Interviews mean that there are always various possibilities around you, and you have such abilities, so you can't help but want to give it a try, especially at the end of the year, it is a good stage to accumulate momentum and accumulate seriously. Of course, there are many interview routines, but for technical interviews, it is mainly to examine a person's technical ability and communication ability. Different types of interviewers ask different questions according to their own understanding, and there are no rules to follow.
"Interviews make rockets, and work turns screws." First of all, we have to be able to screw, so that it is possible to build rockets. This year, we have sorted out many high-frequency interview questions and analyzed them. I have also obtained some interview technical points on many platforms. Learning video, share it with everyone here today!
Java entry and advanced core technology
Here I will first talk about the technology stack that programmers of all ages need to master:
-
0~1 year in the pit (moving bricks and coders): Java foundation + multi-thread foundation + JVM foundation + some development tools + SSM framework construction + network + algorithm and data structure + learning ability;
-
2~3 years in the pit (development engineer): concurrent programming + JVM + framework source code + design mode + MySQL tuning + familiarity with the use and configuration of Redis, messaging, Nginx, Zookeeper, microservices + practical project experience ;
-
4~5 years in the pit (preliminary exploration of architect): JVM tuning + underlying mechanism and principles of source code + in-depth distribution, caching, messaging, microservices + solving distributed scene problems + high-concurrency practical project experience + certain project management and team management experience ;
XMIND
1. Java basics: JAVA exception classification and handling, JAVA reflection, JAVA annotations, JAVA internal classes, JAVA generics, JAVA serialization (creating reusable Java objects), JAVA replication, etc.
2. JVM: thread, memory area, runtime memory (new generation/old generation/permanent generation), garbage collection and algorithm, four reference types of JAVA, GC garbage collector, JVM class loading mechanism, etc.
3. Multi-thread concurrency: JAVA thread implementation/creation method, 4 thread pools, thread life cycle (state), JAVA background thread, JAVA lock, thread basic method, thread pool principle, blocking queue, etc.
4. SSM framework: Spring features, Spring common modules, Spring principles, Spring MVC principles, Mybatis cache, etc.
5. Database: storage engine, index, three paradigms of database, database transaction, database concurrency strategy, partition and table, etc.
6. Network: 7-layer network architecture, TCP/IP principle, HTTP principle, Netty, etc.
7. Design patterns: design principles + factory method patterns, abstract factory patterns, etc.
Summarize
The advanced and in-depth technical points are not introduced here, just for the convenience of friends who want to make surprise interviews in the "Golden September and Silver October", so that they can better and faster master the technical points that occupy a higher weight in the interview field.
Of course, if you want to achieve an interview pass rate of 95% or higher, it is not enough to just understand the technical points introduced above, you have to go through most of the knowledge points in the second brain map (Xmind map) , At least it can be guaranteed that more words such as "familiarity" and "mastery" should be written on the resume.
Set your heart down to study and build up some of your own core competitiveness, so that you can hold the interviewer in your own hands.