{"id":1916,"date":"2022-05-20T11:21:46","date_gmt":"2022-05-20T11:21:46","guid":{"rendered":"https:\/\/topviecit.vn\/blog\/?p=1916"},"modified":"2022-05-20T11:21:47","modified_gmt":"2022-05-20T11:21:47","slug":"phong-van-java","status":"publish","type":"post","link":"https:\/\/topviecit.vn\/blog\/phong-van-java\/","title":{"rendered":"T\u1ea5t t\u1ea7n t\u1eadt kinh nghi\u1ec7m ph\u1ecfng v\u1ea5n Java chinh ph\u1ee5c nh\u00e0 tuy\u1ec3n d\u1ee5ng"},"content":{"rendered":"\n<p>B\u01b0\u1edbc v\u00e0o cu\u1ed9c ph\u1ecfng v\u1ea5n vi\u1ec7c l\u00e0m n\u00f3i chung v\u00e0 ph\u1ecfng v\u1ea5n Java n\u00f3i ri\u00eang, nhi\u1ec1u ng\u01b0\u1eddi lo l\u1eafng kh\u00f4ng bi\u1ebft m\u00ecnh c\u1ea7n chu\u1ea9n b\u1ecb nh\u1eefng g\u00ec \u0111\u1ec3 \u0111\u01b0\u1ee3c tuy\u1ec3n d\u1ee5ng. Trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y, <strong><a href=\"https:\/\/topviecit.vn\/\">topviecit.vn<\/a><\/strong> s\u1ebd g\u1ee3i \u00fd cho b\u1ea1n m\u1ed9t s\u1ed1 kinh nghi\u1ec7m v\u00e0 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java ph\u1ed5 bi\u1ebfn nh\u1ea5t h\u00e3y c\u00f9ng\u00a0tham kh\u1ea3o nh\u00e9.\u00a0<\/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\/phong-van-java\/#Kinh_nghiem_phong_van_Java\" title=\"Kinh nghi\u1ec7m ph\u1ecfng v\u1ea5n Java\u00a0\">Kinh nghi\u1ec7m ph\u1ecfng v\u1ea5n Java\u00a0<\/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\/phong-van-java\/#Tim_hieu_ky_ban_mo_ta_cong_viec_cong_ty_vi_tri_ma_minh_ung_tuyen\" title=\"T\u00ecm hi\u1ec3u k\u1ef9 b\u1ea3n m\u00f4 t\u1ea3 c\u00f4ng vi\u1ec7c, c\u00f4ng ty, v\u1ecb tr\u00ed m\u00e0 m\u00ecnh \u1ee9ng tuy\u1ec3n\">T\u00ecm hi\u1ec3u k\u1ef9 b\u1ea3n m\u00f4 t\u1ea3 c\u00f4ng vi\u1ec7c, c\u00f4ng ty, v\u1ecb tr\u00ed m\u00e0 m\u00ecnh \u1ee9ng tuy\u1ec3n<\/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\/phong-van-java\/#Chuan_bi_kien_thuc_chuyen_mon_vung\" title=\"Chu\u1ea9n b\u1ecb ki\u1ebfn th\u1ee9c chuy\u00ean m\u00f4n v\u1eefng&nbsp;\">Chu\u1ea9n b\u1ecb ki\u1ebfn th\u1ee9c chuy\u00ean m\u00f4n v\u1eefng&nbsp;<\/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\/phong-van-java\/#Giu_thai_do_chan_thanh_tu_tin_trong_khi_phong_van\" title=\"Gi\u1eef th\u00e1i \u0111\u1ed9 ch\u00e2n th\u00e0nh, t\u1ef1 tin trong khi ph\u1ecfng v\u1ea5n\">Gi\u1eef th\u00e1i \u0111\u1ed9 ch\u00e2n th\u00e0nh, t\u1ef1 tin trong khi ph\u1ecfng v\u1ea5n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topviecit.vn\/blog\/phong-van-java\/#Top_10_cau_hoi_phong_van_Java_thuong_gap\" title=\"Top 10 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java th\u01b0\u1eddng g\u1eb7p\">Top 10 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java th\u01b0\u1eddng g\u1eb7p<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topviecit.vn\/blog\/phong-van-java\/#Cau_1_Java_la_gi\" title=\"C\u00e2u 1: Java l\u00e0 g\u00ec?