In the Internet to do a few years later, to dachang “gold plating” is the first choice of most people. Big factory not only pay high, welfare is good, more importantly, it is the endorsement of your professional ability, big factory working background how many will give your resume to increase a few points of competitiveness.

But to be honest, it’s not that easy to get into a big factory. One of my friends had undergone more than a dozen interviews before joining Tencent, and finally received an Offer with 40K *16 salary after 4 rounds of technical interviews and 1 round of HR interviews.

The first round focuses on Java basics, such as:

  • The realization of a hashmap
  • Garbage collection in Java
  • What other techniques did you learn besides code, frameworks
  • How do deadlocks occur
  • The difference between threads and processes

The second and third rounds focus on the mastery of applied technology:

  • MySQL index, B+ tree nature
  • Redis persistence
  • TCP wave four times to explain the process, the last ACK if the client did not receive what to do
  • For socket programming, what does the accept method do, in what order of three handshakes

The four sides are about the projects I have participated in and my understanding of the business.

If you can’t answer any of these questions, then I suggest you go through the test bank. I have a copy hereJava architecture growth notes and interviews with didi, Meituan and other big companies, to help you get the big factory interview points, high frequency points, pay pointsPoke my GitHub home pageYou can get it for free

Java from inception to architecture growth Notes directory

New Village — From entry to development for half a year (starting from 12K+)

  • Java Basics: Basic syntax + collection + exception + reflection +IO+TCP+ multithreading
  • Java Web: MySQL Database +JDBC+Servlet
  • Three framework: Spring+SpringMVC+MyBatis+ mall actual combat project
  • SpringBoot+SpringCloud distributed development: micro service introduction + actual combat
  • Project experience: second kill system design +SpringBoot mall combat

Java based article

Three Major Frameworks

Project Experience (Seckill +SpringBoot actual combat)

Step 1-1 to 3 years of development

  • Java Concurrent Programming Basics: Concurrency +JMM+ thread pool + blocking queue + concurrent collection + concurrent utility class + lock + Atomic
  • JVM and Performance Tuning: Memory regions + garbage collectors and memory allocation strategies + classloading mechanisms + tuning
  • Network programming: TCP/HTTP+Netty+ multiplexing
  • SQL Tuning: SQL Tuning Principles + locks + indexes + Tuning + Transactions + Execution plans
  • Tomcat Basics: Architecture + Foundation + Tuning + Cluster + Security
  • Design Patterns: Six principles +23 design patterns
  • IOC+AOP+ declaration transaction source code interpretation
  • MyBatis source code: MyBaits source architecture analysis +MyBaits core module analysis + two level cache

Concurrent programming

JVM and Tuning

Network Programming

MySQL tuning

Design Patterns

The Spring source article

MyBatis source article

Play strange upgrade second step: 4-5 years senior high open

  • Foundation of Distributed Thinking: Evolution of large-scale Internet architecture + distributed knowledge that architects should possess + detailed explanation of mainstream distributed architecture design
  • Distributed monitoring: Zookeeper+Nginx
  • Distributed message queue: RabbitMQ+RocketMQ+Kafka
  • Distributed storage: Redis+MongDB+Mycat

Distributed monitoring

The message queue

Distributed storage

Step 3:5 to 7 years to upgrade

  • Advanced micro service architecture: Docker+SpringCloud+Spring Cloud Alibaba+K8S
  • Multi-million level traffic performance tuning combat: tuning basics + basic code performance optimization + design patterns and performance + concurrent programming performance optimization +JVM depth tuning + database performance tuning
  • First-line large factory distributed scene actual combat: distributed transaction solution + first-line large factory single sign-on solution + distributed task scheduling solution + distributed lock solution in high concurrency scenario + cache solution

Performance tuning combat notes

Dachang distributed scene combat notes

conclusion

Also doing Java, some people have worked for 5 years without any change in salary, and some people have worked for 2 years with an annual salary of 30W. This phenomenon may not have been obvious a few years ago, but with the crazy rapid development of back-end technology in recent years, the era of CRUD can travel all over the world is long gone, and the talent level differentiation is becoming more and more obvious.

Competition is always very cruel, after all, becoming an architect is not so easy, the growth of an architect comes from opportunity, hard work and talent! Whether you’re just starting out or just a few years into development, I believe you need to read the above notes on Java from startup to architecture growth to help you in your career. Remember to poke me at the GitHub home page for free

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