At this time last year, I just finished the Spring Recruitment . In the Spring Recruitment, although my foundation was fairly solid, but I was so proud and arrogant . There were a lot of knowledge points. Difficulties may be possible, but simple ones are not so good. Yes, and many details have been forgotten. The end result is that Chun recruited several companies and all failed miserably.
Through the Spring Recruitment, I learned about some of my shortcomings . So, starting from June, I began to organize my knowledge systematically. Let’s not talk about that much. This time I reviewed 9 core knowledge. I think this knowledge is likely to be asked, which 9 specific subjects are, you can look down
Due to the limited space, the knowledge points cannot be fully displayed here, and the small partners who need it can add the assistant vx: bjmsb10 after three consecutive sessions, and then they can be directly packaged and taken away.
1. Computer network
In the interview, there are really many questions about the knowledge of computer networks, and there are really many protocols involved, such as http, https, tcp, udp, arp, icmp, three-way handshake, four waved hands, and so on. Especially in the interview with Dachang, the computer network must be asked
There is too much content, so the picture is blurry, and I still have a lot of content that is not expanded. When it is expanded, it is even more scary. About the original files of these maps and notes, the method of obtaining them will be given at the end of the article
2. Algorithm
There are really a lot of questions about algorithms, such as quick sorting algorithm, Hill sorting algorithm, process scheduling algorithm, etc. I was asked n times in the interview, and it is recommended to focus on review. This time the editor came to a big summary
3、MySQL
MySQL is basically necessary. The most frequently asked questions are indexes, locks, optimization methods, and some commands, such as checking the execution plan of sql, etc., the difference between engines, the advantages and disadvantages of auto-incrementing primary keys, and B+ tree and many more.
4、spring
When I recruited Tencent in spring, I hung up several times, and I think it was related to spring. When I asked about spring, I asked three questions, and I guessed wrong several times. Here I will analyze the 25 high-frequency interview questions as the entry point for everyone.
5. JAVA basics
6、JVM
To learn Java, JVM is a must, and it is also a lot of knowledge points asked in the interview. The one that JVM asks the most about is the garbage collection section. This section involves a lot of details. In order to review this section, I read the book "In-depth Understanding of Jv Virtual Machine" several times and bought two columns. Finally, Separately sorted out this JVM note
If you can be like me, the JVM interview is basically safe, if it is not safe, then you have to tune it yourself
7 、 Redis
Redis must also be started. Many projects now basically use redis. Redis is actually very simple to use and there is no difficulty. However, it involves a lot of theories, including interviews for shipbuilding. Work screwing. If you can only use Redis, you don't know how it works. I'm afraid there is no chance to screw the screws. In order to get Redis, see what I reviewed
8. Message queue
At that time, message queues were used in my project, so in order to cope with the interview, I read a lot of knowledge points such as message queues, distributed locks, sub-databases and sub-tables, but there was no way to add points for the interview. It can be said that a lot of theoretical knowledge has been sorted out
However, during the interview, no interviewer asked me about the principle of distributed and various message queues, crying, I was in this part, but spent a lot of time...
9. Performance optimization related
When the scale of our website is relatively large, at this time, we need to consider a lot, and we need a variety of optimizations, such as caching, database sub-table, load balancing, etc. Regarding the issue of website size, In fact, I have also been asked several times. For example, when we usually visit Zhihu, sometimes a certain question will be very popular, and it will become hundreds of millions of times. How will we come out of this problem? How to optimize?
In order to let myself have some ideas when I was asked in the interview, I also read some knowledge about website optimization, but I didn’t sort it out very much, only sorted out a little bit.
The information that helped me get Ali P7offer has been compiled for everyone! ! If you need a small partner, you can add assistant vx: bjmsb10 after three connections and you can pack it away directly
If you are interested, you can optimize on my basis.
Of course, there must be more than this to learn. MongoDB, Spring, Spring Boot, Spring Cloud, RabbitMQ, Dubbo, MyBatis, ZooKeeper, data structure, etc. are all to be learned. These painstakingly organized knowledge points are given to my readers for free ，Repost and follow the private message 【Note】, you can get it for free.
to sum up
The spring recruitment is over. Don't get discouraged if you don't get your favorite internship offer, learn your lesson, and just keep working hard.
I hope everyone, whether it is social recruitment or school recruitment, can get your favorite offer! The information has been prepared for you~ If you need a small partner, you can add the assistant vx: bjmsb10 after three consecutive sessions and you can pack it away directly