{"id":30806,"date":"2026-10-19T08:45:00","date_gmt":"2026-10-19T01:45:00","guid":{"rendered":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/?p=30806"},"modified":"2026-10-19T16:30:23","modified_gmt":"2026-10-19T09:30:23","slug":"cau-hoi-phong-van-lap-trinh-vien-java","status":"publish","type":"post","link":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/phong-van-viec-lam\/cau-hoi-phong-van-lap-trinh-vien-java","title":{"rendered":"C\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n l\u1eadp tr\u00ecnh vi\u00ean Java: ng\u01b0\u1eddi ph\u1ecfng v\u1ea5n \u0111\u00e0o s\u00e2u \u0111i\u1ec1u g\u00ec?"},"content":{"rendered":"

\u1ee8ng vi\u00ean Java \u00f4n k\u1ef9 \u0111\u1ecbnh ngh\u0129a OOP hay Collections nh\u01b0ng v\u1eabn l\u00fang t\u00fang khi b\u1ecb h\u1ecfi ti\u1ebfp \u201cv\u00ec sao\u201d. B\u00e0i vi\u1ebft gom c\u00e1c c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n l\u1eadp tr\u00ecnh vi\u00ean Java<\/strong> theo nh\u00f3m ki\u1ebfn th\u1ee9c: Core Java, \u0111a lu\u1ed3ng, JVM, Spring Boot, JPA\/Hibernate v\u00e0 SQL. M\u1ed7i c\u00e2u n\u00eau r\u00f5 nh\u00e0 tuy\u1ec3n d\u1ee5ng mu\u1ed1n ki\u1ec3m tra g\u00ec c\u00f9ng \u00fd ch\u00ednh n\u00ean tr\u1ea3 l\u1eddi, ph\u00e2n theo c\u1ea5p fresher, junior v\u00e0 middle.<\/p>\n

\"c\u00e2u<\/p>\n

\n

T\u1ed5ng quan nhanh<\/strong><\/p>\n

\u2013 Ng\u01b0\u1eddi ph\u1ecfng v\u1ea5n th\u01b0\u1eddng h\u1ecfi ti\u1ebfp \u201cv\u00ec sao\u201d sau m\u1ed7i \u0111\u1ecbnh ngh\u0129a.<\/p>\n

\u2013 Core Java v\u00e0 Collections \u0111\u01b0\u1ee3c h\u1ecfi \u1edf c\u1ea3 ba c\u1ea5p \u0111\u1ed9.<\/p>\n

\u2013 Spring Boot, JPA v\u00e0 SQL xu\u1ea5t hi\u1ec7n nhi\u1ec1u t\u1eeb c\u1ea5p junior.<\/p>\n

\u2013 M\u1ed9t l\u1ed7i production k\u1ec3 r\u00f5 r\u00e0ng ph\u00e2n bi\u1ec7t junior v\u1edbi middle.<\/p>\n

C\u00e1c ph\u1ea7n d\u01b0\u1edbi \u0111i l\u1ea7n l\u01b0\u1ee3t qua b\u1ed1n \u0111i\u1ec3m n\u00e0y.<\/p>\n<\/div>\n

1. V\u00ec sao ng\u01b0\u1eddi ph\u1ecfng v\u1ea5n Java h\u1ecfi \u201cv\u00ec sao\u201d nhi\u1ec1u h\u01a1n \u201cl\u00e0 g\u00ec\u201d?<\/h2>\n

\u0110\u1ecbnh ngh\u0129a encapsulation h\u1ecdc thu\u1ed9c \u0111\u01b0\u1ee3c trong m\u1ed9t bu\u1ed5i t\u1ed1i. C\u00e2u h\u1ecfi th\u1eadt \u0111\u1ebfn ngay sau: v\u00ec sao HashMap kh\u00f4ng an to\u00e0n khi nhi\u1ec1u lu\u1ed3ng c\u00f9ng ghi, v\u00ec sao Spring d\u00f9ng ti\u00eam ph\u1ee5 thu\u1ed9c (Dependency Injection) thay v\u00ec new. H\u00e3y tr\u1ea3 l\u1eddi theo ba l\u1edbp: kh\u00e1i ni\u1ec7m, l\u00fd do thi\u1ebft k\u1ebf v\u00e0 t\u00ecnh hu\u1ed1ng \u0111\u00e3 g\u1eb7p.<\/p>\n

