Three-sided byte won the offer, share your own experience and experience: surface experience+network+IO+redis+JVM+GC+red-black tree+data structure

The arrival of 5G proves that the Internet industry is developing as fast as ever. As a developer (Java post), I naturally dream of being a big company in the Internet industry. I started preparing for the interview one month before the interview, and I am honored to get the offer of Bytedance. Here is a three-sided process of Bytedance!

Byte side :

1. Hashmap, how to expand, how to deal with data conflicts? How to efficiently implement data migration?
2. How to implement Linux shared memory, probably talk about it.
3. Socket network programming, talk about TCP's three-way handshake and four waved hands
4. What is the difference between synchronous IO and asynchronous IO?
5. Java GC mechanism? What are the GC Roots?
6. Red-black tree talk about five features, insert and delete operations, time complexity?
7. The time complexity of fast sorting, the worst case, the best case, the time complexity of heap sorting, and the complexity of building a heap

Byte two

1. Introduce yourself, mainly talk about what you have done and what you are good at
2. What do you know about design patterns?
3. How does AtomicInteger realize atomic modification?
4. What is the difference between ConcurrentHashMap in Java7 and Java8? Why is Java 8 concurrency more efficient? When to use HashMap and when to use ConcurrentHashMap?
5. Redis data structure?
6. Redis data elimination mechanism?

Byte three sides

1. The principle of mysql to achieve transaction (MVCC)
2. How is MySQL data master-slave synchronization achieved?
3. The realization of MySQL index, innodb index, how the b+ tree index is realized, why use b+ tree as index node, how much data is stored in a node, how to specify the size, corresponding to the disk page.
4. If Redis has 100 million keys, will using the keys command affect online services?
5. Redis persistence methods, aod and rdb, how to implement it, append logs and backup files, do you know the underlying implementation principle?
6. What is the biggest difficulty encountered? How to overcome?
7. What is the future plan?
8. What do you want to ask me?

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The above is the ByteDance back-end R&D interview question, and the following part of the interview question refers to the answer.

 

The younger brother has prepared several interview books for the older brothers:

• One is technical dry goods "Java core knowledge points finishing"
• One is the real interview question "1000 Internet Java Engineer Interview Questions"
• Interview Book "Internet Java Engineer Interview Questions"

Java core knowledge points finishing

 

1000 Internet Java Engineer Interview Questions

 

Interview Book of Internet Companies

 

Interview question answer, how to get

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