年终盘点 | 2019年Java面试题汇总篇(附答案)

￡神魔★判官ぃ 2023-10-06 11:25 42阅读 0赞

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作者 | 老王

来源 | Java中文社群「微信公众号」

在这岁月更替辞旧迎新的时刻，老王盘点了一下自己 2019 年发布的所有文章，意外的发现关于「Java面试」的主题文章，竟然发布了 52 篇，几乎是全年每周一篇面试文章的节奏，当然其中有不少的面试题来源于网络，但这些面试题都是经过我细心甄选的经典内容，只有我觉着对读者可能有帮助的面试文章才会被我「搬运」发布，所以在这个特殊的日子，我决定把这些面试题做一个汇总，方便读者集中阅读和收藏保存，Java 面试题汇总信息如下（附详细答案）。

1.  [面试官 | Nginx 是什么？有什么作用？][_ Nginx]  
    
2.  [面试官 | 为什么用了索引之后，查询就会变快？][Link 1]  
    
3.  [面试官 | Java 对象不使用时为什么要赋值为 null？][_ Java _ null]
4.  [美团面试题 | JVM 堆内存溢出后，其他线程是否可继续工作？][_ JVM]
5.  [面试官 | 说一下 JVM 常用参数有哪些？][_ _ JVM]
6.  [面试官 | 说一下什么是代理模式？][Link 2]
7.  [面试官 | AJAX请求为什么不安全？][_ AJAX]
8.  [经典面试题|ConcurrentHashMap 读操作为什么不需要加锁？][ConcurrentHashMap]
9.  [面试官问：一个Java字符串中到底能有多少个字符?][Java]
10. [面试官 | JVM 为什么使用元空间替换了永久代？][_ JVM 1]  
    
11. [面试官 | 说一下数据库如何分库分表？][Link 3]
12. [面试官 | 讲一下如何给高并发系统做限流？][Link 4]
13. [面试官：为什么 Spring 中的 bean 默认为单例？][Spring _ bean]
14. [面试官：HTTPS 为什么是安全的？说一下他的底层实现原理？][HTTPS]
15. [被一个熟悉的面试题问懵了：StringBuilder 为什么线程不安全？][StringBuilder]
16. [拼多多面试|如何用 Redis 统计独立用户访问量？][Redis]
17. [面试官：使用SpringBoot如何开发邮件发送系统？][SpringBoot]
18. [面试官：聊一下你对MySQL索引的理解？][MySQL]
19. [面试官：如何实现幂等性校验？][Link 5]
20. [如何有效的准备Java面试？][Java 1]
21. [如何手撸一个队列？队列详解和面试题汇总(含答案)][Link 6]
22. [面试题：如何设计一个高并发的系统？][Link 7]
23. [面试题：图解深克隆和浅克隆][Link 8]
24. [秋招注意事项和面试通关攻略][Link 9]
25. [面试官：数据量大的情况下分页查询很慢，有什么优化方案？][Link 10]
26. [面试珍藏：最常见的200多道Java面试题(2019年最新版)][200_Java_2019]
27. [面试题：聊一聊设计模式的基本原则][Link 11]
28. [我被面试官给虐懵了，竟然是因为我不懂Spring中的@Configuration][Spring_Configuration]
29. [面试官：谈谈数据库连接池的原理][Link 12]
30. [经典面试题 | 讲一下垃圾回收器都有哪些？][Link 13]
31. [面试干货 | Java 能否自定义一个类叫 java.lang.System？][_ Java _ java.lang.System]
32. [面试官：聊一下二分法][Link 14]
33. [阿里面试，我挂在了第四轮……][Link 15]
34. [经典面试题：聊一聊垃圾回收算法][Link 16]
35. [面试题：彻底搞懂 Cookie 和 Session][Cookie _ Session]
36. [【面试收藏】Redis最全面试题][Redis 1]
37. [面试官问你MySQL的优化，看这篇文章就够了][MySQL 1]
38. [经典面试题：如何保证缓存与数据库的双写一致性？][Link 17]
39. [面试官：讲一下Jvm中如何判断对象的生死？][Jvm]
40. [面试官：不使用synchronized和lock，如何实现一个线程安全的单例？][synchronized_lock]
41. [面试必备的分布式事物方案][Link 18]
42. [面试题：为什么Java中的字符串对象是不可变的][Java 2]
43. [经典面试题|讲一讲JVM的组成][JVM]
44. [记一次蚂蚁金服的面试经历][Link 19]
45. [Kafka面试题全套整理 | 划重点要考！][Kafka_ _]
46. [阿里面试题BIO和NIO数量问题附答案和代码][BIO_NIO]
47. [Java 200+ 面试题补充③ Dubbo 模块][Java 200_ _ Dubbo]
48. [Java 200+ 面试题补充② Netty 模块][Java 200_ _ Netty]
49. [Java 200+ 面试题补充 ThreadLocal 模块][Java 200_ _ ThreadLocal]
50. [90% 的人都会答错的面试题 == 和 equals 的区别][90_ _ _ _ equals]
51. [面试经验分享|精华版][Link 20]
52. [程序员专属精品简历合集—面试必备][Link 21]

