 t\u1ea1o l\u00f2ng trung th\u00e0nh t\u1eeb kh\u00e1ch h\u00e0ng.<\/li>\n\n\n\n<li>Qu\u1ea3n l\u00fd l\u01b0\u1ee3ng t\u1ed3n kho hi\u1ec7u qu\u1ea3.<\/li>\n\n\n\n<li>Ph\u00e2n lo\u1ea1i, t\u0103ng hi\u1ec7u qu\u1ea3 ti\u1ebfp th\u1ecb nh\u1eafm m\u1ee5c ti\u00eau.&nbsp;<\/li>\n\n\n\n<li>T\u1ed1i \u01b0u h\u00f3a ho\u1ea1t \u0111\u1ed9ng n\u1ed9i b\u1ed9.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_16_Du_lieu_duoc_luu_tru_trong_NameNode_la_gi\"><\/span><strong>C\u00e2u 16: D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong NameNode l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong NameNode l\u00e0 c\u00e1c th\u00f4ng tin metadata c\u1ee7a h\u1ec7 th\u1ed1ng HDFS, bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u00ean c\u1ee7a c\u00e1c file.<\/li>\n\n\n\n<li>\u0110\u01b0\u1eddng d\u1eabn c\u1ee7a c\u00e1c file.<\/li>\n\n\n\n<li>K\u00edch th\u01b0\u1edbc c\u1ee7a c\u00e1c file.<\/li>\n\n\n\n<li>S\u1ed1 l\u01b0\u1ee3ng block c\u1ee7a c\u00e1c file.<\/li>\n\n\n\n<li>V\u1ecb tr\u00ed c\u1ee7a c\u00e1c block.<\/li>\n\n\n\n<li>Quy\u1ec1n truy c\u1eadp c\u1ee7a c\u00e1c file.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-8.jpg\" alt=\"H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn ng\u00f4n ng\u1eef c\u01a1 th\u1ec3 c\u1ee7a b\u1ea1n trong qu\u00e1 tr\u00ecnh ph\u1ecfng v\u1ea5n\" class=\"wp-image-6417\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-8.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-8-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-8-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn ng\u00f4n ng\u1eef c\u01a1 th\u1ec3 c\u1ee7a b\u1ea1n trong qu\u00e1 tr\u00ecnh ph\u1ecfng v\u1ea5n<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_17_Cong_dung_cua_Metastore_trong_Hive_la_gi\"><\/span><strong>C\u00e2u 17: C\u00f4ng d\u1ee5ng c\u1ee7a Metastore trong Hive l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Metastore trong Hive l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a h\u1ec7 th\u1ed1ng Hive, v\u00e0 nhi\u1ec7m v\u1ee5 ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 qu\u1ea3n l\u00fd si\u00eau d\u1eef li\u1ec7u (metadata) li\u00ean quan \u0111\u1ebfn c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 b\u1ea3ng \u0111\u01b0\u1ee3c t\u1ea1o trong Hive. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c c\u00f4ng d\u1ee5ng ch\u00ednh c\u1ee7a Metastore:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>L\u01b0u tr\u1eef Metadata.<\/li>\n\n\n\n<li>T\u1ed1i \u01b0u h\u00f3a truy v\u1ea5n.<\/li>\n\n\n\n<li>Qu\u1ea3n l\u00fd quy\u1ec1n truy c\u1eadp.<\/li>\n\n\n\n<li>T\u1ea1o v\u00e0 qu\u1ea3n l\u00fd b\u1ea3ng.<\/li>\n\n\n\n<li>\u0110\u1ed3ng b\u1ed9 d\u1eef li\u1ec7u v\u00e0 Metadata.<\/li>\n\n\n\n<li>H\u1ed7 tr\u1ee3 cho c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 giao di\u1ec7n kh\u00e1c.