\">C\u00e2u 1: Java 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-7\" href=\"https:\/\/topviecit.vn\/blog\/phong-van-java\/#Cau_2_Java_co_tinh_huong_doi_tuong_hoan_toan_khong\" title=\"C\u00e2u 2: Java c\u00f3 t\u00ednh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ho\u00e0n to\u00e0n kh\u00f4ng?\">C\u00e2u 2: Java c\u00f3 t\u00ednh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ho\u00e0n to\u00e0n kh\u00f4ng?<\/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\/phong-van-java\/#Cau_3_Neu_mot_so_tinh_nang_noi_bat_cua_ngon_ngu_lap_trinh_Java\" title=\"C\u00e2u 3: N\u00eau m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh Java\">C\u00e2u 3: N\u00eau m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh Java<\/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\/phong-van-java\/#Cau_4_Su_khac_biet_giua_JDK_JVM_va_JRE_nhu_the_nao\" title=\"C\u00e2u 4: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa JDK, JVM v\u00e0 JRE nh\u01b0 th\u1ebf n\u00e0o?\">C\u00e2u 4: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa JDK, JVM v\u00e0 JRE 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-10\" href=\"https:\/\/topviecit.vn\/blog\/phong-van-java\/#Cau_5_Lam_sao_de_phan_biet_lop_truu_tuong_voi_giao_dien\" title=\"C\u00e2u 5: L\u00e0m sao \u0111\u1ec3 ph\u00e2n bi\u1ec7t l\u1edbp tr\u1eebu t\u01b0\u1ee3ng v\u1edbi giao di\u1ec7n?&nbsp;\">C\u00e2u 5: L\u00e0m sao \u0111\u1ec3 ph\u00e2n bi\u1ec7t l\u1edbp tr\u1eebu t\u01b0\u1ee3ng v\u1edbi giao di\u1ec7n?&nbsp;<\/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\/phong-van-java\/#Cau_6_Phan_biet_Path_va_Classpath_Variables\" title=\"C\u00e2u 6: Ph\u00e2n bi\u1ec7t Path v\u00e0 Classpath Variables&nbsp;\">C\u00e2u 6: Ph\u00e2n bi\u1ec7t Path v\u00e0 Classpath Variables&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/topviecit.vn\/blog\/phong-van-java\/#Cau_7_%E2%80%9CGarbage_Collection%E2%80%9D_dung_lam_gi\" title=\"C\u00e2u 7: \u201cGarbage Collection\u201d d\u00f9ng l\u00e0m g\u00ec?&nbsp;\">C\u00e2u 7: \u201cGarbage Collection\u201d d\u00f9ng l\u00e0m g\u00ec?&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/topviecit.vn\/blog\/phong-van-java\/#Cau_8_Neu_su_khac_biet_giua_Jar_va_WAR\" title=\"C\u00e2u 8: N\u00eau s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa Jar v\u00e0 WAR&nbsp;\">C\u00e2u 8: N\u00eau s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa Jar v\u00e0 WAR&nbsp;<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kinh_nghiem_phong_van_Java\"><\/span><strong>Kinh nghi\u1ec7m ph\u1ecfng v\u1ea5n Java\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tim_hieu_ky_ban_mo_ta_cong_viec_cong_ty_vi_tri_ma_minh_ung_tuyen\"><\/span><strong>T\u00ecm hi\u1ec3u k\u1ef9 b\u1ea3n m\u00f4 t\u1ea3 c\u00f4ng vi\u1ec7c, c\u00f4ng ty, v\u1ecb tr\u00ed m\u00e0 m\u00ecnh \u1ee9ng tuy\u1ec3n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>M\u1ed9t trong nh\u1eefng kinh nghi\u1ec7m quan tr\u1ecdng tr\u01b0\u1edbc khi \u0111i ph\u1ecfng v\u1ea5n Java, \u0111\u00f3 l\u00e0 b\u1ea1n