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C\u00e2u tr\u1ea3 l\u1eddi \u201cl\u00e0 g\u00ec\u201d gi\u00fap b\u1ea1n kh\u00f4ng b\u1ecb lo\u1ea1i, c\u00f2n c\u00e2u tr\u1ea3 l\u1eddi \u201cv\u00ec sao\u201d m\u1edbi gi\u00fap b\u1ea1n \u0111\u01b0\u1ee3c ch\u1ecdn.<\/em><\/p>\n<\/blockquote>\n

M\u00f4 t\u1ea3 c\u00f4ng vi\u1ec7c c\u1ee7a ngh\u1ec1 c\u00f3 trong b\u00e0i L\u1eadp tr\u00ecnh vi\u00ean Java l\u00e0 g\u00ec? M\u00f4 t\u1ea3 c\u00f4ng vi\u1ec7c, k\u1ef9 n\u0103ng v\u00e0 l\u1ed9 tr\u00ecnh ph\u00e1t tri\u1ec3n<\/a>.<\/p>\n

2. C\u00e2u h\u1ecfi Core Java: OOP, Collections, Generics v\u00e0 Java hi\u1ec7n \u0111\u1ea1i<\/h2>\n

\u0110\u00e2y l\u00e0 n\u1ec1n m\u00f3ng c\u1ee7a m\u1ecdi bu\u1ed5i ph\u1ecfng v\u1ea5n L\u1eadp tr\u00ecnh vi\u00ean Java (Java Developer), s\u1eafp theo c\u1ea5p \u0111\u1ed9 \u1edf b\u1ea3ng d\u01b0\u1edbi.<\/p>\n\n\n\n\n\n\n\n
C\u00e2u h\u1ecfi<\/th>\nC\u1ea5p<\/th>\nNh\u00e0 tuy\u1ec3n d\u1ee5ng ki\u1ec3m tra<\/th>\n\u00dd ch\u00ednh c\u1ea7n tr\u1ea3 l\u1eddi<\/th>\n<\/tr>\n
Abstract class kh\u00e1c interface th\u1ebf n\u00e0o?<\/td>\nFresher<\/td>\nCh\u1ecdn \u0111\u00fang c\u00f4ng c\u1ee5 tr\u1eebu t\u01b0\u1ee3ng<\/td>\nClass k\u1ebf th\u1eeba m\u1ed9t l\u1edbp nh\u01b0ng tri\u1ec3n khai nhi\u1ec1u interface; abstract class chia s\u1ebb \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i.<\/td>\n<\/tr>\n
V\u00ec sao String l\u00e0 immutable?<\/td>\nJunior<\/td>\nHi\u1ec3u b\u1ed9 nh\u1edb v\u00e0 an to\u00e0n d\u1eef li\u1ec7u<\/td>\nD\u00f9ng chung qua String pool, an to\u00e0n gi\u1eefa c\u00e1c lu\u1ed3ng, hashCode kh\u00f4ng \u0111\u1ed5i n\u00ean l\u00e0m kh\u00f3a Map an to\u00e0n.<\/td>\n<\/tr>\n
V\u00ec sao override equals th\u00ec ph\u1ea3i override hashCode?<\/td>\nJunior<\/td>\nH\u1ee3p \u0111\u1ed3ng c\u1ee7a HashMap, HashSet<\/td>\nHai \u0111\u1ed1i t\u01b0\u1ee3ng b\u1eb1ng nhau ph\u1ea3i c\u00f9ng hashCode, n\u1ebfu kh\u00f4ng HashMap kh\u00f4ng t\u00ecm th\u1ea5y ph\u1ea7n t\u1eed.<\/td>\n<\/tr>\n
V\u00ec sao HashMap kh\u00f4ng thread-safe?<\/td>\nJunior\u2013Middle<\/td>\nR\u1ee7i ro ch\u1ea1y \u0111\u1ed3ng th\u1eddi<\/td>\nNhi\u1ec1u lu\u1ed3ng c\u00f9ng ghi c\u00f3 th\u1ec3 m\u1ea5t d\u1eef li\u1ec7u; d\u00f9ng ConcurrentHashMap khi c\u1ea7n ghi \u0111\u1ed3ng th\u1eddi.<\/td>\n<\/tr>\n
Checked v\u00e0 unchecked exception kh\u00e1c nhau ra sao?<\/td>\nJunior<\/td>\nT\u01b0 duy x\u1eed l\u00fd l\u1ed7i<\/td>\nChecked bu\u1ed9c x\u1eed l\u00fd l\u00fac bi\u00ean d\u1ecbch, unchecked k\u1ebf th\u1eeba RuntimeException; n\u00eau try-with-resources.<\/td>\n<\/tr>\n<\/table>\n

