30 knowledge topics that must be asked in 2021 gold three silver four JAVA interviews (this is enough for the interview)

Today’s article is divided into two parts:

1. Ali P9 promotion hidden rules and methodology
2. Alibaba's internal Java growth notes

Some readers asked me before, do you have to enter a big factory to do technology?

Of course not, big and small factories are also a common topic. Generally speaking, each has its own advantages and disadvantages, but if there is a chance to join a big factory, it will always do no harm to give preference to a big factory.

First of all, the salary of the big factory is not bad; secondly, with the resume of the big factory, there will be more choices when changing jobs in the future, and the strength will be easier to be recognized; finally, the big factory has a complete promotion mechanism within the company. Salary is also a good life choice.

However, the competition for talents from big companies is fierce, and it is not so easy to get promoted, such as:

1. People who are not as good as mine have been promoted, and I am still standing still. Is there any "doorway" here?
2. I want to be promoted but I dare not apply, because I am afraid I won’t be ashamed. How do I prepare for my promotion defense?
3. Obviously prepared well, why can't the goods be poured out when you reply, and your brain is short-circuited when you ask a question?
4. Why do some people know all the judges when they reply, but when it's my turn, the judges don't know any of them?

I have not only encountered these problems myself, but many friends around me have discussed with me and even complained about them. But I found that no one has introduced promotion systematically, even those mature large companies have formulated relevant regulations, systems, and procedures, but most of them are supplementary explanations of the rules, which are of little help to guiding practice.

In fact, behind the promotion system, there are many artificial control rules that cannot be clearly written in black and white. To get better career development, you must understand the "hidden rules" behind the system and the operating mechanism of promotion, interpret clear requirements from the vague job description, and get the approval of supervisors and judges.

At the same time, we must actually improve our abilities, not just professional skills, such as design and development, testing, online assurance, etc.; but also the ability to do things, such as reporting, review, and collaboration capabilities. , Both hands must be hard."

Here, I will share with you a set of former Ali P9 promotion methodology , covering the complete promotion chain of "understanding promotion→preparing for promotion→participating in promotion→getting promotion" .

 

Ali Java growth notes

In addition to the above soft skills and ideas, programmers are of course based on technology. It is recommended to study Ali’s Java growth notes benchmarking the P7 knowledge system. The Java growth notes can do the following:

• You can learn through a system to solve the problem of not knowing where to start, and how to start?
• Establish a systematic learning system, where each knowledge point is independent and connected?
• Review and summarize the interview sites of major factories, and proceed from their own reality to understand the gap between the talents required by the company and the talents required by the company?

This Ali Java growth note is a very comprehensive summary, including 29 knowledge points, from basic to advanced! Part of the content is displayed due to space limitation, and friends who need the full version can get it for free [see the picture below to add a small assistant];

When I saw this manual, I felt very conscientious. JVM, multithreading, Spring family bucket, microservices, network, message middleware, data structure, algorithm, distributed, etc. all include:

List of catalogs:

Jvm+Java collection+Java multi-thread concurrency

 

Java basics + Spring principles + microservices

 

Netty and RPC+Network+Log+ZK+Kafka+RabbitMQ

 

Hbase+MongoDB+Cassandra+ design pattern

 

Load balancing + database + consensus algorithm + Java algorithm

 

Data structure + encryption algorithm + distributed cache + Hadoop

 

Spark+Storm+YARM+Machine Learning+Cloud Computing

 

Content display

• Multithreading

 

• Spring

 

• Microservice

 

• Load balancing

 

• Spark

 

• cloud computing

 

to sum up

No matter which company you are in, technical people can only go one step at a time, and lay a solid foundation to go further. I hope that the above-mentioned "hidden rules" and "Java growth notes" will help you in your career and avoid getting lost in 35 In the middle-aged crisis;