ph\u1ea3i t\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 doanh nghi\u1ec7p v\u00e0 v\u1ecb tr\u00ed c\u00f4ng vi\u1ec7c m\u00e0 b\u1ea1n mu\u1ed1n \u1ee9ng tuy\u1ec3n. Ch\u1ec9 qua v\u00e0i c\u00fa click chu\u1ed9t m\u1ecdi th\u00f4ng tin \u0111\u00e3 hi\u1ec3n th\u1ecb h\u1ebft tr\u00ean internet, vi\u1ec7c n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c nh\u1eefng th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 doanh nghi\u1ec7p c\u0169ng s\u1ebd gi\u00fap b\u1ea1n ph\u1ea7n n\u00e0o \u0111\u00f3 c\u00f3 th\u00eam nh\u1eefng t\u01b0 li\u1ec7u c\u1ea7n thi\u1ebft \u0111\u1ec3 tr\u1ea3 l\u1eddi c\u00e1c <strong><a href=\"https:\/\/topviecit.vn\/blog\/cau-hoi-phong-van-lap-trinh-vien-java-co-ban\/\">c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n<\/a><\/strong>.\u00a0<\/p>\n\n\n\n<div class=\"wp-block-image is-style-default\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-21.png\" alt=\"T\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 c\u00f4ng ty m\u00e0 b\u1ea1n \u0111\u1ebfn ph\u1ecfng v\u1ea5n\" class=\"wp-image-1918\" width=\"800\" height=\"500\" title=\"T\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 c\u00f4ng ty m\u00e0 b\u1ea1n \u0111\u1ebfn ph\u1ecfng v\u1ea5n\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-21.png 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-21-640x400.png 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-21-768x480.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption><em>T\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 c\u00f4ng ty m\u00e0 b\u1ea1n \u0111\u1ebfn ph\u1ecfng v\u1ea5n<\/em><\/figcaption><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Chuan_bi_kien_thuc_chuyen_mon_vung\"><\/span><strong>Chu\u1ea9n b\u1ecb ki\u1ebfn th\u1ee9c chuy\u00ean m\u00f4n v\u1eefng&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Khi \u0111i ph\u1ecfng v\u1ea5n Java b\u1ea1n c\u0169ng c\u1ea7n t\u1ed5ng h\u1ee3p l\u1ea1i nh\u1eefng ki\u1ebfn th\u1ee9c, k\u1ef9 n\u0103ng m\u00e0 m\u00ecnh c\u00f3 c\u00f9ng v\u1edbi kinh nghi\u1ec7m l\u00e0m vi\u1ec7c. V\u1edbi nh\u1eefng th\u00e0nh t\u1ef1u n\u1ed5i b\u1eadt quan tr\u1ecdng trong c\u00f4ng vi\u1ec7c, trong qu\u00e1 tr\u00ecnh ph\u1ecfng v\u1ea5n, b\u1ea1n c\u0169ng n\u00ean chia s\u1ebb th\u1eb3ng th\u1eafn, trung th\u1ef1c v\u1edbi nh\u00e0 tuy\u1ec3n d\u1ee5ng.&nbsp;<\/p>\n\n\n\n<p>Ngo\u00e0i ra, \u0111\u1eebng qu\u00ean \u00f4n l\u1ea1i nh\u1eefng ki\u1ebfn th\u1ee9c chuy\u00ean m\u00f4n v\u1ec1 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh Java. \u0110i\u1ec1u n\u00e0y s\u1ebd gi\u00fap b\u1ea1n tr\u1edf n\u00ean t\u1ef1 tin h\u01a1n trong bu\u1ed5i ph\u1ecfng v\u1ea5n.\u00a0<\/p>\n\n\n\n<p><strong>>>>Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/co-nen-hoc-javascript-khong\/\">JavaScript l\u00e0 g\u00ec? C\u00f3 n\u00ean h\u1ecdc l\u1eadp tr\u00ecnh Javascript hay kh\u00f4ng?