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Preface

If you are still asking me today "Why do programmers need deep learning?", then it just means that your interest in development is not high, your enthusiasm for programming is not enough, and you do not have a clear idea of ​​your career development. planning.
As a developer, not to mention that you are required to be the top in the industry, but you must also ensure that you are not eliminated by the market. Learning is the most basic thing for programmers.
Let me share my experience with you, I hope it will help you!

one side

1. Introduce yourself, why choose to come out to see the opportunity

2. Talk about projects, how to do alarms, and how to do unified access to monitoring items

3. Chat project, configure center project, ask how to do real-time configuration push

4. Discuss why all the component dependencies are selected to be controlled in the configuration center

5. I want to do a current limiting function, how to do it?

6. How to make this current limit distributed?

7. How to grab the lock? How to release the lock?

8. After the timeout is added, is it possible to be robbed of the lock without releasing it? How to deal with it?

9. How can this problem be solved without the heartbeat of zk?

10. If you want to make this current limit configurable, you need to have a background management system to configure global traffic for a certain api at will.

11. In a certain business, a globally unique incremental ID needs to be generated, and the amount of concurrency is very large. What should I do?

12. Algorithmic problem, find the specified number of M*N matrix that increases both horizontally and vertically

13. What do you want to ask me?

Two sides

1. What is the tool chain and technology stack you usually use?

2. Has golang ever stepped on the pit?

3. Are there any bugs in this golang code?

4. How to solve the storage, conflict, expansion, and concurrent access of HashMap in Java?

5. What are the advantages and disadvantages of the red-black tree when the linked list is too long in the zipper method?

6. Where is the concurrency insecurity of HashMap?

7. When HashMap expands, what special treatment does it have to read and write operations?

8. How does ConcurrentHashMap achieve concurrency safety?

9. What lock mechanisms does Java have, and what are their characteristics?

10. Do you know CAS? How is CAS implemented in Java?

11. What is the storage engine of MySQL? Why InnoDB?

12. What is the difference between MySQL clustered index and non-clustered index?

13. What are the differences and advantages and disadvantages of B+ trees and binary trees?

14. Design an index for a scene, examining the knowledge of joint index and column selectivity

15. There is a new query scenario, how to solve it?

16. If you want to check A in () AND B in (), how to build an index?

17. When checking A in () AND B in (), how does MySQL use the index?

18. If query A in (), does MySQL check the index for N values ​​separately, or is there a better operation?

19. Which data structures of Redis have you used? How is ZSET implemented?

20. zrange start, stop, the total length is n, what is the complexity?

21. How do Kafka consumers do message deduplication?

22. Introduce Kafka's ConsumerGroup

23. How are Kubernetes and Docker used?

24. What is the storage structure of a time series database?

25. Do you understand the LSM tree? What kind of storage structure is it?

26. Have you used Cassandra and RocksDB in production? How much?

27. What is Cassandra's tombstone mechanism?

28. Algorithmic question: The original question on Niuke's questionba, you can go and see: NC76 uses two stacks to implement queues

Three sides

1. Talk about projects and work experience

2. What pits have you stepped on in the process of using Kubernetes?

3. Consider a business scenario: the number of comments on headline articles is very large, for example, a popular article has millions of comments, design a back-end service to realize the timing display and paging of comments

4. If you use id to turn pages, how to design the database table? How to design the index?

5. If the quantity is large, do you think it is necessary to divide the database and the table? How to divide it?

6. How to query the paging after the database is divided

7. How to ensure that the primary key is still incremented after sub-database sub-table?

8. Now it is necessary to support deep paging, page number jump directly, how to achieve it?

9. The instantaneous write volume is very large and the storage may be suspended. How to protect it?

10. How is the internal circuit breaker implemented?

11. The circuit breaker will cause write failure, what if we don't allow write failure?

12. Algorithm problem: N concerts, given in the form of [{startTime, endTime}…], calculate the maximum number of concerts you can listen to. Implement this algorithm in the language you are most familiar with

13. You used the greedy method. What problems might be greedy?
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