Technical aspects passed easily, HR: those with only three years of experience in large factories are not worth 20K

There is a small partner in the backstage who sent me a private message , It's not easy to survive the technical interview , But in the offer I stumbled on my choice ！

According to his feedback , There are no big problems in the technical interview , But in terms of post fit , Obviously prefer the second , But on the issue of salary increase , Obviously suffered HR Suppress .

This is also why most of my friends are job hopping 、 Problems encountered in the process of looking for a job , Everyone will definitely choose the one who doesn't like it and has the highest salary offer, But it may cause frequent job hopping !

Actually , Small make up think ： The main reason is the lack of interview skills , Lack of contact with the interviewer or HR The confidence of negotiation ！

To help you , Let's share a report on improving technology 《Java The treasure of Technology 》, It is mainly divided into two parts : First, interview skills and knowledge points of big factories ; The second is the core knowledge about performance tuning

The main contents are as follows :

• First part : Interview skills 、Java Basics 、JVM、 operating system 、 The bottom of the computer + How it's made up 、 Design patterns 、 Data structure and algorithm 、spring、 Concurrent programming 、 Distributed 、Redis…
• Second parts : java Programming performance tuning 、 Multithreading performance tuning 、JVM Performance monitoring and tuning 、 Design pattern tuning 、 Database performance tuning …

The first part : Detailed information display

JVM piece ：JVM Class loading mechanism ,JVM Memory model , Garbage collection mechanism , Class bytecode implementation mechanism ,JVM Tuning case ,GC Algorithm etc.

Java Concurrent programming ：java Memory model , Concurrent sets , Thread pool , Blocking queues ,CAS And atomic manipulation , Lock free concurrency framework Disruptor etc.

**Spring piece ：**spring IOC,spring AOP principle ,spring 5,springMVC, Business management , Cyclic dependence ,spring Design mode, etc

[ Failed to transfer the external chain picture , The origin station may have anti-theft chain mechanism , It is suggested to save the pictures and upload them directly (img-Ky1kfkot-1653907045762)(https://upload-images.jianshu.io/upload_images/26747438-903900ebeade8b3b.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)]

Mysql piece ：SQL Execution principle , The underlying indexing mechanism ,SQL Perform plan analysis ,Mysql Locking mechanism ,Mysql The transaction isolation ,SQL Optimization Practice

SpringCloud： Service discovery and registration Eureka And Nacos, Service current limiting fuse is degraded Hystrix And Sentinel, Distributed transactions Seata, gateway Gateway

Dubbo piece ：Dubbo Basics , Architecture design , colony , To configure , Communication protocol ,SPI etc.

Redis piece ：Redis Core data structure ,Redis Persistence mechanism and security mechanism , Sentinel and cluster architecture ,Redis Cache penetration , Cache invalidation , Cache avalanche ,Redis Cache design and performance optimization ） Here I would like to recommend an architecture learning exchange circle . Exchange learning guidance pseudo Xin ：1253431195（ There are a lot of interview questions and answers ） It will share some videos recorded by senior architects ： Yes Spring,MyBatis,Netty Source code analysis , High concurrency 、 High performance 、 Distributed 、 Principles of microservice architecture ,JVM performance optimization 、 Distributed architecture and other necessary knowledge systems for Architects . You can also get free learning resources , Now it's been a lot of good

Distributed article ： The principle of distributed architecture , Cluster architecture principle , Distributed lock , Distributed transactions , Distributed protocol , Distributed configuration , Massive data is divided into databases and tables , Distributed scheduling

Design patterns ： The singleton pattern , Factory mode , Abstract factory pattern , Builder pattern , Archetypal model , Adapter pattern , Decorator mode , Agent mode, etc 23 Design patterns

Data structure and algorithm ： Red and black trees ,B+ Trees , Greedy Algorithm , Hash divide and conquer , Seven search algorithms , Dynamic programming , Consistency algorithm

The second part : Detailed information display

• java Programming performance tuning

• Multithreading performance tuning

• JVM Performance monitoring and tuning

• Design pattern tuning

• Database performance tuning