<\/li>\n<\/ul>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/java-fresher\/\" target=\"_blank\" rel=\"noreferrer noopener\">13 C\u00e2u H\u1ecfi Ph\u1ecfng V\u1ea5n Java Fresher Ph\u1ed5 Bi\u1ebfn C\u00f3 \u0110\u00e1p \u00c1n<\/a><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nhom_cau_hoi_phong_van_Data_Engineer_nang_cao\"><\/span><strong>Nh\u00f3m c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e2ng cao<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>V\u1edbi \u0111\u1ed9 kh\u00f3 cao h\u01a1n, nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c nh\u00e0 tuy\u1ec3n d\u1ee5ng l\u1ef1a ch\u1ecdn cho nh\u1eefng \u1ee9ng vi\u00ean c\u00f3 c\u1ea5p b\u1eadc t\u1eeb Senior tr\u1edf l\u00ean. B\u00ean c\u1ea1nh \u0111\u00f3, nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi ph\u1ecfng v\u1ea5n nh\u1eefng v\u1ecb tr\u00ed t\u1eeb c\u1ea5p b\u1eadc qu\u1ea3n l\u00fd tr\u1edf l\u00ean.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_18_Trong_mo_hinh_du_lieu_Hive_cac_thanh_phan_co_san_la_gi\"><\/span><strong>C\u00e2u 18: Trong m\u00f4 h\u00ecnh d\u1eef li\u1ec7u Hive, c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 s\u1eb5n l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Trong m\u00f4 h\u00ecnh d\u1eef li\u1ec7u Hive, c\u00f3 c\u00e1c th\u00e0nh ph\u1ea7n sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Databases (C\u01a1 s\u1edf d\u1eef li\u1ec7u).<\/li>\n\n\n\n<li>Tables (B\u1ea3ng).<\/li>\n\n\n\n<li>Partitions (Ph\u00e2n v\u00f9ng).<\/li>\n\n\n\n<li>Buckets or clusters (Nh\u00f3m ho\u1eb7c c\u1ee5m).<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-9.jpg\" alt=\"B\u1ea1n n\u00ean \u0111\u1ebfn s\u1edbm tr\u01b0\u1edbc th\u1eddi gian ph\u1ecfng v\u1ea5n t\u1eeb 10 - 15 ph\u00fat\" class=\"wp-image-6416\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-9.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-9-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-9-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>B\u1ea1n n\u00ean \u0111\u1ebfn s\u1edbm tr\u01b0\u1edbc th\u1eddi gian ph\u1ecfng v\u1ea5n t\u1eeb 10 &#8211; 15 ph\u00fat<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_19_Co_the_tao_bao_nhieu_bang_cho_mot_tep_du_lieu_rieng_le\"><\/span><strong>C\u00e2u 19: C\u00f3 th\u1ec3 t\u1ea1o bao nhi\u00eau b\u1ea3ng cho m\u1ed9t t\u1ec7p d\u1eef li\u1ec7u ri\u00eang l\u1ebb?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Trong m\u00f4 h\u00ecnh d\u1eef li\u1ec7u Hive, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o nhi\u1ec1u b\u1ea3ng cho m\u1ed9t t\u1ec7p d\u1eef li\u1ec7u ri\u00eang l\u1ebb. Hive h\u1ed7 tr\u1ee3 vi\u1ec7c t\u1ea1o c\u00e1c b\u1ea3ng \u1ea3o (external table) v\u00e0 b\u1ea3ng \u1ea3o ph\u00e2n v\u00f9ng (partitioned external table) tr\u00ean c\u00f9ng m\u1ed9t t\u1ec7p d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_20_Bang_Skewed_trong_Hive_co_y_nghia_gi\"><\/span><strong>C\u00e2u 20: B\u1ea3ng Skewed trong Hive c\u00f3 \u00fd ngh\u0129a g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>B\u1ea3ng Skewed (Skewed Table) trong Hive l\u00e0 m\u1ed9t t\u00ednh n\u0103ng cho ph\u00e9p b\u1ea1n x\u00e1c \u0111\u1ecbnh r\u1eb1ng m\u1ed9t ho\u1eb7c v\u00e0i gi\u00e1 tr\u1ecb trong m\u1ed9t c\u1ed9t c\u1ee5 th\u1ec3 xu\u1ea5t hi\u1ec7n v\u1edbi t\u1ea7n su\u1ea5t cao h\u01a1n so v\u1edbi gi\u00e1 tr\u1ecb kh\u00e1c trong c\u1ed9t \u0111\u00f3. \u00dd ngh\u0129a c\u1ee7a b\u1ea3ng Skewed trong Hive bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u1ed1i \u01b0u h\u00f3a truy v\u1ea5n.