Programmers can't JVM? Ashes Engineer: all waiting to be eliminated! This is a must skill!

jvm Since its birth , Although it has a long history , however ： It is still a skill that every programmer should master .

Why do you say that ？

• Whether you're the front end 、 Back end 、APP Development 、AI、 Testing and even operation and maintenance , As long as the database is involved , Then you must use jvm.

• Internet development to today , Not only R & D needs to be jvm, Even many products 、 Operations have also begun to use jvm. For example, check the number of clicks on a page 、 Click through rate and so on .

• Business people are beginning to use jvm 了 , If the development will not ？ Is it a little unreasonable ！

• If you often visit recruitment websites , It's not hard to find out , Almost all R & D Posts require jvm！ If you don't jvm, Even the best programming language , The interview will inevitably be rejected

jvm Not at all , How to be a programmer ？

I'm learning jvm Have you ever encountered these problems when you were ：

1. Why my count(*) So slowly ?

2. Why did I index , But it didn't work at all ?

3. Why do I only look up one line of statements , It's so slow ?

Technical side （ Based on the foundation ）

 

 

Two sides of Technology （ database , Basic , I still don't remember some questions ）

 

On three sides （ Locking is mainly viewed from a dynamic point of view ）

 

Four sides

Interview summary

When it comes to interviews , There are pits everywhere , So , Recently, Xiaobian specially sorted out and summarized a whole set of interviews and notes sharing , For your reference .

If you are interested in this whole set of interview and note sharing , You can get it free by private mail ！

• The first is my notes

（1） Interview notes （ Unlike the core notes circulating online ）：

If this article helps you , Don't forget to give me a 3 even , give the thumbs-up , forward , Comment on ,

I'll see you next time ！

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