BATJ 2020 spring newest recruit 1000+ face questions summary, do not mention it away!

This paper collected the major plant N channel common interview questions, you want to have here covers:

Java、MyBatis、ZooKeeper、Dubbo、Elasticsearch、Memcached、Redis、MySQL、Spring、Spring Boot、Spring Cloud、RabbitMQ、Kafka、Linux等技术栈……

I hope everyone can find their own company, to open the code line and a happy heart.

As more questions amount of space limitations, face questions do not all share the article accompanied by a detailed analysis, but the finishing has become a detailed PDF documents can be shared with everyone, get free to receive the end the way

Look for interviews interview questions may be, it can be kind of thing he learned of the leak filled, more profound knowledge to understand some of the core

(End text attached interview answers)

MyBatis face questions

1. What is Mybatis?
2, Mybaits advantages:
3, MyBatis framework disadvantages:
4, MyBatis framework applicable occasions:
5, MyBatis with Hibernate What are the differences?
6. What is the difference between # {} and {} $ is?
7, when the field names in the entity class attribute name and the table is not the same, how do?
8, fuzzy query like how to write the statement?

ZooKeeper face questions

ZooKeeper is an open source distributed coordination service, created by Yahoo, Google Chubby is an open source implementation. Distributed applications can be realized based on ZooKeeper data such as publish / subscribe, load balancing, name services, distributed coordination / notification, cluster management, Master election, configuration maintenance, name services, distributed synchronization, distributed locking and distributed queues Features.

zookeeper nginx load balancing and load balancing difference
Zookeeper Watcher mechanism - data change notification
Watcher achieve client registration
How zookeeper is to ensure the consistency of the order of transactions?
Zookeeper watch monitor notice of nodes is permanent? Why is not permanent?
How to deal with zk node goes down?

Dubbo face questions

Spring Eureka 从开源转变为闭源，Consul 正在崛起，而 Dubbo 又开始重新更新。目前市场上仍有不少公司使用dubbo我们也需要继续学习。

为什么要用 Dubbo？
默认使用的是什么通信框架，还有别的选择吗?
服务调用是阻塞的吗？
一般使用什么注册中心？还有别的选择吗？
默认使用什么序列化框架，你知道的还有哪些？
Dubbo 的整体架构设计有哪些分层?

Elasticsearch 面试题

elasticsearch 了解多少，说说你们公司 es 的集群架构，索引数据大小，分片有多少，以及一些调优手段。
elasticsearch 索引数据多了怎么办，如何调优，部署
elasticsearch 是如何实现 master 选举的
Elasticsearch 在部署时，对 Linux 的设置有哪些优化方法
详细描述一下 Elasticsearch 更新和删除文档的过程。
Elasticsearch 在部署时，对 Linux 的设置有哪些优化方法？

(文末附面试答案)

Redis面试题

随着应用研发技术的不断成熟，Redis 缓存技术已经成为后台研发同学必备的能力之一。在很多公司面试的过程中，都必不可少地考察 Redis 知识点的掌握。

使用 Redis 有哪些好处？
Redis 是单进程单线程的？
Redis 的持久化机制是什么？各自的优缺点？
Redis 常见异常问题和解决方案（雪崩，穿透...）
redis 过期键的删除策略？
为什么 redis 需要把所有数据放到内存中？
Redis 集群的主从复制模型是怎样的？
Redis key 的过期时间和永久有效分别怎么设置？

MySQL 面试题

如今互联网行业用的最多就是 MySQL，然而对于高级 Web 面试者，尤其对于寻找 30k 下工作的求职者，很多 MySQL 相关知识点基本都会涉及，如果面试中，你的相关知识答的模糊和不切要点，基本大多稍好公司的面试官，基本也不会对你有兴趣，毕竟稍微量大的项目，最终都会让你去深入数据库，而且最终的大多瓶颈首先也会出现在数据库。