In the era of programmers' introspection, five-year-old programmers are afraid to go out for interviews

It's all about now Java The interview is getting more and more difficult , It's business to JAVA The demand for personnel is higher and higher .

At the initial stage of development, an industry is in great need of human and material resources , The expansion with good prospects is faster and larger , It can also be called barbaric growth , Especially in the Internet industry . The Internet has developed in our country, but 20 A few years , But at present, the Internet penetration rate in China has reached 67.0%, Scale of Internet users 9.40 Billion , It can be seen how fast it expands , How big is the market . Due to the popularity of the Internet computer industry , In addition, the threshold for entry in the early stage of industry development is not high , Countless computer professionals or non computer professionals have joined in , Regardless of Technology , There are a steady stream of suitable and sufficient positions . The Internet industry was once a place where everyone tried their best , Pass college courses , Or participate in social training , Or self-study , All want to enter the high paying industry , But they are mainly filled with basic technical posts , For example, yard farmer , Junior development engineer .

And in these two years , The whole Internet industry tends to be relatively stable , The development technology system is mature and complete , The division of labor of each post is more refined , Job requirements are also higher , And low skilled jobs are becoming saturated , Enterprises need more middle-end and high-end talents . Secondly, the market changes faster and faster , Technology update , Users have higher and higher requirements for software quality . In the general environment of market and industry development , It requires developers to have excellent technology and high professional quality , To meet the changing needs of customers . Now it is no longer the era when you can write code and do development well , It requires more systematic and comprehensive talents , Excellent skills and good learning ability , Education level .

Second, from the Java Developers' own career development , Entered the Internet industry , It does not mean that the post is permanently stable , In particular, most people are basically yard farmers in the early stage ,Java Junior development engineer , We still need to continue learning to read , Consult the technical boss , In order to stabilize and even have post promotion . Technology itself is constantly updated , It requires our developers to constantly learn new technologies based on the technologies they have mastered , On the one hand, improve yourself , On the other hand, it is better to meet the needs of the market and users , Make better products . Secondly, start from the individual , No one wants to stay in one position all the time , Also want to improve salary , Especially in popular industries , Fresh blood continues to enter , Superior bad discard , If you don't study, you will eventually be eliminated , and Java Development technology position , Developers need to concentrate more energy and time , To put it bluntly, we need young people , If you stay where you are , Can only be replaced .

Java Language is still the most widely used development language , Its own logical thinking requires high , Employees need to have a certain learning ability , If the educational level of beginners is too low , It's basically difficult to master , Generally, you can learn a beginner and come out to be a yard farmer . In the long run , If you don't have enough education , Without any learning ability , Development will not be very good , We can consider changing to a less technical direction . Development is no better than testing , The longer you work at the testing position, the more popular it will be , The long-term development position is to be a medium and high-end technical talent . Now it is not only enterprises that have high requirements for developers , We should be more demanding of ourselves , To keep up with the development of the enterprise , The needs of users .

therefore , The times are developing , Technology is improving , Or just master the primary skills and want to earn a high salary , That ability is still far from enough , I think the interview is getting more and more difficult , It's time to improve yourself , As an old programmer who has worked for five years, I'm afraid that I can find a job after leaving , Today, I take this opportunity to share with you one of my own Java Interview information , This information not only contains the interview questions of major manufacturers, but also Java Various knowledge points , Next, let's show you the brain map of knowledge points in detail + Each interview topic + answer ！

JVM

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Java aggregate

Multithreaded concurrency

Java Basics

Spring principle

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Netty and RPC

The Internet

Zookeeper

Kafka

RabbitMQ

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database

Consistency algorithm

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JAVA Algorithm

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data structure

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Hadoop

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About the full version Java Core development growth manual , If you are interested and want to learn, please give me some praise, pay attention and support , Follow my background private message sending “ Core development ” that will do