Under the influence of the epidemic, the number of recruitment places has been reduced a lot, but Internet companies such as Ali, Tencent, Douyin, and Kuaishou have accelerated the pace of talent recruitment. Based on my own actual experience, I have compiled a list of interviews with these big companies, hoping to help you find out and fill vacancies and overcome the difficulties of interviews.
1. JVM
The virtual machine has always been the hardest hit area for interviews. Many small partners are planted on it and need to be prepared carefully. The high-frequency test points are as follows: JVM basic concepts, runtime data area analysis, in- depth analysis of JVM objects, such as: class loading principle, parent delegation model, source code analysis (key) , JVM optimization, garbage collection, efficient concurrency, etc.
2. MySQL
In Internet companies, the most commonly used database is MySQL, which must be mastered. First, let’s take an xmind picture, which lists the necessary knowledge points in the interview for your reference. I hope it can help you quickly get started.
High-frequency test points in the interview: MySQL index, architecture, lock, transaction, sub-database and sub-table (key) , cluster, performance analysis and optimization (difficulty)
3. Design patterns In the area of design patterns, interviewers are more likely to ask which design patterns they are familiar with, and if necessary, they will write one or more of them by hand .
4. Basic characteristics of distributed transactions, basic principles of distributed transactions, usage scenarios of distributed transactions, caching, Redis, Zookeeper (key) , distributed lock implementation, breakdown, avalanche (key)
5. Common frameworks for microservices (Spring Boot, Spring Cloud, Dubbo, Netty), service governance, load balancing (focus) , service fault tolerance protection, service invocation , API gateway service, service tracking (difficulty)
Finally, I will share an interview book [Java core knowledge points] covering JVM, locks, high concurrency, reflection, Spring principles, microservices, Zookeeper, database, data structure, etc.", as well as Java 400 interview questions (including answers )! Mastering these knowledge points can be a lot of eye-catching among candidates during the interview. Opportunities are reserved for those who are prepared. Only with sufficient preparation can you stand out among the candidates.
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Your support, my motivation; I wish you all a bright future and constant offers! ! !