Five-sided Alibaba rated P6 after taking the offer: Sharing the Java experience and answer summary

One side (phone)

1. Talk about the understanding of JVM
2. What is the difference between treemap and hashmap?
3. Five state diagram flows of Java multithreading
4. The difference between mysql primary key and unique index
5. Talk about recent projects
6. How to realize session sharing, how to realize it with redis
7. The concept and solution of cache breakdown
8. Talk about microservices, how to manage between microservices

Two sides (site)

1. java nio often? Three classes used
2. Do you understand synchronization locks in java? The difference between Countdownlauch and Cylicbarrior, in what application scenarios
3. The memory structure of the JVM? Which are shared and which are thread private? What is stored in the Java virtual machine stack?
4. How to implement a thread pool for others to use?
5. What conditions will trigger Java class loading?
6. Handwritten code: Quick sort, singleton mode, UML class diagram of a factory and decorator mode
7. The realization principle of AOP?
8. How to optimize a slow query
9. What kinds of Java locks are there? The difference between reentrant lock and non-reentrant lock?
10. What is the difference between Lock and synchronized? Are they all reentrant locks? Which is more efficient?
11. Rough implementation of handwritten SpringMVC DispatcherServlet

 

Three sides (site)

1. What are your usual project concurrency experience?
2. redis data structure
3. redis thread model
4. Redis data elimination mechanism
5. Have you read the redis source code?
6. The principle of mysql to achieve transaction (MVCC)
7. MQ underlying implementation principle
8. Database transaction acid, transaction operation, how to lock, distributed system lock
9. What conditions are prone to avalanches? How to solve

Four sides: technical

1. Project introduction mainly for concurrent thinking
2. For high-tech projects, from architecture design to deployment
3. Design ideas for high concurrency architecture

Five sides: HR side

1. Mainly ask the offer in hand?
2. Talk about life and future plans?
3. And related salary?

The above are the 5 questions about Ali's Java research and development. The following is the latest summary of the most comprehensive range and answers of the most comprehensive Alibaba Group advanced Java required exam questions and answers , including the most comprehensive questions and answers such as MySQL, Spring, Redis, JVM, etc., for reference only~

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The most comprehensive Alibaba advanced Java required test range and answers

 

 

 

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