Zero, preface,

Yue say four golden nine silver ten, I went to the interview at the end of yue four wave, will be here before the interview and I’ve used as reference to prepare the main points of the information to summarize, in this golden nine silver ten, give you a reference, hope you can find a satisfactory job, achieve their little at an early date!

Began in March (the actual possible earlier), and began to prepare the written interview, brush algorithm (up to now, or the sum of two Numbers), read the source code (points a lot of this to me), and also spent time in some underlying, in short, for the interview is essential for public, few words said, directly into the theme, it mainly summarizes some high frequency in front of the pilot, It is mainly to go deep into the bottom layer, to understand the source code, more may be referenced before the reference material and video, others summarized in detail. In addition, links to download the latest interview materials will be provided at the end of the article.

A basis,

Blog.csdn.net/v123411739/… , the blogger’s article gave me a lot of help, this is the basic knowledge part, covering data structure, multithreading, JVM and other knowledge, you can refer to it

[1] Data structure

Jdk7 / JDK8 / infinite loop/ConcurrentHashMap/ConcurrentHashMap HashMap: HashMap: HashMap: HashMap: HashMap: HashMap: HashMap

Article: joonwhee.blog.csdn.net/article/det…

Video: www.bilibili.com/video/BV1kJ… .

[2] Multi-threading

Thread pooling is a must, and juC-related, ThreadLocal is also a fairly high frequency. There are also some videos and articles recommended here

The thread pool article: joonwhee.blog.csdn.net/article/det…

ThreadLocal article: www.zhihu.com/question/34…

JUC video: www.bilibili.com/video/BV1Kw…

【 3 】 the JVM

Virtual machine memory model, JVM garbage collection mechanism, parent delegation mechanism, a little bit deeper JMM memory model, instruction rearrangement, memory barriers, etc., this is the open course I have seen before, now on site B, the content is very good, but a little too much advertising

Video: www.bilibili.com/video/BV155…

[4] Singleton mode

In the design mode, you will not be asked about singletons directly. Sometimes you will be asked to write three singletons in the written test. However, questions about synchronized and volatile singletons will also be asked in the interview. I also give an article and a video. The article is summarized based on the video and my own understanding, so you can refer to it:

Article: In-depth understanding of singleton pattern (QQ.com)

Video: www.bilibili.com/video/BV1K5…

Ii. Database

[1] MySQL optimization

This video is a little bit old, 18 years old, but it’s still pretty good. If you don’t know much about MySQL optimization before, you can use it for reference

Article: blog.csdn.net/qq_35642036…

Video: www.bilibili.com/video/BV1KW…

[2] Basic principles of MySQL

Because of the volume, only understanding optimization has no advantage, can explain the MySQL data structure, the underlying principle clearly, will be a plus point, also recommend the article and video, are more in-depth, the video is also seen before the open course, it is really ok, but a little too much advertising

Article: blog.codinglabs.org/articles/th…

Video: www.bilibili.com/video/BV1Xh…

[3] MySQL lock

Also, articles and videos are recommended here. The articles are about locks, and videos are about transactions and locks for reference

MySQL lock article: blog.csdn.net/qq_40378034…

MySQL affairs and lock video: www.bilibili.com/video/BV1x5…

Three, framework,

Framework is the Spring family bucket, are based on Spring, so focus on Spring here involved in the problem will be more, ask deep will be source level, Spring source I spent more time, but also find a lot of tutorials, give me a deep impression is Teacher Zi Lu (there will be a link to his video), Pick out some of the more important question here is deep into the source code to understand, as for other basic problem can refer to this article: blog.csdn.net/v123411739/…

[1] Spring annotates the underlying source code

This video is quite long, from the annotation level to understand the source code, including IOC and AOP, read and follow the end of the source code will absolutely harvest, I also summarized the article according to the video, can be referenced

Article: blog.csdn.net/one_l_star/…

Video: www.bilibili.com/video/BV1gW…

[2] Bean life cycle

The life cycle of Bean should not be superficial, otherwise the interviewer will directly send you back to wait for the notice, or you need to go deep into the source code to understand, here I recommend Teacher Zi Lu’s video, in addition, I have sorted out an article according to the video and my own understanding, for reference

Article: Spring Bean lifecycle source code detail – [Spring underlying principle] (qq.com)

Video: www.bilibili.com/video/BV1L5…

[3] Spring’s cyclic dependency

Cycle dependence is usually answered in conjunction with the life cycle. Here I recommend two videos, the first is a detailed explanation, the second is a summary explanation, and you can use the second answer in the interview

A detailed version: www.bilibili.com/video/BV1ET…

The summary version: www.bilibili.com/video/BV1Ga…

[4] SpringBoot automatic assembly source code

This video starts with the pre-knowledge of SpringBoot, which is not very long, but useful

Video: www.bilibili.com/video/BV1yr…

[5] SpringBoot source code analysis

Recommended is the same teacher’s course, after reading can press the interviewer on the ground friction, of course, to understand

Video: www.bilibili.com/video/BV1pa…

Four, distributed

There is little knowledge about microservices, but distributed transactions and distributed locks are recommended here

A distributed transaction article: zhuanlan.zhihu.com/p/183753774

Article: distributed lock blog.csdn.net/xlgen157387…

5. Middleware

【 1 】 Redis

Articles and videos are also recommended, because there are many questions involved in the articles. After all, if Redis continues to ask questions, it is a bottomless pit. The video is my new find, feel good, I will share with you, from the source level to understand Redis, interview time and the interviewer hand tear source code, that should be very cool

Redis high-frequency interview questions: joonwhee.blog.csdn.net/article/det…

Redis the underlying principle of the video: www.bilibili.com/video/BV1Jq…

【 2 】 RocketMQ

There are many kinds of message-oriented middleware. I have used RocketMQ before, so I recommend this message-oriented middleware. I can’t find a good video

RocketMQ: blog.csdn.net/qq_27641935…

Because I am pretty good, ability is limited, yue four information reference in breadth and depth has some limitations, there are a lot of knowledge not involved, especially the distribution service and middleware, I itself is not much, use of this knowledge is lack, so the summary is not very in place, but the knowledge points listed above, basic involves the underlying source code, For one or two years of work experience partners or more able to play, the principle of understanding, hand tear source code, coupled with project experience, it is best to brush the algorithm, so into the factory is not a big problem. I lack project experience and algorithm, but I also got an offer from a large factory based on the above eight-part essays, so seize the opportunity and achieve my small goal as soon as possible. I hope the above summary can be helpful to everyone. Good luck!

Sharing interview materials

Finally, share the latest interview materials, including video, PDF, dACHang interview questions, from the basic to the framework and then to the bottom, you can choose to learn according to their weak points, there is no routine, directly share to everyone

Link: pan.baidu.com/s/1zcUhAuCP… Extraction code: 9E9R

Bookmark this article if you found it useful, and next time we’ll explain how to write a resume that will impress your interviewer and share a template. Click “Watching”, let more people see!