Five years ago, BAT was at the center of a wave that saw US-listed Alibaba become China’s largest Internet company by size, Tencent dominate the mobile Internet thanks to wechat, foreign companies began to leave China and the halo of state-owned enterprises began to fade.

In recent years, the hottest companies among new graduates have been TMD and unicorns, which represent the cutting edge of technology and promise high salaries and bright prospects.

Bytedance became my life’s goal.

Today, I finally “jumped in” bytedance through four interviews, and I got the offer from ByteDance thanks to my own implementation of these plans.

Note: The following interview questions about Bytedance + analysis, Java learning materials, e-books, mind brain maps, videos, interview questions, etc., are stored in the disk, need direct help to forward, add assistant Vx: Yunduoa2019 after attention or scan the following QR code, follow the assistant’s guidance to obtain

 

After four sides, “Jump” Bytedance

Bytedance side:

  • To introduce myself
  • Differences between TCP and UDP and application scenarios
  • TCP three handshakes, why a third?
  • Let’s talk about the difference between get and POST, other commands
  • Let’s talk about the difference between a process and a thread. When do you use multithreading? How to ensure thread safety?
  • What is the use of synchronized?
  • Stacks and queues, how do you implement queues with stacks?
  • Garbage collection algorithm, replication algorithm too many live objects?
  • Reachability analysis, what objects can GC Root be?
  • Hashmap implementation, put get process, expansion, why the capacity is a multiple of 2?
  • Short +int = short; short+int = short;
  • String classes, String addition + low-level operations, StringBuilder and StringBuffer
  • Algorithm: Given an array, make the array odd in the first half, even in the second half, operate on the original array.

Bytedance side 2:

  • Technical architecture for multiple projects, not business architecture for MySQL, Redis, Nginx, Kafka
  • What are the technical points of the project learned? Also specific knowledge points.
  • Why is the leftmost prefix in MySQL?
  • Have you been exposed to any automatic fuse tools
  • 502 What are the possible causes?
  • How to troubleshoot online problems? What if Full GC is frequent?
  • QPS of the service, schema and version of the database.
  • Analysis of advantages and disadvantages of SpringBoot
  • SpringBoot boot source code analysis
  • How is the service deployed?
  • Algorithm title: according to the glyph layer traversal binary tree, bug free, and the construction of binary tree test.

Three aspects of Bytedance:

  • Jdk8 default garbage collector, know which garbage collector? G1 Tell us more
  • What is the underlying synchronized keyword?
  • What resources are shared between threads? What is exclusive?
  • What’s the difference between a heap and a stack?
  • Linux query resource command? How to check which ports are occupied
  • What is a swap in Linux memory? What use?
  • What is the difference between user mode and kernel mode? Why the user-kernel distinction?
  • What are the types and differences of interrupts?
  • Deadlock concept? Conditions?
  • Arithmetic question: odd digit increment even digit decrement array, sort
  • The difference between get and Post?
  • Can get be cached? The INTP (? How is this implemented in where?
  • Write SQL, group by query?
  • MySQL search engine? Difference between InnoDB and myISAM

HRBP surface:

  • To introduce myself
  • Why are you looking at opportunities? What kind of opportunities are you looking at?
  • Why the chance to read the headlines?
  • What kind of company do you think Toutiao is?
  • How would your friends and colleagues describe you?
  • What are your hobbies?
  • What was the most enjoyable period of your stay at the company? why
  • Do you have any idea of the direction we are heading?
  • Are you interested in our business direction and technology?

Absorb experience, refer to the summary, make plans, implement actions

The so-called list of plans, in fact, in our way of learning, we should have a clear goal and steps, no matter what type of learning you are, you should have a set of their own learning plan, otherwise it is easy to appear “aimless” situation.

So how should a plan be made?

Here’s one of the steps I take to make a plan:

Step1: time planning

The first step is to have a time plan of your own. The so-called time plan is actually time management. For example, when you want to learn a certain technology stack, set a time period and ask yourself to complete it. Attached is my previous schedule:

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Step2: list the knowledge points to learn

List the knowledge points to learn, first list the technology stack to learn, and then about this technology stack we need to learn what knowledge points, such as Redis, in addition to the basic part of Redis, it needs to understand caching, persistence mechanism, avalanche, penetration, etc. More advanced techniques include BloomFilter, RedisSearch, and Redis-ML.

  • Java Core Knowledge:

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Step3: draw brain map (Xmind)

In the process of learning, we need to learn how to draw a brain map, which is a habit I have always maintained, because a clear structure map can comb our thinking and give us a clear understanding. How to learn? How to learn it well? To what extent?

  • Take Redis encephalography for example:
  • In addition to Redis brain map, I also sorted out Spring, SpringBoot, MySQL, JVM, Kafka, Docker and other related brain maps.

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Step4: take notes

As the saying goes, a good memory is not as good as a bad pen. In fact, taking notes is very important for every one of us. Whether it is looking at some technical documents or brushing interview questions, you can record what you think is deep, and then read it again. Of course, I mainly made some notes using classes, such as SpringBoot notes, Redis notes, etc.

  • Java Core Knowledge Notes:

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Step5: read a book (ebook)

Has its own gold room in the book, no matter what to read books, to oneself are ascending, programming books too much, buy real books really not very convenient, so proposal at ordinary times also can be able to read some PDF documents, most of the people reading habits are gradually in the ebook, I myself is seen many ebooks, actual combat, the source code for reading class there are a lot of.

  • SpringBoot combat:

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  • Spring source code deep parsing:

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Step6: Watch the video

Read a book to see not into, then watch the video, I believe that there are still many small partners is like to follow the video learning ~ about the video, I occasionally brush after work, the network disk lay a lot of big guy’s video course, to be honest, it is really more efficient than reading a lot of, many do not understand the problem on a dial.

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Step7: brush the problem brush the problem

No matter club recruit or school recruit, brush the question is still good for oneself, to the interview of big factory ask what at least have an understanding. There are many ways to brush the questions, so see their own choices and habits, you can go to a cow network brush the questions, but a cow network is for school recruitment, if the post is a bit more advanced, or suggest to find resources.

I also have some Java advanced interview questions on hand, including BAT factory, also have some topic sorting, need can private message me.

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conclusion

On paper come zhongjue shallow, only practice out of real knowledge.

Having said so much above, I hope you can get some of it. In fact, I want to emphasize the importance of learning. All the above information can be free to share with you, hope to progress together, friends in need to help forward it, pay attention to add assistant VX: Yunduoa2019 or scan the two-dimensional code below, follow the guidance of the assistant to obtain their own