Write at the beginning
Gossip (long story short):
The beginning of this year is somewhat special. The epidemic has had a great impact on our lives. For a job seeker, it has added a "difficult wall". Despite this, we cannot miss the money. Three silvers and four opportunities should be seized. Nowadays, many Internet companies have adopted the method of online interviews, so prepare in advance, submit your resume and interview smoothly, and you will surely win the offer you like. And I finally get the success I want. ByteDance succeeds in 4 ways. Clearance.
Personal introduction:
I was born in a small town in Jiangnan and studied in Beijing. I stayed there after graduation. I have a 211 undergraduate degree. I have good qualifications in all aspects. Therefore, my own advantages can be fully reflected in my resume. Many companies have thrown an olive branch. As long as the interview goes well, it is basically the company's choice.
The following mainly share experience and personal learning methods, which will include many PDF documents, such as interview question bank (including answers + analysis), study notes, actual combat documents and brain maps, etc., which can be shared for free
How to get information: if you need to get it, it’s troublesome to get it, one-click triple-link + comment, then add VX (tkzl6666) to get it for free
Bytedance 4 core interview questions
01 Zookeeper section
- CAP theorem
- ZAB agreement
- Leader election algorithm and process
02 Redis section
- Application scenarios of Redis
- Data types supported by Redis (required)
- The data structure of zset jump table (required)
- Redis data expiration strategy (required)
- The specific implementation of Redis's LRU expiration strategy
- How to solve the Redis cache avalanche and cache penetration problems
- Redis persistence mechanism (required)
- Redis pipeline
03 Mysql section
- Basic elements of business
- Transaction isolation level
- How to solve the problem of transaction concurrency (dirty read, phantom read)?
- MVCC multi-version concurrency control?
- What are binlog, redolog, and undolog, and what are their functions?
- InnoDB row lock/table lock?
- The difference between myisam and innodb, when to choose myisam?
- Why choose B+ tree as the index structure?
- What can be stored in the leaf nodes of the index B+ tree?
- When does the query not go to the (expected) index?
- How to optimize sql?
- How does explain parse sql?
- Principle of order by
04 JVM part
- Runtime data area (memory model)
- Garbage collection mechanism
- Garbage collection algorithm
- Minor GC and Full GC trigger conditions
- GC中Stop the world
- The characteristics and differences of each garbage collector
- Parental Delegation Model
- Relationship between JDBC and Parental Delegation Model
05 Java basic part
- The difference between HashMap and ConcurrentHashMap
- Data structure of ConcurrentHashMap
- How does the high-concurrency HashMap ring come into being?
- Volatile role
- How does the Atomic class ensure atomicity (CAS operation)
- The difference between synchronized and Lock
- Why use thread pool?
- Parameters of the core thread pool ThreadPoolExecutor
- ThreadPoolExecutor workflow
- How to control the priority of thread pool threads
- How to communicate between threads
- Boolean takes up a few bytes
- What new features are added in jdk1.8/jdk1.7?
- Exception和Error
06 Spring section
- Implementation of Spring's IOC/AOP
- Realization of dynamic proxy
- How does Spring solve circular dependencies (three-level cache)
- Spring's post processor
- How is Spring @Transactional implemented?
- Spring's transaction propagation level
- The connection and difference between BeanFactory and ApplicationContext
07 Other parts
- How to realize the current limit of high concurrent system?
- The design of high concurrency spike system
- How to design load balancing?
Answers to ByteDance interview questions:
Due to space issues, the answers to the interview questions are organized in a pdf file. If you need the answers to the interview questions, you can get them for free through private message [Interview]~
How did I prepare for the Bytedance interview?
(1) Adjust your mentality and face gains and losses correctly
The most common problems in interviews are mentality. Interview adjustment mentality comes first. How to adjust to the best mentality? During the interview, many job applicants have unclear thinking, unfluent language, illogical speech, and will constantly deny themselves. In the final analysis, it is a question of interview mentality. Therefore, it is very important to adjust their mentality and face gains and losses correctly. The method is to give yourself enough psychological hints.
(2) Improve technology and broaden knowledge
For programmers, if they want to grow into an industry leader, the only way is to continuously improve their skills, broaden their knowledge, and reach a certain height and depth through learning. So how to improve your technology and expand your knowledge reserve?
The following are some of my personal practices, I hope I can provide you with some help:
- 21 days to finish 283 pages of pdf document
Java part: Java basics, collections, concurrency, multithreading, JVM, design patterns
Data structure algorithm: Java algorithm, data structure
Open source framework: Spring, MyBatis, MVC, netty, tomcat
Distributed part: architecture design, Redis cache, Zookeeper, kafka, RabbitMQ, load balancing, etc.
Microservice part: SpringBoot, SpringCloud, Dubbo, Docker
- Actual combat series: Spring family bucket + Redis, etc.
- Other related e-books: source code + tuning
(3) Questions
How to write questions? This is the confusion in the minds of many interviewees now. We all know that it is necessary to brush questions before the interview. After all, many questions have a certain commonality. If you brush enough questions, you can draw inferences from one another, and even get asked during the interview. The original question can be talked eloquently, so how to proceed with the question? Suggestion: It is best to find some original interview questions over the years and train yourself by topic.
The following is my private interview question bank:
Concluding remarks
For the interview with a big factory, I want to emphasize that the mentality is really important. It is the key to determining your performance in the interview process. If you can’t perform normally, it’s likely that you missed the offer because of a small mistake, so you must pay attention to it. stand up. Another reminder, full review is the key to eliminating your nervous state of mind, but if you review enough, you will naturally have more confidence in the interview process.
All the study materials and interview materials in the above content can be provided free of charge. I hope that everyone will have a smooth interview and win your favorite offer!
How to get the article information: if you need to get it, it’s troublesome to get it, one-click triple-link + comment, then add VX (tkzl6666) to get it for free