<\/li>\n\n\n\n<li>Gi\u1ea3m thi\u1ec3u c\u00f4ng s\u1ee9c l\u1eadp ch\u1ec9 m\u1ee5c.<\/li>\n\n\n\n<li>Ti\u1ebft ki\u1ec7m kh\u00f4ng gian l\u01b0u tr\u1eef.<\/li>\n\n\n\n<li>T\u0103ng hi\u1ec7u su\u1ea5t.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_21_Cac_bo_suu_tap_co_trong_Hive_la_gi\"><\/span><strong>C\u00e2u 21: C\u00e1c b\u1ed9 s\u01b0u t\u1eadp c\u00f3 trong Hive l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Trong Hive c\u00f3 c\u00e1c b\u1ed9 s\u01b0u t\u1eadp nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Array (M\u1ea3ng).<\/li>\n\n\n\n<li>Map (B\u1ea3n \u0111\u1ed3\/Danh s\u00e1ch).<\/li>\n\n\n\n<li>Struct (C\u1ea5u tr\u00fac\/T\u1eadp h\u1ee3p).<\/li>\n\n\n\n<li>Union (Li\u00ean hi\u1ec7p).<\/li>\n\n\n\n<li>Parquet, ORC,&#8230;<\/li>\n<\/ul>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/tuyen-tap-nhung-cau-hoi-phong-van-front-end\/\" target=\"_blank\" rel=\"noreferrer noopener\">Tuy\u1ec3n T\u1eadp Nh\u1eefng C\u00e2u H\u1ecfi Ph\u1ecfng V\u1ea5n Front End Hay G\u1eb7p Nh\u1ea5t<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-10.jpg\" alt=\"Sau khi nh\u00e0 tuy\u1ec3n d\u1ee5ng \u0111\u00e3 h\u1ecfi h\u1ebft c\u00e2u h\u1ecfi, b\u1ea1n n\u00ean ch\u1ee7 \u0111\u1ed9ng h\u1ecfi c\u00e2u h\u1ecfi c\u1ee7a m\u00ecnh\" class=\"wp-image-6415\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-10.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-10-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-10-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Sau khi nh\u00e0 tuy\u1ec3n d\u1ee5ng \u0111\u00e3 h\u1ecfi h\u1ebft c\u00e2u h\u1ecfi, b\u1ea1n n\u00ean ch\u1ee7 \u0111\u1ed9ng h\u1ecfi c\u00e2u h\u1ecfi c\u1ee7a m\u00ecnh<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_22_Trong_Hive_SerDe_la_gi\"><\/span><strong>C\u00e2u 22: Trong Hive, SerDe l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>SerDe (Serialization\/Deserialization) trong Hive l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng cho ph\u00e9p Hive hi\u1ec3u v\u00e0 x\u1eed l\u00fd c\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u kh\u00f4ng ph\u1ea3i l\u00e0 v\u0103n b\u1ea3n (non-textual data formats) nh\u01b0 Avro, Parquet, ORC, JSON, v\u00e0 nhi\u1ec1u \u0111\u1ecbnh d\u1ea1ng kh\u00e1c. SerDe \u0111\u00f3ng vai tr\u00f2 l\u00e0m c\u1ea7u n\u1ed1i gi\u1eefa Hive v\u00e0 c\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u n\u00e0y. C\u1ee5 th\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Serialization (Tr\u00ecnh k\u1ebft xu\u1ea5t): SerDe chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u t\u1eeb c\u1ea5u tr\u00fac b\u1ea3ng Hive th\u00e0nh \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u kh\u00f4ng ph\u1ea3i l\u00e0 v\u0103n b\u1ea3n khi b\u1ea1n l\u01b0u tr\u1eef d\u1eef li\u1ec7u v\u00e0o c\u00e1c \u0111\u1ecbnh d\u1ea1ng nh\u01b0 Avro ho\u1eb7c Parquet.