Unforgettable Ali, 4 skills, 5 hr additional written tests, it's really difficult and sad to walk

This time Ali is really worried , It's been through 4 Wheel technology +1 Round written test +hr Noodles , It's a long process , I'm under a lot of pressure .

Summarize Ali's interview characteristics ：【 Self introduction. 】->【 Project introduction 】->【 Scene resolution 】->【 Basic knowledge of 】, In addition to the basic interview, Ali , It also values the candidate's problem-solving thinking . Still need candidates to accumulate a little bit , If you write a project that is not your own , It's easy to be asked . ok , Let's take a look at the uneasy Ali 6 Facial meridian ！

one side

1. Self introduction.
2. Introduction to project difficulty
3. How to implement delayed tasks
4. How to realize current limiting
5. Parameters of thread pool
6. Can you make one by yourself java.lang.String And load
7. Redis Why so soon?
8. epoll and poll The difference between
9. The way the process is synchronized

Two sides

1. MySQL Index mechanism of
2. How to realize memory allocation and management ？ Don't know much about , And then I said jvm Garbage collection mechanism
3. Inside your company RPC frame , Introduce to you
4. Redis Of key Expiration strategy
5. Cache penetration and cache avalanche
6. Distributed lock
7. How to achieve the global id Generation strategy
8. Pessimistic lock and optimistic lock
9. Red and black trees understand

On three sides

1. How to realize group message read
2. How to ensure that message push does not repeat
3. Kafka How to ensure the reliability of the message
4. RPC What is it? , and http What's the difference between calls
5. Talk about the architecture of your project
6. GC
7. MySQL The index principle of , Gave a scene , How to optimize
8. ......

End of face 3 There was a written test question later （ The heart is breaking down ~~）

Additional written examination

1. producer-consumer
2. Two threads print alternately
3. Multithreading simulation 100 Divide the money at random 20 personal , Everyone is assigned at least to 2 Cents

Four sides

1. Write a producer-consumer Well , I said I wrote about it last time .. Silly .. What should not be said , Then the interviewer changed the question , Fortunately, it's simpler , Write a binary search ,2 Minutes to finish writing .
2. Project difficulties
3. MVCC
4. HTTPS
5. ElasticSearch Query process of
6. Kafka How to ensure high availability
7. Reids Clusters and electors of
8. Know what distributed consistency algorithms
9. How to achieve the timing of customs clearance
10. ......

HR Noodles （ alas , Ali's hr The noodles are really unforgettable ...）

• tell us your opinion , If you are the technical manager of the Department , How to deal with the loss of online merchant data
• How to recommend a product to other teams , How to define the boundary
• How to coordinate the relationship （ I'm almost sweating here , I'm afraid the last level will be killed ）
• How are you getting along with your colleagues , Tell me about a time when you helped a colleague
• Salary

No kidding , Ali's interview process is very long , And when a department goes down , It's going to be picked up by another department , The endless face . In a word , Ali's interview experience is also good , This time, although the face is uneasy , Finally, I received it within three days offer, I'm really glad .

And thank you a month or so ago , An interview secret given to me by my good brother 【 This script is really good , Friends in need, pay attention to the official account ：JavaAC, Free access 】 Sorted out various knowledge points , Like distributed 、MySQL、Redis、 Threads 、JVM、 data structure 、Spring relevant 、 performance tuning 、 frame 、 Microservices 、 Algorithm, etc. （ I sort them out , Save it for the next fight , The following figure is clearly visible ）

What I like most is the learning mind map （ yes xmind Outline of ） Yes MySQL、Redis、JVM、 Multithreading and so on

Frankly speaking , Brushing questions is really useful . Pinch fingers , I'm afraid I've been brushing for a month , These notes sorted out during the period are in the first two pictures , There are notes, interviews, books , They all feel very good .