Foreword:
An ordinary undergraduate, who has been developing for more than 3 years, is also more diligent in his studies, and also very serious in his work. Although his dream is to enter a big factory, he also knows that the Java industry in this era is fierce and difficult to enter. So it took more than five months to study, while learning to strengthen myself, while working to deepen my experience, but in April this year, I finally squeezed into the big family of Bytedance.
Experience:
Every interviewer asks different questions, and the similarities are mainly in the process. At the beginning of the interview, I will introduce myself, the main business architecture and technical architecture.
For example, in the technical architecture part, we will ask questions based on the technical points mentioned in the self-introduction, why we used these technologies, what problems we solved, what difficulties we encountered, and how we thought about and solved them.
Finally, by the way, there are some underlying design issues of the technology itself, such as: with redis, what scenarios will be asked, what problems have been solved, how much data is, what problems have occurred in the process of use, how to locate and solve them, and Its hash principle, etc., and so on.
Reminder: The interviewers like to ask about mq, jvm, multithreading, locking mechanism, etc.
one side
- Introduce the principle of HashMap, introduce the red-black tree, how to become thread safe, and lock mechanism
- Introduce JVM
- Introduce MySQL, B+ tree, storage engine
- How to log in to your blog
- What to do if you don't use redis to store sessions
- There are two gamblers with equivalent skills, A and B (i.e. each has a 0.5 gambling win rate). Now set the winning rules as follows: 1. A wins as long as 2 or more games are won 2. B has to win 3 games or Only above can win. What are the winning percentages of both sides?
- There is an unfair coin (the probability of being thrown heads and tails is not equal). Can I use this coin to generate equal probability?
- Replication of complex linked lists
- If you use a new, will there be memory leak problems? It will happen in C++ (heap and stack problems in Java)
Two sides
- Self introduction
- Familiar with Docker? Introduce how Docker isolation and permission control (namespace and cgroup)
- Introduce your blog, using SpringBoot? Introduce IoC and AOP, if you want to realize an IoC, how to realize it, how to realize it if you want to realize an AOP
- AOP is similar to which design pattern
- How does Spring solve the problem of circular dependencies
- HashMap and thread safety
- Familiar with Linux? Introduce the Linux commands you know
- If you want to know the resource occupation of the process, how to use the command to achieve
- Write a question: LRU Cache (I said that there is one on my blog that I have implemented before, and then I changed the topic)
- The first M smallest numbers of N sorted arrays. What if N arrays are out-of-order arrays? If the array length is very long and M is very small, how to do it
Three sides
- Self introduction
- IO model (I said what I know)
- If you want to implement from JSON to binary stream to the target server and then parse out JSON, how to achieve it? Has the ARP protocol been used (I don't know)
- Introduce HTTP
- Introduce TCP
- Introduce the difference between TCP and UDP
- If A transfers money to B at the same time B transfers money to A, how can the amount of concurrency be the highest?
- Introduce locks and usage scenarios, and then I was drawn to Java locks and HashMap and ConcurrentHashMap
- Introduce the MySQL storage engine
- Have you learned redis? Introduce redis
- How is your data structure
- Binary tree to doubly linked list
- Why do you write the code, some enlarging brackets and some on one line
Ending: I have compiled the above interview questions through many channels and friends. It must be the latest Java learning materials!
The focus is to recommend to everyone. The Java post interview question bank in this material contains Java back-ends and interview scenes and interview questions from some major companies. I also continue to brush questions to improve my vision
Java post technical interview question bank (5000+ interview questions)
This question bank contains the following many modules: Java basics, containers, multithreading, reflection, object copy, Java Web modules, exceptions, networks, design patterns, Spring/Spring MVC, Spring Boot/Spring Cloud, Hibernate, Mybatis , RabbitMQ, Kafka, Zookeeper, MySql, Redis, JVM...