V\u1edbi c\u00e2u HashMap, c\u1ea7n n\u00eau c\u1ea3 h\u1ec7 qu\u1ea3 v\u00e0 gi\u1ea3i ph\u00e1p. \u0110\u1ec3 xem doanh nghi\u1ec7p y\u00eau c\u1ea7u k\u1ef9 n\u0103ng Java n\u00e0o, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o vi\u1ec7c l\u00e0m CNTT – ph\u1ea7n m\u1ec1m<\/a> v\u00e0 \u0111\u1ed1i chi\u1ebfu v\u1edbi ph\u1ea7n \u0111ang \u00f4n.<\/p>\n

Java Generics<\/h3>\n

Java Generics cho ph\u00e9p tham s\u1ed1 h\u00f3a ki\u1ec3u \u0111\u1ec3 ki\u1ec3m tra l\u00fac bi\u00ean d\u1ecbch, n\u00ean ph\u1ecfng v\u1ea5n hay h\u1ecfi type erasure: ki\u1ec3u tham s\u1ed1 b\u1ecb x\u00f3a khi bi\u00ean d\u1ecbch, n\u00ean l\u00fac ch\u1ea1y danh s\u00e1ch String v\u00e0 danh s\u00e1ch Integer l\u00e0 c\u00f9ng m\u1ed9t class. C\u00e2u n\u1ed1i ti\u1ebfp l\u00e0 wildcard theo nguy\u00ean t\u1eafc PECS: `? extends T` khi ch\u1ec9 \u0111\u1ecdc ra, `? super T` khi ghi v\u00e0o.<\/p>\n

Stream API v\u00e0 lambda<\/h3>\n

Stream API x\u1eed l\u00fd t\u1eadp h\u1ee3p theo ki\u1ec3u khai b\u00e1o, c\u00f2n lambda l\u00e0 c\u00e1ch vi\u1ebft g\u1ecdn m\u1ed9t functional interface nh\u01b0 Predicate hay Function. Thao t\u00e1c trung gian nh\u01b0 filter, map ch\u1ea1y l\u01b0\u1eddi (lazy), ch\u1ec9 th\u1ef1c thi khi g\u1eb7p thao t\u00e1c k\u1ebft th\u00fac nh\u01b0 collect; stream \u0111\u00e3 k\u1ebft th\u00fac th\u00ec kh\u00f4ng d\u00f9ng l\u1ea1i \u0111\u01b0\u1ee3c.<\/p>\n

