1. The role of the Java virtual machine
2. Jvm garbage collection mechanism, which objects he wants to recycle, when and how to recycle
3. Introduction of MinorGC and FullGC
4. What aspects of fullgc should consider positioning when frequent occurrences of online logs
https://blog.csdn.net/weixin_39787792/article/details/110659173
5. Talk about the advantages of the spring framework
6. Used springboot and springcloud framework
7. Is there a unified dispatch center to manage each service of your company?
8. Types of transaction management supported by spring
9. The general principle of redis distributed lock
https://zhuanlan.zhihu.com/p/150602212
10. Online redis cluster mode
https://blog.csdn.net/zhangge3663/article/details/106617273
https://www.cnblogs.com/zhonglongbo/p/13128955.html
https://www.jianshu.com/p/d240af4a671c
11. Redis memory elimination mechanism
12. Expiration delete strategy
https://www.zhihu.com/question/396791243
http://www.likecs.com/show-66988.html
13. Do you use redis affairs?
https://cloud.tencent.com/developer/article/1189074
14. What are the characteristics of mysql storage engine X
https://blog.csdn.net/weixin_42606421/article/details/109501959
https://www.cnblogs.com/holm/p/12984760.html
15. MySQL transaction isolation level, what problems are solved respectively
16. Sub-database sub-table, horizontal split and vertical split
17. Introduce the master-slave replication of mysql
https://blog.51cto.com/superpcm/2094958
18.Linux common commands
19. Let's talk about thread pool
20.threadLoacl
21.tcp and udp protocol
22. The difference between http and https, the disadvantages of https
23. Common sorting algorithms
24. What are the processing methods when a hash conflict occurs in the hash table?
https://blog.csdn.net/weixin_41910694/article/details/96359964
https://blog.csdn.net/wxy941011/article/details/80740716
1.How to use interceptor in springMVC
https://www.iteye.com/blog/elim-1750680
Two or three things about locking in java
https://tech.meituan.com/2018/11/15/java-lock.html
https://blog.csdn.net/u012834750/article/details/69398216
3. Common sorting algorithms
https://blog.csdn.net/weixin_41190227/article/details/86600821