<\/a><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Giu_thai_do_chan_thanh_tu_tin_trong_khi_phong_van\"><\/span><strong>Gi\u1eef th\u00e1i \u0111\u1ed9 ch\u00e2n th\u00e0nh, t\u1ef1 tin trong khi ph\u1ecfng v\u1ea5n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>S\u1ef1 t\u1ef1 tin trong vi\u1ec7c tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi v\u00e0 \u1ee9ng x\u1eed t\u00ecnh hu\u1ed1ng m\u1ed9t c\u00e1ch th\u00f4ng minh, kh\u00e9o l\u00e9o s\u1ebd gi\u00fap b\u1ea1n ghi \u0111i\u1ec3m trong m\u1eaft nh\u00e0 tuy\u1ec3n d\u1ee5ng. Tuy nhi\u00ean, b\u1ea1n c\u0169ng c\u1ea7n gi\u1eef th\u00e1i \u0111\u1ed9 ch\u00e2n th\u00e0nh, l\u1eafng nghe nh\u1eefng chia s\u1ebb c\u1ee7a ng\u01b0\u1eddi ph\u1ecfng v\u1ea5n, \u0111\u1ed3ng th\u1eddi \u0111\u1eb7t c\u00e2u h\u1ecfi t\u01b0\u01a1ng t\u00e1c tr\u1edf l\u1ea1i khi c\u00f3 y\u00eau c\u1ea7u. S\u1ef1 c\u1ea7u th\u1ecb trong bu\u1ed5i ph\u1ecfng v\u1ea5n, mong mu\u1ed1n \u0111\u01b0\u1ee3c g\u1eafn b\u00f3, c\u1ed1ng hi\u1ebfn trong v\u1ecb tr\u00ed tuy\u1ec3n d\u1ee5ng s\u1ebd gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng v\u01b0\u1ee3t qua nh\u1eefng \u1ee9ng vi\u00ean kh\u00e1c.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Top_10_cau_hoi_phong_van_Java_thuong_gap\"><\/span><strong>Top 10 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java th\u01b0\u1eddng g\u1eb7p<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n <strong><a href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-java-la-gi\/\">l\u1eadp tr\u00ecnh vi\u00ean Java<\/a><\/strong> m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o tr\u01b0\u1edbc khi \u0111i ph\u1ecfng v\u1ea5n:\u00a0<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_1_Java_la_gi\"><\/span><strong>C\u00e2u 1: Java l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0110\u00e2y l\u00e0 c\u00e2u h\u1ecfi l\u00fd thuy\u1ebft \u0111\u01a1n gi\u1ea3n m\u00e0 b\u1ea5t k\u1ef3 l\u1eadp tr\u00ecnh vi\u00ean Java n\u00e0o c\u0169ng ph\u1ea3i n\u1eafm \u0111\u01b0\u1ee3c.&nbsp;<\/p>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 tr\u1ea3 l\u1eddi nh\u01b0 sau: Java l\u00e0 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh cao c\u1ea5p, h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9c l\u1eadp v\u1edbi n\u1ec1n t\u1ea3ng, l\u00e0 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh di \u0111\u1ed9ng, hi\u1ec7u su\u1ea5t cao. Ng\u00f4n ng\u1eef n\u00e0y \u0111\u01b0\u1ee3c s\u00e1ng t\u1ea1o v\u00e0 ph\u00e1t tri\u1ec3n v\u00e0o n\u0103m 1991 b\u1edfi James Gosling.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_2_Java_co_tinh_huong_doi_tuong_hoan_toan_khong\"><\/span><strong>C\u00e2u 2: Java c\u00f3 t\u00ednh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ho\u00e0n to\u00e0n kh\u00f4ng?