Record v\u00e0 sealed class<\/h3>\n

Record l\u00e0 class mang d\u1eef li\u1ec7u b\u1ea5t bi\u1ebfn, ch\u00ednh th\u1ee9c t\u1eeb Java 16 (JEP 395), \u0111\u01b0\u1ee3c tr\u00ecnh bi\u00ean d\u1ecbch t\u1ef1 sinh constructor, accessor, equals, hashCode v\u00e0 toString. Sealed class, ch\u00ednh th\u1ee9c t\u1eeb Java 17 (JEP 409), gi\u1edbi h\u1ea1n class \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba qua t\u1eeb kh\u00f3a permits.<\/p>\n

3. \u0110a lu\u1ed3ng, JVM v\u00e0 Garbage Collection \u1edf m\u1ee9c kh\u00e1i qu\u00e1t<\/h2>\n

C\u00e2u h\u1ecfi v\u1ec1 JVM v\u00e0 garbage collection th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u b\u1eb1ng ph\u00e2n bi\u1ec7t heap ch\u1ee9a \u0111\u1ed1i t\u01b0\u1ee3ng d\u00f9ng chung v\u1edbi stack ch\u1ee9a bi\u1ebfn c\u1ee5c b\u1ed9 c\u1ee7a t\u1eebng lu\u1ed3ng. Garbage Collection thu h\u1ed3i \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng c\u00f2n tham chi\u1ebfu, n\u00ean c\u00e2u \u201cv\u00ec sao v\u1eabn g\u1eb7p OutOfMemoryError\u201d ki\u1ec3m tra hi\u1ec3u bi\u1ebft v\u1ec1 r\u00f2 r\u1ec9 do gi\u1eef tham chi\u1ebfu th\u1eeba, nh\u01b0 cache t\u0129nh kh\u00f4ng x\u00f3a. Deadlock x\u1ea3y ra khi hai lu\u1ed3ng ch\u1edd kh\u00f3a c\u1ee7a nhau.<\/p>\n

Java Memory Model, volatile v\u00e0 synchronized<\/h3>\n

Java Memory Model (JMM) l\u00e0 b\u1ed9 quy t\u1eafc \u1edf ch\u01b0\u01a1ng 17 c\u1ee7a Java Language Specification, quy \u0111\u1ecbnh khi n\u00e0o gi\u00e1 tr\u1ecb m\u1ed9t lu\u1ed3ng ghi \u0111\u01b0\u1ee3c lu\u1ed3ng kh\u00e1c nh\u00ecn th\u1ea5y, d\u1ef1a tr\u00ean quan h\u1ec7 happens-before. Volatile ch\u1ec9 gi\u00fap thay \u0111\u1ed5i \u0111\u01b0\u1ee3c nh\u00ecn th\u1ea5y ngay nh\u01b0ng kh\u00f4ng l\u00e0m count++ th\u00e0nh nguy\u00ean t\u1eed, h\u1ee3p v\u1edbi c\u1edd d\u1eebng lu\u1ed3ng. Synchronized th\u00eam quy\u1ec1n \u0111\u1ed9c quy\u1ec1n cho m\u1ed9t lu\u1ed3ng, d\u00f9ng khi c\u1eadp nh\u1eadt nhi\u1ec1u b\u01b0\u1edbc nh\u01b0 c\u1ed9ng d\u1ed3n s\u1ed1 d\u01b0.<\/p>\n

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L\u01b0u \u00fd khi tr\u1ea3 l\u1eddi ph\u1ea7n \u0111a lu\u1ed3ng v\u00e0 JVM<\/strong><\/p>\n

\u2013 B\u1ea1n kh\u00f4ng n\u00ean n\u00eau t\u00ean b\u1ed9 thu gom khi ch\u01b0a ki\u1ec3m tra.<\/p>\n

\u2013 B\u1ea1n n\u00ean n\u00f3i r\u00f5 ph\u1ea7n n\u00e0o \u0111\u00e3 l\u00e0m th\u1eadt, ph\u1ea7n n\u00e0o m\u1edbi \u0111\u1ecdc.<\/p>\n

