Some say it is the only large enterprise or Internet companies to get the engineer. Yes, small companies or non-Internet companies are less likely to be thirty thousand farmers of the code. As well as regional issues, this is not within the scope of my consideration, because in addition to the north of Guangzhou-Shenzhen Hangzhou and other places difficult to reach.
In fact also mentioned wage is associated with the performance in the interview, also with other comprehensive level, for example, you are 985, TOP10, or graduate degree, but also understand the point or node, understand the point of big data, etc., or strong communication skills, strike the interviewer pain points are points. There are other excellent performance but also extra points on this basis. But pure JAVA respect of the treatment is more consistent. There really is not my SSH black, 3W level interviews rarely ask SSH knowledge, to ask also ask the architecture level as well as design patterns. For example MyBatis is .spring inside how to manage meetings and cache What you are familiar with design patterns, how you understand and applications.
In the BAT paying too common, usually a senior engineer and senior engineer positions. Ali is about P6~P7, in Baidu is about T5, Tencent is about T2-3, Jingdong is T3-1, the US group is about P6, the other I do not know. This level is their main farm code level, overtime, can solve most of the problems, but the overall capacity of the system architecture capabilities and in-depth analysis of bottlenecks still need to develop.
For example Alibaba recruitment standards
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1.Java solid foundation, understanding IO, multithreading, collections and other basic framework can be understood as familiar with J2SE, J2EE; have some understanding of the JVM principle, can be understood as to what is the JVM, JVM memory model and the data area of skilled JVM runtime grasp why the JVM to be classified as new generation, old time, permanent behalf of the other.
2. Have you ever used the open source framework to understand its principles and mechanisms; for Spring, ibatis familiar with open source framework used can be understood as the mainstream of SSM, a mesh frame, and read their source code to some extent, We can not stay on to write business code, otherwise you will never break through the technical bottleneck.
Master multi-threaded and high-performance design and coding, this requires some knowledge of concurrent programming, such as watching concurrent JMM from the perspective of knowing synchronization adverbial clause: Principles volitile keywords and so on.
Performance tuning can be interpreted as JVM, Tomcat, MySQL optimization;
With high concurrent application development experience, this is actually a summary distributed, for example, you used the zookeeper, dubbo, redis cache, nginx load balancing.
And then to have the best micro-service experience, such as Spring Boot, Spring Cloud and so on.
4. have a strong interest in technology ...... this is a requirement for soft power, that you positive, hard working, courage and hard work. This soft skills, in fact, there is on the one hand to examine your ability to learn to explore, for example, you have not studied the underlying netty-source implementation, there often write their own blog, often there is no activity on github, better to do some contribution.
Has done a large-scale project technology PLA / PM is preferred. This sentence is a plus to consider sub-item on your ability and experience.
Summarize summarize you need to have a comprehensive knowledge of Internet technology:
Speaking of knowledge from the ground up, in response to MongoDB you at least have a deep understanding of MySQL and Redis, of, Nginx, etc. of the Tomcat, RPC, JMS and other aspects.
When we talk about technical strength, in the end in what we talk about? You need to understand to what extent?
For the first MySQL, you have to know the common parameter settings, how to choose the storage engine, also you need to understand the common indexing engine, know how to choose. We know how to design table, how to optimize SQL, how to tune according to the implementation plan. You need to do advanced design and optimize the sub-library sub-table, the general Internet business databases are separate read and write, but also vertical and horizontal split, so this is also an experienced ingredients in it. Then the redis, mongodb is need to understand the principles, we need to adjust parameters, and nginx and JAVA tomcat almost all aspects of the Internet must be equipped, in fact, with Ali's choice somewhat related technology stack. As RPC related more to go on, have a variety of network protocols, serialization technologies, SOA, etc., you need to have a deep understanding. Now broad application of RPC framework in the country is the Dubbo. Under normal circumstances not specifically does not require the development of middleware systems and support systems to understand too much detail, domestic enterprises are mainly used ActiveMQ and kafka. A very comprehensive summary of Internet Architecture Java technology learning course Master:
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在互联网公司面试中，架构的底层一定是面试官会问到的问题，针对面试官一般会提到的问题，我录制了一些底层原理的录像视频，加群619881427可以免费获取这些录像，里面有些分布式，微服务，性能优化，Spring，MyBatis的等源码知识点的录像视频。上图的性能优化只是其中的一小部分，这些视频都是我找一些资深架构师朋友一起录制出来的，视频希望能够帮助到以下几类程序员：
1.对现在的薪资不满，想要跳槽，却对自己的技术没有信心，不知道如何面对面试官。
2.想从传统行业转行到互联网行业，但没有接触过互联网技术。
3.工作1 - 5年需要提升自己的核心竞争力，但学习没有系统化，不知道自己接下来要学什么才是正确的，踩坑后又不知道找谁，百度后依然不知所以然。
4.工作5 - 10年无法突破技术瓶颈(运用过很多技术，在公司一直写着业务代码，却依然不懂底层实现原理)
如果你现在正处于我上述所说的几个阶段可以加下我的群来学习。而且我也能够提供一些面试指导，职业规划等建议。