【END】

近期热文

*  [面试珍藏：最常见的200多道Java面试题][200_Java_2019]
 *  [被一个熟悉的面试题问懵了：String...][StringBuilder]
 *  [面试官：][Link 22][如何实现幂等性校验？][Link 5]

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[Java 2]: http://mp.weixin.qq.com/s?__biz=MzU1NTkwODE4Mw%3D%3D&chksm=fbcc6f00ccbbe6169fd3bc145fa70fadb745d3811ae2bfd19efb4eb5830dc6b561f2e6d378d1&idx=1&mid=2247483960&scene=21&sn=151299e95b3edd1743a9c411ac1a9be5#wechat_redirect
[JVM]: https://blog.csdn.net/sufu1065/article/details/89173818
[Link 19]: http://mp.weixin.qq.com/s?__biz=MzU1NTkwODE4Mw%3D%3D&chksm=fbcc6f7dccbbe66bac3b5b14279673c69fb1bca45b2a3a3a6b4e2f867654f4c26089430e94b7&idx=1&mid=2247483973&scene=21&sn=17d6a6b986a0c7262225e53525dc7582#wechat_redirect
[Kafka_ _]: http://mp.weixin.qq.com/s?__biz=MzU1NTkwODE4Mw%3D%3D&chksm=fbcc6f71ccbbe6675f64b7c8ba94a3fab99ac376932eecaf6e82c15cea864ce6a581fa87a7bb&idx=1&mid=2247483977&scene=21&sn=ba3fbf40b8bb7328343bf3ae3946e3d8#wechat_redirect
[BIO_NIO]: https://blog.csdn.net/sufu1065/article/details/88599409
[Java 200_ _ Dubbo]: https://blog.csdn.net/sufu1065/article/details/88413938
[Java 200_ _ Netty]: https://blog.csdn.net/sufu1065/article/details/88327169
[Java 200_ _ ThreadLocal]: https://blog.csdn.net/sufu1065/article/details/88282310
[90_ _ _ _ equals]: http://mp.weixin.qq.com/s?__biz=MzU1NTkwODE4Mw%3D%3D&chksm=fbcc6f62ccbbe674a3ab55df01d636dfe32c18f7d9fdba30dba9d672d721f6bdfb69eeb2eda2&idx=1&mid=2247483994&scene=21&sn=95367111e6a0566d21f7ea756250d95e#wechat_redirect
[Link 20]: http://mp.weixin.qq.com/s?__biz=MzU1NTkwODE4Mw%3D%3D&chksm=fbcc6f63ccbbe675d1193909947fca51a54f5bce3ffbcf2c92b9db82d5a0fca8ac0d596d6e44&idx=1&mid=2247483995&scene=21&sn=b5941ed3aacec30d65c4cead1f2d2db4#wechat_redirect
[Link 21]: http://mp.weixin.qq.com/s?__biz=MzU1NTkwODE4Mw%3D%3D&chksm=fbcc6f66ccbbe670be4e465d4c88b99b5e265a0dec0825bf42094a678b1f5cf051eac044a003&idx=1&mid=2247483998&scene=21&sn=3b05a9e8399e917ab8035bb4c0d871a9#wechat_redirect
[Link 22]: https://blog.csdn.net/sufu1065/article/details/106417017
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