C\u00e1ch n\u00e0y gi\u00fap tr\u00e1nh b\u1ecb h\u1ecfi v\u1eb7n \u1edf chi ti\u1ebft ch\u01b0a ch\u1eafc.<\/p>\n<\/div>\n

4. Spring Boot, JPA\/Hibernate v\u00e0 SQL<\/h2>\n

Nhi\u1ec1u v\u1ecb tr\u00ed Java hi\u1ec7n nay l\u00e0m back-end v\u1edbi Spring Boot. C\u00e2u kinh \u0111i\u1ec3n l\u00e0 \u201cv\u00ec sao d\u00f9ng DI\u201d: class kh\u00f4ng t\u1ef1 t\u1ea1o ph\u1ee5 thu\u1ed9c m\u00e0 \u0111\u01b0\u1ee3c Spring ti\u00eam v\u00e0o, n\u00ean d\u1ec5 thay b\u1eb1ng b\u1ea3n gi\u1ea3 khi vi\u1ebft unit test. C\u00e2u n\u1ed1i ti\u1ebfp l\u00e0 v\u00ec sao ti\u00eam qua constructor thay v\u00ec @Autowired tr\u00ean field: ph\u1ee5 thu\u1ed9c r\u00f5 r\u00e0ng v\u00e0 khai b\u00e1o \u0111\u01b0\u1ee3c final.<\/p>\n

Spring Boot auto-configuration t\u1ef1 t\u1ea1o bean theo \u0111i\u1ec1u ki\u1ec7n nh\u01b0 @ConditionalOnClass v\u00e0 l\u00f9i l\u1ea1i nh\u1edd @ConditionalOnMissingBean khi b\u1ea1n \u0111\u00e3 t\u1ef1 khai b\u00e1o bean. Starter l\u00e0 g\u00f3i ph\u1ee5 thu\u1ed9c gom s\u1eb5n, v\u00ed d\u1ee5 spring-boot-starter-web k\u00e9o theo Spring MVC v\u00e0 Tomcat nh\u00fang. Actuator cung c\u1ea5p endpoint gi\u00e1m s\u00e1t nh\u01b0 \/actuator\/health.<\/p>\n

V\u1edbi JPA\/Hibernate v\u00e0 SQL, c\u00e1c c\u00e2u h\u1ecfi xoay quanh hi\u1ec7u n\u0103ng truy v\u1ea5n:<\/p>\n

\u2013 L\u1ed7i N+1 query x\u1ea3y ra khi t\u1ea3i danh s\u00e1ch r\u1ed3i truy v\u1ea5n t\u1eebng quan h\u1ec7 con ri\u00eang l\u1ebb.<\/p>\n

\u2013 Lazy loading ti\u1ebft ki\u1ec7m truy v\u1ea5n nh\u01b0ng d\u1ec5 g\u00e2y l\u1ed7i khi truy c\u1eadp ngo\u00e0i transaction.<\/p>\n

\u2013 @Transactional m\u1eb7c \u0111\u1ecbnh ch\u1ec9 rollback v\u1edbi RuntimeException ho\u1eb7c Error, checked exception c\u1ea7n c\u1ea5u h\u00ecnh rollbackFor.<\/p>\n

\u2013 Index gi\u00fap \u0111\u1ecdc nhanh h\u01a1n nh\u01b0ng l\u00e0m thao t\u00e1c ghi ch\u1eadm h\u01a1n v\u00e0 t\u1ed1n dung l\u01b0\u1ee3ng.<\/p>\n

B\u1ea1n n\u00ean t\u1ef1 vi\u1ebft \u0111\u01b0\u1ee3c truy v\u1ea5n c\u00f3 JOIN v\u00e0 GROUP BY, v\u00ec nhi\u1ec1u n\u01a1i ki\u1ec3m tra SQL thu\u1ea7n ch\u1ee9 kh\u00f4ng ch\u1ec9 qua ORM.<\/p>\n

