1. G1算法(和cms区别)：
https://www.jianshu.com/p/671ab8535d82
2、系统频繁full GC如何排查
https://www.jianshu.com/p/434120549ebb
3、讲讲java的并发
4、sy实现系统一点，轻量级锁是什么锁？讲实际的东西，偏向锁
https://www.jianshu.com/p/7c5e28d839bb
5、核心线程池20，基础线程池200，工作队列2000，拒绝策略的参数5000，qps从1线性涨到5000，用的arrayblockingquene.如何建这样的线程池?
arrayblockingquene：https://www.jianshu.com/p/3c2e0671a7a3
https://www.jianshu.com/p/bc9005ad40c9
6.NIO,讲一下channel
https://www.jianshu.com/p/a869c406e0ce
7.零拷贝
https://www.jianshu.com/p/81ca0d45d57f
8.java锁，可重入锁
https://www.jianshu.com/p/8403206e8e8d
9.spring用的多嘛，springboot启动过程
https://www.jianshu.com/p/0b05e01fc12b
10.分布式事务，两阶段和三阶段区别
https://www.jianshu.com/p/03da377fe115
https://www.jianshu.com/p/abe669d72db9
https://www.jianshu.com/p/24fafe4127c7
11.联合索引怎么工作？
https://www.jianshu.com/p/39c489ac8713
（有问题）https://www.jianshu.com/p/3b0532d215b5
12.主键索引和唯一索引区别
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