<\/li>\n\n\n\n<li>Deserialization (Tr\u00ecnh ph\u00e2n gi\u1ea3i): SerDe th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c ng\u01b0\u1ee3c l\u1ea1i b\u1eb1ng c\u00e1ch chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u t\u1eeb c\u00e1c \u0111\u1ecbnh d\u1ea1ng kh\u00f4ng ph\u1ea3i l\u00e0 v\u0103n b\u1ea3n th\u00e0nh c\u1ea5u tr\u00fac d\u1eef li\u1ec7u Hive khi b\u1ea1n truy v\u1ea5n d\u1eef li\u1ec7u t\u1eeb c\u00e1c t\u1ec7p ho\u1eb7c b\u1ea3ng l\u01b0u tr\u1eef trong c\u00e1c \u0111\u1ecbnh d\u1ea1ng n\u00e0y.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-11.jpg\" alt=\"Nh\u00e0 tuy\u1ec3n d\u1ee5ng s\u1ebd \u0111\u00e1nh gi\u00e1 cao s\u1ef1 ch\u00e2n th\u00e0nh v\u00e0 trung th\u1ef1c c\u1ee7a b\u1ea1n\" class=\"wp-image-6414\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-11.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-11-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-11-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Nh\u00e0 tuy\u1ec3n d\u1ee5ng s\u1ebd \u0111\u00e1nh gi\u00e1 cao s\u1ef1 ch\u00e2n th\u00e0nh v\u00e0 trung th\u1ef1c c\u1ee7a b\u1ea1n<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_23_Data_Warehouse_va_Database_khac_nhau_nhu_the_nao\"><\/span><strong>C\u00e2u 23: Data Warehouse v\u00e0 Database kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Data warehouse v\u00e0 database l\u00e0 hai kh\u00e1i ni\u1ec7m kh\u00e1c nhau, nh\u01b0ng th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi nhau. C\u1ea3 hai \u0111\u1ec1u l\u00e0 h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u, nh\u01b0ng ch\u00fang c\u00f3 nh\u1eefng m\u1ee5c \u0111\u00edch v\u00e0 ch\u1ee9c n\u0103ng kh\u00e1c nhau. C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>\u0110\u1eb7c \u0111i\u1ec3m<\/strong><\/td><td><strong>Data Warehouse<\/strong><\/td><td><strong>Database<\/strong><\/td><\/tr><tr><td>M\u1ee5c \u0111\u00edch<\/td><td>D\u00f9ng \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u l\u1edbn, h\u1ed7 tr\u1ee3 quy\u1ebft \u0111\u1ecbnh kinh doanh v\u00e0 b\u00e1o c\u00e1o.<\/td><td>D\u00f9ng \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c ghi v\u00e0 \u0111\u1ecdc.<\/td><\/tr><tr><td>Ph\u1ea1m vi d\u1eef li\u1ec7u<\/td><td>L\u01b0u tr\u1eef d\u1eef li\u1ec7u l\u1edbn, l\u1ecbch s\u1eed v\u00e0 c\u00f3 t\u00ednh ch\u1ea5t ph\u00e2n t\u00e1n t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau.<\/td><td>L\u01b0u tr\u1eef d\u1eef li\u1ec7u th\u01b0\u1eddng nh\u1ecf h\u01a1n, \u0111\u01a1n gi\u1ea3n v\u00e0 li\u00ean quan ch\u1eb7t ch\u1ebd \u0111\u1ebfn \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/td><\/tr><tr><td>C\u1ea5u tr\u00fac d\u1eef li\u1ec7u<\/td><td>D\u1eef li\u1ec7u th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c theo d\u1ea1ng chu\u1ea9n h\u00f3a v\u00e0 phi chu\u1ea9n h\u00f3a, th\u00edch h\u1ee3p cho vi\u1ec7c truy v\u1ea5n ph\u1ee9c t\u1ea1p.<\/td><td>D\u1eef li\u1ec7u th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c theo c\u1ea5u tr\u00fac, b\u1ea3ng, v\u00e0 quan h\u1ec7 d\u1ea1ng SQL.<\/td><\/tr><tr><td>Truy v\u1ea5n<\/td><td>D\u00f9ng cho truy v\u1ea5n ph\u1ee9c t\u1ea1p v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u \u0111\u1ec3 h\u1ed7 tr\u1ee3 quy\u1ebft \u0111\u1ecbnh kinh doanh.