Recently, many people have asked me in private letters : For a few years Java engineer , I'm confused now , I want to change jobs, but I don't feel confident enough , I don't know what to do .

As a highly qualified Java
development , I have interviewed many people in recent years . Found that most interviewers , Although it seems to work hard , But their ability level , But not enough to pass the interview , Or get the expected salary . If your current technical level is not enough to support salary increase , Then it is recommended not to change jobs !

in my opinion , What caused this , There are two main aspects : 

first ,“ Know what it is, don't know why ”. For several years , Developed some business applications , But I haven't thought about the logic behind these technology choices . therefore , It's hard for me to locate their future growth potential , I won't trust them with a certain depth of tasks .

second , Knowledge fragmentation , Unsystematic . in fact , When the interviewer cannot complete , When clearly describing the system developed or relevant technologies used , The interviewer will doubt his ability to solve complex problems , Ability to design complex systems .

therefore , If you just work hard , Or pay too much attention to an implementation detail , I haven't looked up at these technologies , So when preparing for the interview , It's necessary to sort it out Java
Knowledge system , Only in this way can we win satisfactory results Offer.

here , Share a column that helped me a lot 《 Ali internal Java Interview notes 》 It's said to be an Ali 10 Summed up by the boss in

Not much , Direct dry goods ( The presentation part takes Ali's interview outline as an example ) Receive the full version at the end of the document

  one , Distributed

* Characteristics of large website system  
* Evolution and development of large website architecture
* split VS colony
* Microservices VS SOA
* The front and rear ends are completely separated from each other Rest standard
* CAP Three into two and Base theorem

two , middleware  

* cache
* Message queue
* Search Engines

three , Big data and high concurrency

*
Second kill architecture design

*
Development history of database architecture

*
MySQL Scalability bottlenecks

*
Why use NOSQL   NOT ONLY SQL

*
tradition RDBMS VS NOSQL

*
NOSQL Type of database

*
How to store commodity information in Alibaba Chinese station

*
Horizontal and vertical splitting of data

*
Distributed transaction x ,BitMap

*
Bloom Filter

*
Common current limiting algorithms

*
load balancing

*
uniformity Hash algorithm

four , database

*
Database paradigm

*
Database development specification

*
Database index

*
MySM  VS  InnoDB

*
Problems caused by concurrent transactions

*
Transaction isolation level and lock implementation mechanism

*
MVCC( Multi version concurrency control )

*
Gap lock and unreal reading

five , Design pattern and Practice

*
OOP Five principles SOLID

*
Design pattern

*
proxy pattern

*
Aspect oriented programming (AOP)

*
Factory mode

*
Control reversal IOC

*
Observer mode

*
Zookeeper



six , Data structure and algorithm

*
Data structure and algorithm

*
HashMap

*
ConcurrentHashMap

*
ConcurrentLinkedQueue

*
Topk problem

*
Resource pool idea

*
JVM Memory management algorithm

*
Container virtualization technology ,Doocker thought

*
Continuous integration , Continuous release ,jenkins

seven , Examples of interview questions

*
Design a globally unique transmitter in distributed environment

*
Design a with expiration time LRU cache

*
Design a distributed lock

*
Design a unified configuration center in distributed environment

*
How to prepare HR interview

last

The whole document has nearly 200
page , It must be unrealistic to show it all to everyone , In order not to affect everyone's reading experience, only part of the content is displayed , I hope you will forgive me , I hope it can help you review before the interview and find a good job , It also saves you time to study by searching information on the Internet !

All resources mentioned in the text , It's all free to share with my fan friends , Harmony is too serious now , Dare not send network disk links directly ( Don't get me wrong , You won't pay for it under the name of free ) Thank you for your understanding

 

 

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