My buddy interviewed Meituan in March, I compiled these 7 essential Java technology stacks for him, and got an offer.

A while ago, a friend of mine went for an interview with Meituan. Knowing that I had watched a set of interview videos of a certain class before and got an offer in the interview (though I didn’t go there later), he came to ask me the main points of the interview.

I told him a few knowledge points and gave him the set of learning videos. He said how could it be tested? As a result, 6 of 7 were tested, and he basically got the answer!

Now I also share these interview knowledge videos with you, I hope I can help you more or less. If you need the following learning videos, please click here to get the information for free!

1. Tell me how the JVM loads a class into memory?

This question is actually relatively simple, but you need to study the JVM, including its partitioning, class loading mechanism, parent delegation, etc. In short, JVM must be a focus of the interview. At the same time, there are 15 videos compiled by JVM to learn!

1. Explanation of JavaSE architecture
2. The overall formation of JVM
3. Program counter explained
4. Virtual machine stack explanation
5. Thread shared area explanation
6. The impact of code execution on the JVM memory area
7. Local method stack explanation
8. Memory overflow OOM exception and interview question analysis
9. The concept of GC
10. How does GC judge the survival of objects
11. Explanation of Garbage Collection Algorithm
12. Explanation of the new generation and the old generation
13. Garbage collector explanation
14. Stop The World phenomenon in garbage collection
15. GC tuning actual combat

2. Talk about the principle of Spring transaction annotation, then talk about the transaction isolation level you understand.

The principle of some functions of Spring is also a scope that must be tested, such as the principle of AOP; at the same time, the principle of some databases also needs to be known. The following question is also frequently tested. Here is a SpringAOP, transaction notes, and IOC and Spring source code explanation videos. There are 36 videos in total. It will be no problem after the interview!

3. Talk about the index structure of MySQL, and talk about your experience of optimized indexes or slow SQL optimization.

MySQL is a database used by every company, so it is a required test. Usually the questions will revolve around index structure, index optimization, MVCC and sub-database sub-tables. A video can get MySQL optimization in 2 hours, and the interview is not panic at all!

4. Have used Redis? Talk about Redis application scenario design!

Big factory asks Redis like to follow the project to ask, here to share 5 big factory Redis application scenarios core design actual combat, understand the complete spike interview!

1. Redis basic review
2. Five data structures commonly used in projects
3. String type and the actual design of WeChat Moments
4. Hash types and Taobao shopping cart combat
5. The actual design of global order number and WeChat subscription number message push design
6. WeChat lottery function and WeChat like design actual combat
7. Sina Weibo relationship design combat

5. Do you understand the underlying principles of HashMap? Have you understood the source code?

Don't say why you want to ask, we don't dare to say, we don't dare to ask. Many blogs have written about this issue. In fact, I personally think it’s easier to understand it by reading Daniel's remarks! Share 5 HashMap learning videos here, 2 hours to understand!

1. Basic knowledge of data structure
2. HashMap data structure
3. Hsah algorithm explanation
4. The working mechanism of HashMap
5. In-depth HashMap source code

6. Distributed transaction solutions

The current microservice architecture is becoming more and more popular, and the processing of distributed transactions has become a hurdle in distributed projects. Distributed transactions have also become a must in the interviews of middle and high-level development. Share an Alibaba P7 here. Video explanation of the actual combat solution for distributed transactions taught by the architect!

1. The concept of local affairs
2. Standard distributed transaction
3. Flexible Affairs—BASE Theory
4. TX—LCN business explanation
5. TCC affairs, compensation type explanation

7. The resume wrote about the experience of doing the spike system, and talked about the spike in your project!

It can be said that for 3 to 5 years of experience, many companies have asked about spikes in interviews. Not much to say. I will share a video explaining the analysis of spikes architecture for everyone. Friends who need the above learning videos please give them a thumbs up and click them. Here you can get the information for free collection method!

In fact, it can be seen from the above that the knowledge points of the interview are actually fixed, and the soup is not changed. As long as you master the principle, the rest is not a problem. Having said so much, let's take out some practical things. The following is a mind map that summarizes 95% of the knowledge points of the advanced technology stack of the Internet Java back-end architecture, which is not expanded here.

At the same time, there are some interviews and advanced documents to share with everyone! Friends in need, please click here to get the information for free after you like it!

Analysis of 1080 Interviews for Internet Java Engineers

The compilation of Java advanced architecture interview knowledge points