<\/td><td>Th\u01b0\u1eddng d\u00f9ng cho truy v\u1ea5n \u0111\u01a1n gi\u1ea3n v\u00e0 thao t\u00e1c th\u01b0\u1eddng ng\u00e0y v\u1edbi d\u1eef li\u1ec7u.<\/td><\/tr><tr><td>Hi\u1ec7u su\u1ea5t<\/td><td>C\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng truy v\u1ea5n v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u l\u1edbn v\u00e0 ph\u1ee9c t\u1ea1p.<\/td><td>T\u1eadp trung v\u00e0o vi\u1ec7c \u0111\u00e1p \u1ee9ng thao t\u00e1c ghi v\u00e0 \u0111\u1ecdc d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch nhanh ch\u00f3ng.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_24_Vai_tro_cua_tep_hiverc_trong_Hive_la_gi\"><\/span><strong>C\u00e2u 24: Vai tr\u00f2 c\u1ee7a t\u1ec7p .hiverc trong Hive l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>T\u1ec7p .hiverc (ho\u1eb7c .hiverc.txt) trong Hive l\u00e0 m\u1ed9t t\u1ec7p c\u1ea5u h\u00ecnh t\u00f9y ch\u1ec9nh m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o \u0111\u1ec3 thi\u1ebft l\u1eadp v\u00e0 t\u00f9y ch\u1ec9nh c\u1ea5u h\u00ecnh m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c khi b\u1ea1n kh\u1edfi \u0111\u1ed9ng Hive CLI (Command Line Interface) ho\u1eb7c HiveServer2. Vai tr\u00f2 ch\u00ednh c\u1ee7a t\u1ec7p .hiverc l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u00f9y ch\u1ec9nh c\u1ea5u h\u00ecnh m\u1eb7c \u0111\u1ecbnh.<\/li>\n\n\n\n<li>T\u1ea1o Aliases (B\u00ed danh).<\/li>\n\n\n\n<li>Th\u1ef1c hi\u1ec7n t\u00e1c v\u1ee5 t\u1ef1 \u0111\u1ed9ng.<\/li>\n\n\n\n<li>T\u00f9y ch\u1ec9nh giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<\/ul>\n\n\n\n<p><strong>T\u00ecm hi\u1ec3u th\u00eam: <\/strong><a href=\"https:\/\/topviecit.vn\/blog\/cv-xin-viec-nganh-it\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>H\u01b0\u1edbng d\u1eabn vi\u1ebft CV xin vi\u1ec7c ng\u00e0nh IT chuy\u00ean nghi\u1ec7p t\u1eeb A \u0111\u1ebfn Z<\/strong><\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_25_args_va_kwargs_dung_de_lam_gi\"><\/span><strong>C\u00e2u 25: *args v\u00e0 **kwargs d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>*args v\u00e0 **kwargs l\u00e0 hai tham s\u1ed1 \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1eed l\u00fd s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed1i s\u1ed1 \u0111\u1ea7u v\u00e0o c\u00f3 th\u1ec3 bi\u1ebfn \u0111\u1ed5i trong m\u1ed9t h\u00e0m. . Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m c\u00e1c c\u00f4ng vi\u1ec7c sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>*args (Arguments): <\/strong>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &#8220;star arguments,&#8221; tham s\u1ed1 n\u00e0y cho ph\u00e9p b\u1ea1n truy\u1ec1n m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng bi\u1ebfn \u0111\u1ed5i c\u1ee7a \u0111\u1ed1i s\u1ed1 (arguments) v\u00e0o h\u00e0m m\u00e0 kh\u00f4ng c\u1ea7n x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc s\u1ed1 l\u01b0\u1ee3ng c\u1ee5 th\u1ec3. C\u00e1c \u0111\u1ed1i s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c g\u00f3i th\u00e0nh m\u1ed9t tuple v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1.