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0110\u00e2y v\u1eabn l\u00e0 m\u1ed9t c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java kh\u00e1 l\u00fd thuy\u1ebft y\u00eau c\u1ea7u \u1ee9ng vi\u00ean tr\u1ea3 l\u1eddi th\u1eb3ng th\u1eafn, \u0111\u00fang v\u1ea5n \u0111\u1ec1. Tr\u00ean th\u1ef1c t\u1ebf, ng\u00f4n ng\u1eef Java kh\u00f4ng h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng ho\u00e0n to\u00e0n, n\u00f3 c\u00f3 s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u kh\u00f4ng ph\u1ea3i \u0111\u1ed1i t\u01b0\u1ee3ng nh\u01b0 char, byte, float,..&nbsp;<\/p>\n\n\n\n<div class=\"wp-block-image is-style-default\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-22.png\" alt=\"V\u1edbi nh\u1eefng c\u00e2u h\u1ecfi l\u00fd thuy\u1ebft h\u00e3y tr\u1ea3 l\u1eddi th\u1eb3ng v\u00e0o v\u1ea5n \u0111\u1ec1\" class=\"wp-image-1919\" title=\"V\u1edbi nh\u1eefng c\u00e2u h\u1ecfi l\u00fd thuy\u1ebft h\u00e3y tr\u1ea3 l\u1eddi th\u1eb3ng v\u00e0o v\u1ea5n \u0111\u1ec1\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-22.png 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-22-640x400.png 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-22-768x480.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption><em>V\u1edbi nh\u1eefng c\u00e2u h\u1ecfi l\u00fd thuy\u1ebft h\u00e3y tr\u1ea3 l\u1eddi th\u1eb3ng v\u00e0o v\u1ea5n \u0111\u1ec1<\/em><\/figcaption><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_3_Neu_mot_so_tinh_nang_noi_bat_cua_ngon_ngu_lap_trinh_Java\"><\/span><strong>C\u00e2u 3: N\u00eau m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh Java<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>V\u1edbi c\u00e2u h\u1ecfi l\u00fd thuy\u1ebft ti\u1ebfp theo n\u00e0y, b\u1ea1n n\u00ean tr\u1ea3 l\u1eddi \u00edt nh\u1ea5t 3 t\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a Java, \u0111\u00f3 l\u00e0 s\u1ef1 \u0111\u01a1n gi\u1ea3n, an to\u00e0n v\u00e0 t\u00ednh di \u0111\u1ed9ng r\u1ed3i ph\u00e2n t\u00edch m\u1ed9t ch\u00fat v\u1ec1 c\u00e1c t\u00ednh n\u0103ng n\u00e0y.<\/p>\n\n\n\n<p><strong>T\u00ednh \u0111\u01a1n gi\u1ea3n<\/strong>: Java l\u00e0 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh d\u1ec5 ti\u1ebfp c\u1eadn v\u00e0 h\u1ecdc t\u1eadp trong h\u1ec7 th\u1ed1ng c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh kh\u00e1c hi\u1ec7n nay. Nh\u1edd v\u1eady m\u00e0 t\u1ea5t c\u1ea3 c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ch\u00fang \u0111\u1ec3 x\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng.&nbsp;<\/p>\n\n\n\n<p><strong>T\u00ednh an to\u00e0n<\/strong>: Nh\u1edd c\u00f3 tr\u00ecnh th\u00f4ng d\u1ecbch JVM n\u00ean ng\u00f4n ng\u1eef Java \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 m\u1ed9t trong nh\u1eefng ng\u00f4n ng\u1eef an to\u00e0n, c\u00f3 t\u00ednh b\u1ea3o m\u1eadt cao nh\u1ea5t.&nbsp;<\/p>\n\n\n\n<p><strong>T\u00ednh di \u0111\u1ed9ng<\/strong>: Nguy\u00ean t\u1eafc c\u1ee7a Java \u201cVi\u1ebft m\u1ed9t l\u1ea7n, ch\u1ea1y \u0111\u01b0\u1ee3c \u1edf b\u1ea5t c\u1ee9 \u0111\u00e2u\u201d, b\u1edfi v\u1eady l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 d\u00f9ng ng\u00f4n ng\u1eef n\u00e0y vi\u1ebft \u1edf m\u1ecdi m\u00e1y t\u00ednh m\u00e0 m\u00ecnh y\u00eau th\u00edch.