In general, most companies interviews are based on the process of self-introduction + project introduction + project details/difficult questions + basic knowledge assessment + algorithm questions. Some companies may also ask a few questions about actual scenarios. Ali must ask in this link. There is usually no correct answer to this kind of question. It depends on personal understanding and personal accumulation. The rest is nothing, it’s all about changing the soup instead of changing the medicine. Talking about the project depends on whether you have a thorough understanding of your own project. For example, I often ask you why you chose this technology and why you handled it like this. There are so many basic knowledge points for the test, and the final algorithm is to rely on brushing the questions.
Today, I will share with you all the most frequently used interview question banks in mainstream companies. They are also the latest answers after the Java version is upgraded. This will save the interviewees many unnecessary detours. At the same time, a detailed interview analysis document is done for each topic to ensure that readers at each stage can understand it.
ZooKeeper
- CAP theorem
- ZAB agreement
- Leader election algorithm and process
For ZooKeeper, this Java interview knowledge point and real question analysis summarizes ZK frequently asked knowledge points and interview question analysis. Friends in need can click here to get free: https://docs.qq.com/doc/DTlpqcU53c0JtdkZx
Redis
- 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's persistence mechanism (required)
- Redis pipeline
For Redis, this Java interview knowledge points and real question analysis summarizes frequently asked knowledge points and interview video analysis links. Friends in need can click here to get them for free: https://docs.qq.com/doc/ DTlpqcU53c0JtdkZx
Mysql
- Basic elements of business
- Transaction isolation level (required)
- How to solve the problem of transaction concurrency (dirty reading, phantom reading) (required)
- MVCC multi-version concurrency control (required)
- 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 (required)
- What things can be stored in the leaf nodes of the index B+ tree (required)
- When the query will not go (expected) index (required)
- How to optimize sql
- explain how to parse sql
- Principle of order by
For MySQL, this Java interview knowledge points and real question analysis summarizes frequently asked knowledge points and interview video analysis links. Friends in need can click here to get them for free: https://docs.qq.com/doc/ DTlpqcU53c0JtdkZx
JVM
- Runtime data area (memory model) (required)
- Garbage collection mechanism (required)
- Garbage collection algorithm (required)
- Minor GC and Full GC trigger conditions
- GC中Stop the world（STW）
- The characteristics and differences of each garbage collector
- Parent Delegation Model
- Relationship between JDBC and Parental Delegation Model
For MySQL, this Java interview knowledge points and real question analysis have compiled the JVM study notes and study route map, and explained the learning content and practical notes of the JVM in detail. Friends in need can click here to get it for free: https ://docs.qq.com/doc/DTlpqcU53c0JtdkZx
Java basics
- The difference between HashMap and ConcurrentHashMap (required)
- ConcurrentHashMap data structure (required)
- How does the high concurrency HashMap ring come into being
- Volatile role (required)
- How to ensure atomicity of Atomic class (CAS operation) (required)
- The difference between synchronized and Lock (required)
- Why use thread pool (required)
- Parameters of the core thread pool ThreadPoolExecutor (required)
- ThreadPoolExecutor workflow (required)
- How to control the priority of thread pool threads
- How to communicate between threads
- Boolean takes up a few bytes
- What are the new features of jdk1.8/jdk1.7
- Exception和Error
Spring
- Implementation of Spring's IOC/AOP (required)
- Realization of dynamic agent (required)
- How does Spring solve circular dependencies (three-level cache) (required)
- Spring's post processor
- How to implement Spring @Transactional (required)
- Spring's transaction propagation level
- The connection and difference between BeanFactory and ApplicationContext
For the Spring series of questions, this Java interview knowledge points and real question analysis have compiled interview question analysis and 25 video explanations of Spring source links! https://docs.qq.com/doc/DTlpqcU53c0JtdkZx
other
- How to realize the current limit of high concurrent system
- The design of high concurrency spike system
- How to design load balancing
This 500-page Java architecture advanced interview analysis notes covers ( Java, MyBatis, ZooKeeper, Dubbo, Redis, MySQL, Spring, Spring Boot, Spring Cloud, RabbitMQ, Kafka, Linux, etc. ) There are video links, documents Analysis, sorting out knowledge points, etc.! I hope everyone can find a company that suits them and have a happy code.
Information acquisition method: like + bookmark and poke here for free: https://docs.qq.com/doc/DTlpqcU53c0JtdkZx
Say the important thing twice, like it! like! Free way to get information later!
supplement
In addition, some computer networks and operating systems will be tested. Like message queues, RPC frameworks are rarely tested. Computer network is hierarchical, tcp/udp, three-way handshake and the like. The operating system is the process and the thread, the data structure of the process and how to communicate. The sorting algorithm of the data structure is also more frequently tested, and you will be sure to write a quick sort by hand. The remaining algorithmic questions are accumulated by LeetCode.