Bytes to beat three sides take offer: network + GC + + IO + redis + JVM red-black tree + data structure, to help you quickly into the giant!!!!!

The arrival of 5G proves that the development of the Internet industry is as fast as ever. As a developer (Java post), my dream is to be a big company in the Internet industry. I am fortunate to have the opportunity to interview ByteDance.I also made preparations to start preparing a month before the interview, and I was honored to get an offer from 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 shared memory in Linux?
3. Socket network programming, talk about TCP's three-way handshake and four-way wave
4. What is the difference between synchronous IO and asynchronous IO?
5. Java GC mechanism?What are GC Roots?
6. Tell me about the red-black tree, five features, insertion and deletion operations, time complexity?
7. The time complexity of quicksort, the worst case, the best case, the time complexity of heap sort, and the complexity of building a heap

Byte Double Sided

1. Introduce yourself, mainly about what you have done and what you are good at
2. What do you know about design patterns?
3. How does AtomicInteger implement atomic modification?
4. The difference between ConcurrentHashMap in Java7 and Java8?Why is Java8 concurrency better?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's implementation of transactions (MVCC)
2. How is MySQL data master-slave synchronization implemented?
3. Implementation of MySQL index, innodb index, how b+ tree index is implemented, why b+ tree is used as an index node, how much data is stored in a node, how to specify the size, and corresponding to disk pages.
4. If Redis has 100 million keys, will using the keys command affect online services?
5. Do you know the persistence method of Redis, aod and rdb, how to implement it, append logs and backup files, and the underlying implementation principle?
6. What was the biggest difficulty you encountered?How to overcome?
7. What are your plans for the future?
8. What do you want to ask me?

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The above interview questions about ByteDance's back-end research and development, The following are some reference answers to the interview questions.

In the season of gold, silver and four job-hopping, the younger brother has prepared several interview collections for the elder brothers:

• One is the technical dry goods "Java Core Knowledge Point Arrangement"
• One is the real interview question "1000 Internet Java Engineer Interview Questions"
• Interview Collection "Internet Java Engineer Interview Questions"

Java core knowledge points finishing

1000 Internet Java Engineer Interview Questions

An interview guide for big Internet companies