\u00a0<\/p>\n\n\n\n<p><strong>>>>Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/nhung-cau-hoi-phong-van-lap-trinh-vien-hay-gap-nhat\/\">Kh\u00e1m ph\u00e1 nh\u1eefng c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n l\u1eadp tr\u00ecnh vi\u00ean hay g\u1eb7p nh\u1ea5t<\/a><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_4_Su_khac_biet_giua_JDK_JVM_va_JRE_nhu_the_nao\"><\/span><strong>C\u00e2u 4: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa JDK, JVM v\u00e0 JRE nh\u01b0 th\u1ebf n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java kh\u00e1 n\u00e2ng cao, tuy nhi\u00ean kh\u00f4ng th\u1ec3 l\u00e0m kh\u00f3 nh\u1eefng ng\u01b0\u1eddi l\u00e0m l\u1eadp tr\u00ecnh l\u00e2u n\u0103m.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>JDK l\u00e0 c\u00f4ng c\u1ee5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u00ean d\u1ecbch c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh&nbsp;<\/li><li>JVM l\u00e0 m\u00e1y \u1ea3o Java \u0111\u01b0\u1ee3c d\u00f9ng nh\u1eb1m x\u00e2y d\u1ef1ng m\u00f4i tr\u01b0\u1eddng l\u00fd t\u01b0\u1edfng cho Java bytecode ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c nh\u1ea5t.<\/li><li>JRE&nbsp; l\u00e0 m\u00f4i tr\u01b0\u1eddng do JVM t\u1ea1o ra \u0111\u1ec3 Java bytecode ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_5_Lam_sao_de_phan_biet_lop_truu_tuong_voi_giao_dien\"><\/span><strong>C\u00e2u 5: L\u00e0m sao \u0111\u1ec3 ph\u00e2n bi\u1ec7t l\u1edbp tr\u1eebu t\u01b0\u1ee3ng v\u1edbi giao di\u1ec7n?&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>L\u1edbp tr\u1eebu t\u01b0\u1ee3ng v\u00e0 giao di\u1ec7n \u0111\u01b0\u1ee3c ph\u00e2n bi\u1ec7t d\u1ef1a tr\u00ean m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sau \u0111\u00e2y:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>L\u1edbp tr\u1eebu t\u01b0\u1ee3ng c\u00f3 th\u1ec3 tri\u1ec3n khai b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c kh\u00e1c nhau, trong khi \u0111\u00f3 giao di\u1ec7n kh\u00f4ng c\u00f3 t\u00ednh n\u0103ng n\u00e0y<\/li><li>Trong khi m\u1ed9t l\u1edbp con ch\u1ec9 c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng m\u1ed9t l\u1edbp tr\u1eebu t\u01b0\u1ee3ng ho\u1eb7c c\u1ee5 th\u1ec3 duy nh\u1ea5t. C\u00f2n giao di\u1ec7n th\u00ec c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng ho\u1eb7c th\u1ef1c hi\u1ec7n nhi\u1ec1u giao di\u1ec7n kh\u00e1c nhau.&nbsp;<\/li><li>L\u1edbp tr\u1eebu t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n h\u1eb1ng s\u1ed1, th\u00e0nh vi\u00ean, s\u01a1 khai ph\u01b0\u01a1ng th\u1ee9c, ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. Trong khi \u0111\u00f3, giao di\u1ec7n ch\u1ec9 ch\u1ee9a h\u1eb1ng s\u1ed1 v\u00e0 s\u01a1 \u0111\u1ed3 ph\u01b0\u01a1ng th\u1ee9c.