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Preparation for gold three silver four: how to successfully get an Ali offer (experience + interview questions + how to prepare)

2022-08-09 10:47:00 【InfoQ】

Let's share with you some of our experience in autumn recruitment and some suggestions for autumn recruitment, mainly to share:

Ali's interview experience (not the author himself)

Interview questions and analysis

How to prepare for gold and silverFour

Ali's interview experience:

Generally, Ali's recruitment is to recruit 3-5 years of P6+ senior engineers.Years of experience did not expect to have this interview opportunity.

Although I don’t think about changing jobs, I often pay attention to the information of some recruitment websites. One day, someone on a boss asked me to send me my resume.It seems to be a technical expert from Alibaba. Although someone from Alibaba asked me for a resume from a boss before, but I knew that I was inexperienced, and told the boss that I was in the 17th class with only two years of experience, and then there was no more..This time I still replied like this, but the boss said, it doesn't matter, he likes a good foundation, so I can give it a try, so I also sent my resume with the mentality of giving it a try.

After the resume was sent, the boss called me and asked me to briefly introduce myself. I just said some things and said some off-topic.Then the boss started asking me questions.

Because of the four rounds of interviews, my memory of the first interview is a bit blurry, but I think about it carefully, and I feel that my memory is still fresh.

Interview questions and analysis (three technical aspects):

One side:

Introduce yourself, talk about your job search intention and skills

What is the basic architecture of Tomcat?

JVM tuning, how to use it at work, what are the GC algorithms and recovery strategies

How is the thread pool implemented in Java?What are the several core construction parameters for creating a thread pool?

What is the difference between Volatile and Synchronize?

What is the mechanism of GC?Is the basic principle of the garbage collector still said?Is it possible to reclaim memory immediately?How to actively notify the JVM for garbage collection?

Classloader parent delegation model mechanism?

The types and differences of collections, how to implement the bottom layer of HashMap (changes in JDK1.8), and the difference between HashMap and ConcurrentHashMap?

How does Spring IOC manage dependencies between beans and how to avoid circular dependencies?

Design patterns during SpringBean creation?

Two sides:

Self-introduction,

What are the names of the four transaction isolation levels supported by InnoDB?What is the difference between ?

Let's talk about the features of transactions

What isMySQL isolation level?

How to understand the BTree mechanism?

Talk about the analysis of slow queries?What are the commonly used optimization methods for MySQL?

Talk about pessimistic locking and optimistic locking and the implementation of SQL

Briefly describe the process of three-way handshake and four-way handshake?

The difference between B+ tree index and Hash index?

Three sides:

Introduce yourself

MySQL lock concurrency?

How to prevent deadlock and ensure data consistency in high concurrency scenarios?

Algorithms and implementations of clustering and load balancing?

Briefly describe the design of sub-database and sub-table?

What are the distributed dilemmas and corresponding countermeasures brought about by sub-database and sub-table?

What is the locking mechanism?

How do Redis and Setnx commands implement distributed locks?How to use Redis for asynchronous queue?What are the disadvantages?

If there are three technical aspects, I will remember so much for the time being. If there are any mistakes, please correct me. In order to prepare for the interview, I also brushed a lot of real interview questions.Collected a large number of classic interview questions of major manufacturers.Also share with you, you need

1080 2019 classic java interview questions

and

450 first-line Internet factory interview questions

friends can

+V MXD202007

1080 2019 classic java interview questions:

450 real interview questions of first-line Internet companies:

How to prepare for the gold nine silver ten:

First of all, we must be clear like Ali,The social recruitment of big companies such as Baidu and Tencent generally requires three to five years of experience. If you only come out of school, we have to prepare for the school recruitment. Today we will focus on how to prepare for the social recruitment.I don't have much advice for you. If you are recruiting from the community, you need to be skilled. Let me share with you the learning and thinking route of knowledge points.

Spring Learning Mind Map (xmind):

JVM learning mind map (xmind):

mybatis learning mind map (xmind):

Concurrent programming learning mind map (xmind):

Summary:

Show home some technical knowledge of Java core such as spring, JVM, mybatis, and concurrent programmingThere are also some learning routes about microservices, performance optimization, and open source frameworks that are not all shown to you. Because the picture is too large, the details of the knowledge points that may be displayed are not clear enough. You need a source high-definition learning route map.

+V MXD202007

Finally, I wish you all the best of luck in the new year!!!

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