Working in Ali 7 year , High working pressure , Fast pace , But it did grow technically , Especially when you maintain the system related to the promotion , hold out to a certain point P8 It took a lot of effort .

The update iteration of technology is getting faster and faster , Programmers are perhaps the most struggling group in this process . Whenever you encounter a technology upgrade , This means that the skills that programmers once relied on will be greatly reduced . Last resort , We must constantly absorb new knowledge , Learn new technologies , day in and day out , go round and begin again . Almost every time , You have to settle down , Fill your skill pool . This is the pressure , I'm afraid only we know .

I am also a person who loves learning , I think learning is a long-term theme in programmers' life and work . So I put these years of work experience into a complete note . This note has helped 10 A friend got Tencent , Ali , Meituan and other large factories offer
!

Because there are too many details , So only the screenshots of some knowledge points are briefly introduced , Each small node has more detailed content ! It includes five parts ,26 Knowledge points (
The following is a screenshot of the document content , To this document , Click the business card at the end of the text , You can get it for free by scanning the code ):

* Java part :Java Basics , aggregate , Concurrent , Multithreading ,JVM, Design pattern
* Data structure algorithm :Java algorithm , data structure
* Open source framework :Spring,MyBatis,MVC,netty,tomcat
* Distributed part : architecture design ,Redis cache ,Zookeeper,kafka,RabbitMQ, Load balancing, etc
* Micro service part :SpringBoot,SpringCloud,Dubbo,Docker

one ,java Knowledge part

Now the interview pays special attention to many basic principles , However, many people do not understand some core principles thoroughly , Especially for Java Some core basic knowledge points of are not mastered enough , for example
JVM, Common algorithms and data structures, etc . It is the so-called wanzhang tall building rises from the ground , Only grasp the foundation firmly , To go further , Only in the face of constantly updated technology can we master it quickly , At the same time in the interview , You can also stand out in your work ! Here's what you have to master Java Knowledge part , A lot of content , Are some key knowledge !!!

1.Java Basics :

 2.Java aggregate :

3. Multithreading concurrency :

4.java virtual machine (JVM):

JVM It's primary Java The only way for programmers to grow , study JVM before , You just need to know how the code is compiled Class, Virtual machine loading Class Just run it , study JVM
after , You can deeply understand the process of code from compilation to loading , Creation and garbage collection of objects in memory , Quickly locate performance problems in daily development, etc , Of course, it is also an indispensable bonus in the interview .

5, Data structure and algorithm

What data structures ( Line , chain , heap , Stack , queue ) And in Java Where is it useful .8 Large algorithm ( Time complexity , Spatial complexity , Memory ,CPU Influence of ) And its application .KMP
Search algorithm , Binary search , recursive algorithm ( Writing method , Memory impact ). number , Figure and its application .hash surface , And its application in practical work .

two , Database part

Recommended reading :《 High performance MySQL》 《MySQL Technical insider :InnoDB Storage engine ( The first 2 edition )》

three , Open source framework

Spring As a lightweight Java Development framework , The idea of interface oriented programming runs through the whole system Java System application , So in Java Often mentioned in the interview .

four , Distributed high concurrency architecture

This part is about distributed architecture knowledge , include Redis,Zookeeper, Database performance optimization , Load balancing, etc !

five , Microservice knowledge

There are many small partners interviewed recently , I hope it can help more people successfully pass the interview of large factories , If you need to click the business card below to scan the code, you can get it for free , No routine !!!

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