<\/li><li>V\u1edbi l\u1edbp tr\u1eebu t\u01b0\u1ee3ng, ph\u01b0\u01a1ng th\u1ee9c v\u00e0 th\u00e0nh vi\u00ean c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a v\u1edbi b\u1ea5t c\u1ee9 m\u1ee9c \u0111\u1ed9 hi\u1ec3n th\u1ecb n\u00e0o. C\u00f2n giao di\u1ec7n, ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 c\u00f4ng khai theo m\u1eb7c \u0111\u1ecbnh.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_6_Phan_biet_Path_va_Classpath_Variables\"><\/span><strong>C\u00e2u 6: Ph\u00e2n bi\u1ec7t Path v\u00e0 Classpath Variables&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Path \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 m\u1ed9t bi\u1ebfn \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u1ecbnh v\u1ecb c\u00e1c t\u1ec7p th\u1ef1c thi. Do \u0111\u00f3, khi c\u00e0i \u0111\u1eb7t Java s\u1ebd c\u1ea7n th\u00eam v\u1ecb tr\u00ed th\u01b0 m\u1ee5c v\u00e0o Path variable. H\u00e0nh \u0111\u1ed9ng n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng gi\u00fap h\u1ec7 \u0111i\u1ec1u h\u00e0nh ki\u1ec3m so\u00e1t m\u1ecdi th\u1ef1c thi.<\/li><li>Classpath Variables \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi m\u1ee5c \u0111\u00edch \u0111\u1ecbnh v\u1ecb v\u1ecb tr\u00ed c\u1ee7a c\u00e1c t\u1ec7p l\u1edbn trong th\u01b0 m\u1ee5c, bao g\u1ed3m m\u1ed9t th\u01b0 m\u1ee5c, t\u1ec7p Zip ho\u1eb7c Jar \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t trong \u1ee9ng d\u1ee5ng Java.<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image is-style-default\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-23.png\" alt=\"C\u00e2u h\u1ecfi d\u1ea1ng ph\u00e2n bi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c h\u1ecfi nhi\u1ec1u trong ph\u1ecfng v\u1ea5n Java \" class=\"wp-image-1920\" title=\"C\u00e2u h\u1ecfi d\u1ea1ng ph\u00e2n bi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c h\u1ecfi nhi\u1ec1u trong ph\u1ecfng v\u1ea5n Java \" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-23.png 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-23-640x400.png 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/05\/image-23-768x480.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption><em>C\u00e2u h\u1ecfi d\u1ea1ng ph\u00e2n bi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c h\u1ecfi nhi\u1ec1u trong ph\u1ecfng v\u1ea5n Java\u00a0<\/em><\/figcaption><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_7_%E2%80%9CGarbage_Collection%E2%80%9D_dung_lam_gi\"><\/span><strong>C\u00e2u 7: \u201cGarbage Collection\u201d d\u00f9ng l\u00e0m g\u00ec?&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0110\u00e2y l\u00e0 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java n\u00e0y kh\u00e1 \u0111\u01a1n gi\u1ea3n. C\u00f4ng d\u1ee5ng c\u1ee7a Garbage Collection l\u00e0 x\u00e1c \u0111\u1ecbnh v\u00e0 lo\u1ea1i b\u1ecf c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng c\u1ea7n thi\u1ebft nh\u1eb1m gi\u1ea3i ph\u00f3ng b\u1ed9 nh\u1edb, t\u1ea1o kh\u00f4ng gian ph\u00f9 h\u1ee3p \u0111\u1ec3 c\u00e1c t\u00ednh n\u0103ng