5. B\u00e0i thi\u1ebft k\u1ebf API nh\u1ecf v\u00e0 v\u00f2ng live coding<\/h2>\n

Live coding Java th\u01b0\u1eddng l\u00e0 b\u00e0i v\u1eeba ph\u1ea3i nh\u01b0 \u0111\u1ebfm t\u1ea7n su\u1ea5t ph\u1ea7n t\u1eed b\u1eb1ng Map. Ng\u01b0\u1eddi ph\u1ecfng v\u1ea5n quan s\u00e1t c\u00e1ch ch\u1ecdn c\u1ea5u tr\u00fac d\u1eef li\u1ec7u v\u00e0 x\u1eed l\u00fd \u0111\u1ea7u v\u00e0o r\u1ed7ng. V\u1edbi c\u00e2u thi\u1ebft k\u1ebf REST API \u0111\u01a1n h\u00e0ng, h\u00e3y n\u00f3i v\u1ec1 endpoint, ph\u01b0\u01a1ng th\u1ee9c HTTP, m\u00e3 tr\u1ea1ng th\u00e1i v\u00e0 ph\u00e2n trang.<\/p>\n

\"c\u00e2u<\/p>\n

6. K\u1ec3 m\u1ed9t l\u1ed7i production: ranh gi\u1edbi gi\u1eefa junior v\u00e0 middle<\/h2>\n

C\u00e2u \u201ch\u00e3y k\u1ec3 m\u1ed9t l\u1ed7i production b\u1ea1n t\u1eebng x\u1eed l\u00fd\u201d xu\u1ea5t hi\u1ec7n th\u01b0\u1eddng xuy\u00ean t\u1eeb c\u1ea5p junior. Junior hay k\u1ec3 chung chung, c\u00f2n middle n\u00eau \u0111\u01b0\u1ee3c tri\u1ec7u ch\u1ee9ng, c\u00e1ch \u0111i\u1ec1u tra qua log hay thread dump v\u00e0 nguy\u00ean nh\u00e2n g\u1ed1c. V\u00ed d\u1ee5 ph\u00f9 h\u1ee3p l\u00e0 API ch\u1eadm d\u1ea7n do N+1 query. Fresher c\u00f3 th\u1ec3 k\u1ec3 l\u1ed7i trong \u0111\u1ed3 \u00e1n.<\/p>\n

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L\u1eddi khuy\u00ean<\/strong><\/p>\n

\u2013 B\u1ea1n h\u00e3y vi\u1ebft s\u1eb5n c\u00e2u chuy\u1ec7n l\u1ed7i: tri\u1ec7u ch\u1ee9ng, \u0111i\u1ec1u tra, nguy\u00ean nh\u00e2n, kh\u1eafc ph\u1ee5c.<\/p>\n

\u2013 B\u1ea1n n\u00ean n\u00eau th\u1eddi gian ph\u1ea3n h\u1ed3i tr\u01b0\u1edbc v\u00e0 sau khi s\u1eeda.<\/p>\n

\u2013 B\u1ea1n h\u00e3y chu\u1ea9n b\u1ecb \u00fd m\u00ecnh s\u1ebd l\u00e0m kh\u00e1c n\u1ebfu g\u1eb7p l\u1ea1i.<\/p>\n

S\u1ef1 c\u1ed1 t\u1eebng g\u1eb7p nh\u1edd \u0111\u00f3 th\u00e0nh b\u1eb1ng ch\u1ee9ng n\u0103ng l\u1ef1c.<\/p>\n<\/div>\n

7. C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

1. Fresher Java c\u00f3 c\u1ea7n bi\u1ebft Spring Boot tr\u01b0\u1edbc khi ph\u1ecfng v\u1ea5n?<\/em><\/strong> N\u00ean bi\u1ebft \u1edf m\u1ee9c t\u1ea1o REST API \u0111\u01a1n gi\u1ea3n, nh\u01b0ng Core Java v\u1eabn \u0111\u01b0\u1ee3c h\u1ecfi k\u1ef9 h\u01a1n.<\/p>\n

