面试都看那些

1 Mysql面试大全
https://www.cnblogs.com/cxiaocai/p/11634257.html
2 JVM虚拟机面试大全
https://www.cnblogs.com/cxiaocai/p/11634918.html
3 HashMap和Hashtable有什么区别及线程初探
https://www.cnblogs.com/cxiaocai/p/11081041.html