kh\u00e1c \u0111\u01b0\u1ee3c ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_8_Neu_su_khac_biet_giua_Jar_va_WAR\"><\/span><strong>C\u00e2u 8: N\u00eau s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa Jar v\u00e0 WAR&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>C\u00e2u h\u1ecfi n\u00e0y kh\u00e1 hi\u1ebfm g\u1eb7p trong ph\u1ecfng v\u1ea5n Java, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e2u tr\u1ea3 l\u1eddi nh\u01b0 sau: JAR l\u00e0 b\u1ea3n \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a c\u00e1c file Java, c\u00e1c file n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef chung trong m\u1ed9t JAR thay th\u1ebf cho th\u01b0 vi\u1ec7n.&nbsp;<\/p>\n\n\n\n<p>C\u00f2n WAR c\u00f3 b\u1ea3n \u0111\u1ea7y \u0111\u1ee7 Web Archive Files, ch\u1ee9a nhi\u1ec1u XML, Java Servlet page,.. \u0111\u01b0\u1ee3c d\u00f9ng cho c\u00e1c \u1ee9ng d\u1ee5ng web.&nbsp;<\/p>\n\n\n\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi <strong>ph\u1ecfng v\u1ea5n Java<\/strong> ph\u1ed5 bi\u1ebfn, hy v\u1ecdng \u0111\u00e3 gi\u00fap b\u1ea1n c\u00f3 th\u00eam kinh nghi\u1ec7m khi \u0111i ph\u1ecfng v\u1ea5n v\u1ecb tr\u00ed <a href=\"https:\/\/www.topcv.vn\/tim-viec-lam-java\"><strong>vi\u1ec7c l\u00e0m Java<\/strong><\/a>. Ngo\u00e0i vi\u1ec7c trang b\u1ecb nh\u1eefng ki\u1ebfn th\u1ee9c c\u1ea7n thi\u1ebft, b\u1ea1n c\u0169ng c\u1ea7n chu\u1ea9n b\u1ecb s\u1ef1 t\u1ef1 tin \u0111\u1ec3 th\u1ec3 hi\u1ec7n n\u0103ng l\u1ef1c c\u1ee7a b\u1ea3n th\u00e2n v\u00e0 chinh ph\u1ee5c nh\u00e0 tuy\u1ec3n d\u1ee5ng.<\/p>\n\n\n\n<p><strong>>>>Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/junit-la-gi\/\">JUnit l\u00e0 g\u00ec? T\u1ed5ng h\u1ee3p to\u00e0n b\u1ed9 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 JUnit<\/a><\/strong><\/p>\n\n\n\n<p class=\"has-text-align-right\"><em>H\u00ecnh \u1ea3nh: S\u01b0u t\u1ea7m<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u01b0\u1edbc v\u00e0o cu\u1ed9c ph\u1ecfng v\u1ea5n vi\u1ec7c l\u00e0m n\u00f3i chung v\u00e0 ph\u1ecfng v\u1ea5n Java n\u00f3i ri\u00eang, nhi\u1ec1u ng\u01b0\u1eddi lo l\u1eafng kh\u00f4ng bi\u1ebft m\u00ecnh c\u1ea7n chu\u1ea9n b\u1ecb nh\u1eefng g\u00ec \u0111\u1ec3 \u0111\u01b0\u1ee3c tuy\u1ec3n d\u1ee5ng. Trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y, topviecit.vn s\u1ebd g\u1ee3i \u00fd cho b\u1ea1n m\u1ed9t s\u1ed1 kinh nghi\u1ec7m v\u00e0 c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n Java ph\u1ed5 bi\u1ebfn nh\u1ea5t [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":1917,"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":[454,456,453,455],"class_list":["post-1916","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chia-se-kinh-nghiem","tag-cau-hoi-phong-van-java-nang-cao","tag-kinh-nghiem-phong-van","tag-nhung-cau-hoi-phong-van-java","tag-phong-van-thuc-tap-java"],"yoast_head":"<!-- This site is optimized with the 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