2. C\u00f3 n\u00ean \u00f4n thu\u1eadt to\u00e1n kh\u00f3 khi \u1ee9ng tuy\u1ec3n Java back-end?<\/em><\/strong> T\u00f9y doanh nghi\u1ec7p; ph\u1ea7n l\u1edbn \u1edf m\u1ee9c v\u1eeba ph\u1ea3i, n\u00ean \u01b0u ti\u00ean Collections.<\/p>\n

3. N\u00ean mang theo g\u00ec \u0111\u1ec3 minh h\u1ecda kinh nghi\u1ec7m?<\/em><\/strong> M\u1ed9t d\u1ef1 \u00e1n GitHub b\u1ea1n hi\u1ec3u r\u00f5 v\u00e0 m\u1ed9t c\u00e2u chuy\u1ec7n l\u1ed7i \u0111\u00e3 x\u1eed l\u00fd.<\/p>\n

Ph\u1ecfng v\u1ea5n Java l\u00e0 d\u1ecbp ch\u1ee9ng minh b\u1ea1n hi\u1ec3u c\u01a1 ch\u1ebf ch\u1ee9 kh\u00f4ng ch\u1ec9 nh\u1edb \u0111\u1ecbnh ngh\u0129a. Khi luy\u1ec7n c\u00e2u h\u1ecfi ph\u1ecfng v\u1ea5n l\u1eadp tr\u00ecnh vi\u00ean Java<\/strong>, h\u00e3y tr\u1ea3 l\u1eddi theo ba l\u1edbp kh\u00e1i ni\u1ec7m, l\u00fd do v\u00e0 tr\u1ea3i nghi\u1ec7m th\u1ef1c t\u1ebf, \u00f4n k\u1ef9 Core Java, Spring Boot, JPA c\u00f9ng SQL, v\u00e0 chu\u1ea9n b\u1ecb m\u1ed9t l\u1ed7i production c\u00f3 s\u1ed1 li\u1ec7u. H\u00e3y ch\u1ecdn m\u1ed9t c\u00e2u trong b\u1ea3ng v\u00e0 th\u1eed gi\u1ea3i th\u00edch th\u00e0nh ti\u1ebfng h\u00f4m nay.<\/p>\n

B\u00e0i vi\u1ebft mang t\u00ednh tham kh\u1ea3o; c\u00e2u h\u1ecfi th\u1ef1c t\u1ebf t\u00f9y doanh nghi\u1ec7p, chi ti\u1ebft k\u1ef9 thu\u1eadt n\u00ean \u0111\u1ed1i chi\u1ebfu t\u00e0i li\u1ec7u ch\u00ednh th\u1ee9c c\u1ee7a Java v\u00e0 Spring.<\/em><\/p>\n

Minh An<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

\u1ee8ng vi\u00ean Java \u00f4n k\u1ef9 \u0111\u1ecbnh ngh\u0129a OOP hay Collections nh\u01b0ng v\u1eabn l\u00fang t\u00fang khi b\u1ecb h\u1ecfi ti\u1ebfp \u201cv\u00ec sao\u201d. B\u00e0i vi\u1ebft gom c\u00e1c c\u00e2u …<\/p>\n","protected":false},"author":58,"featured_media":30784,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45],"tags":[],"class_list":["post-30806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-phong-van-viec-lam"],"_links":{"self":[{"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/posts\/30806","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/users\/58"}],"replies":[{"embeddable":true,"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/comments?post=30806"}],"version-history":[{"count":1,"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/posts\/30806\/revisions"}],"predecessor-version":[{"id":30807,"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/posts\/30806\/revisions\/30807"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/media\/30784"}],"wp:attachment":[{"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/media?parent=30806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/categories?post=30806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.careerlink.vn\/cam-nang-viec-lam\/wp-json\/wp\/v2\/tags?post=30806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}