<\/li>\n\n\n\n<li><strong>**kwargs (Keyword Arguments):<\/strong> Th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &#8220;double star arguments,&#8221; tham s\u1ed1 n\u00e0y cho ph\u00e9p b\u1ea1n truy\u1ec1n m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng bi\u1ebfn \u0111\u1ed5i c\u1ee7a \u0111\u1ed1i s\u1ed1 d\u01b0\u1edbi d\u1ea1ng c\u1eb7p key-value (keyword arguments) v\u00e0o h\u00e0m m\u00e0 kh\u00f4ng c\u1ea7n x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc s\u1ed1 l\u01b0\u1ee3ng c\u1ee5 th\u1ec3. C\u00e1c \u0111\u1ed1i s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c g\u00f3i th\u00e0nh m\u1ed9t t\u1eeb \u0111i\u1ec3n (dictionary) v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng key.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-12.jpg\" alt=\"Sau cu\u1ed9c ph\u1ecfng v\u1ea5n, g\u1eedi m\u1ed9t th\u01b0 c\u1ea3m \u01a1n qua email cho nh\u00e0 tuy\u1ec3n d\u1ee5ng\" class=\"wp-image-6413\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-12.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-12-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/09\/cau-hoi-phong-van-data-engineer-topcv-12-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Sau cu\u1ed9c ph\u1ecfng v\u1ea5n, g\u1eedi m\u1ed9t th\u01b0 c\u1ea3m \u01a1n qua email cho nh\u00e0 tuy\u1ec3n d\u1ee5ng<\/em><\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_26_Cach_de_xem_cau_truc_cua_co_so_du_lieu_bang_MySQL_la_gi\"><\/span><strong>C\u00e2u 26: C\u00e1ch \u0111\u1ec3 xem c\u1ea5u tr\u00fac c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng MySQL l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0110\u1ec3 xem c\u1ea5u tr\u00fac c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eb1ng MySQL, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c c\u00e2u l\u1ec7nh SQL ho\u1eb7c c\u00e1c c\u00f4ng c\u1ee5 qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u nh\u01b0 phpMyAdmin ho\u1eb7c MySQL Workbench. V\u00ed d\u1ee5 nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u1eed d\u1ee5ng c\u00e2u l\u1ec7nh SQL: B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c c\u00e2u l\u1ec7nh SQL \u0111\u1ec3 xem th\u00f4ng tin v\u1ec1 c\u1ea5u tr\u00fac c\u01a1 s\u1edf d\u1eef li\u1ec7u, c\u00e1c b\u1ea3ng, c\u1ed9t, v\u00e0 ch\u1ec9 m\u1ee5c. S\u1eed d\u1ee5ng c\u00e2u l\u1ec7nh <strong>DESCRIBE, SHOW TABLES<\/strong>, ho\u1eb7c <strong>SHOW COLUMNS<\/strong> \u0111\u1ec3 truy c\u1eadp th\u00f4ng tin chi ti\u1ebft v\u1ec1 c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 b\u1ea3ng.<\/li>\n\n\n\n<li><strong>S\u1eed d\u1ee5ng MySQL Workbench: <\/strong>MySQL Workbench l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u1ed5 bi\u1ebfn cho MySQL. B\u1ea1n c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i \u0111\u1ebfn c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh v\u00e0 s\u1eed d\u1ee5ng giao di\u1ec7n \u0111\u1ed3 h\u1ecda \u0111\u1ec3 xem c\u1ea5u tr\u00fac b\u1ea3ng, c\u1ed9t, v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c trong c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li><strong>S\u1eed d\u1ee5ng phpMyAdmin:<\/strong> phpMyAdmin l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng web mi\u1ec5n ph\u00ed cho ph\u00e9p b\u1ea1n qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u MySQL qua giao di\u1ec7n web. B\u1ea1n c\u00f3 th\u1ec3 \u0111\u0103ng nh\u1eadp v\u00e0o phpMyAdmin, ch\u1ecdn c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh, v\u00e0 xem c\u1ea5u tr\u00fac c\u00e1c b\u1ea3ng v\u00e0 c\u1ed9t th\u00f4ng qua giao di\u1ec7n d\u1ec5 s\u1eed d\u1ee5ng.<\/li>\n<\/ul>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/lo-trinh-thang-tien-data-engineer\/\" target=\"_blank\" rel=\"noreferrer noopener\">Data Engineer L\u00e0 G\u00ec? L\u1ed9 Tr\u00ecnh Th\u0103ng Ti\u1ebfn C\u1ee7a Data Engineer Nh\u01b0 Th\u1ebf N\u00e0o?<\/a><\/strong><\/p>\n\n\n\n<p>Hy v\u1ecdng v\u1edbi tr\u1ecdn b\u1ed9 <strong>c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer<\/strong> m\u1edbi nh\u1ea5t k\u00e8m c\u00e2u tr\u1ea3 l\u1eddi \u1edf tr\u00ean, b\u1ea1n s\u1ebd c\u00f3 m\u1ed9t h\u00e0nh trang v\u1eefng ch\u1eafc \u0111\u1ec3 chu\u1ea9n b\u1ecb cho bu\u1ed5i ph\u1ecfng v\u1ea5n. B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o trang web<strong> <\/strong><a href=\"https:\/\/www.topcv.vn\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>TopCV.vn<\/strong><\/a> \u0111\u1ec3 kh\u00e1m ph\u00e1 th\u00eam c\u00e1c c\u01a1 h\u1ed9i <a href=\"https:\/\/www.topcv.vn\/tim-viec-lam-data-engineer\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>vi\u1ec7c l\u00e0m Data Engineer<\/strong><\/a> h\u1ea5p d\u1eabn.<\/p>\n\n\n\n<p>T\u1ea1i TopCV.vn, b\u1ea1n s\u1ebd d\u1ec5 d\u00e0ng ti\u1ebfp c\u1eadn \u0111\u01b0\u1ee3c v\u1edbi nhi\u1ec1u doanh nghi\u1ec7p h\u00e0ng \u0111\u1ea7u hi\u1ec7n nay. B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 t\u00ecm \u0111\u01b0\u1ee3c nh\u1eefng c\u00f4ng vi\u1ec7c ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c ti\u00eau, n\u0103ng l\u1ef1c, kinh nghi\u1ec7m,&#8230; c\u1ee7a b\u1ea1n. Ch\u00fac b\u1ea1n th\u00e0nh c\u00f4ng!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ec3 v\u01b0\u1ee3t qua v\u00f2ng ph\u1ecfng v\u1ea5n cho v\u1ecb tr\u00ed Data Engineer, b\u1ea1n c\u1ea7n chu\u1ea9n b\u1ecb k\u1ef9 l\u01b0\u1ee1ng. V\u1eady, nh\u00e0 tuy\u1ec3n d\u1ee5ng s\u1ebd s\u1eed d\u1ee5ng nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e0o? H\u00e3y c\u00f9ng TopviecIT.vn t\u00ecm hi\u1ec3u nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer m\u1edbi nh\u1ea5t hi\u1ec7n nay k\u00e8m c\u00e2u tr\u1ea3 l\u1eddi trong b\u00e0i vi\u1ebft [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6425,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[86],"tags":[],"class_list":["post-6412","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chia-se-kinh-nghiem"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Tr\u1ecdn b\u1ed9 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer m\u1edbi nh\u1ea5t k\u00e8m c\u00e2u tr\u1ea3 l\u1eddi<\/title>\n<meta name=\"description\" content=\"Nh\u00e0 tuy\u1ec3n d\u1ee5ng s\u1ebd s\u1eed d\u1ee5ng nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Data Engineer n\u00e0o? 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