I’m going, the mind map for the Java interview is all ready for you, take it away
Posted Jun 16, 2020 • 4 min read
Like, take a look, good habits! This article GitHub https://github.com/OUYANGSIHAI/JavaInterview has been included, this is the first-tier Java interview that I spent 3 months to summarize In summary, I have already offered a big factory offer.
In addition, the original article was first published on my personal blog: blog.ouyangsihai.cn , welcome to visit.
Hello everyone, I have met with you again. I am very happy to share some Java-related knowledge with you. I have not shared the video for a long time. In the last issue, I shared a non-curriculum student, or I have never been exposed to the Java industry. If you are a practitioner, how can you enter the Java industry faster, and through some of your own learning methods, find a satisfactory job faster.
In this issue, I want to introduce some of the problems in finding a job in more detail.
We all know that in the process of looking for a job, you need to review a lot of knowledge, a lot of technology, a lot of knowledge points, then how these knowledge points are more clear when talking to the interviewer, I will introduce a method here.
During the interview, during the review, I organized many knowledge points into a mind map, for example, jvm, multi-threading, database, data network, these related pieces I will classify and summarize it into a mind map. Today I want to share with you some of the mind maps I have compiled. I also hope that it will help you in the interview process in the future.
As you can see from the picture above, this is how I organized some knowledge points related to jvm into a mind map. Each point is listed very clearly. The knowledge points that I will encounter during the interview have been sorted out. It s very clear. If you have this mind map, you don t have to panic if you encounter some jvm related questions during the interview. First of all, you have some knowledge about jvm. At the same time, if you have such an entire mind map of jvm, your thinking is relatively clear, then the interviewer will definitely think that you are a jvm You have a good grasp of relevant knowledge, so that you will increase your confidence in the interview, and at the same time will be more confident.
In addition, I have written original articles on these knowledge and explained them in a more systematic way. You can take a look at them and you will gain something.
In this case, I felt that during interviews, collection really asked a lot during the interview. During each interview, you will basically encounter interview questions related to collection, such as list and set. Needless to say, the most basic set is basically asked. The other question most asked is HashMap. HashMap asks a lot during interviews, no matter which big factory, he will basically ask you HashMap, there are some abnormal questions, and even let you implement a HashMap, just let you implement a HashMap during the interview, Or you talk about how you can implement a HashMap. In fact, this question is still relatively difficult. If you don t know the whole HashMap, it is still more difficult to answer.
In addition, in addition to HashMap, of course it is ConcurrentHashMap, which is also a necessary knowledge point for interviews. If you do not, then you will definitely be ruined by the interviewer in some interviews.
The last one is a thread-safe collection, and I don t need to say more about this one. These are all asked a lot during the interview. You must master them well. Here are all summarized for you. Other words may be more detailed. to sum up.
As for the last piece, this is what I asked during the interview, and I encountered a particularly large number of questions, that is, some knowledge about multithreading, the synchronized keyword, from which aspects to answer, the volitale keyword, from What aspects to answer, how to develop, what is the thinking, how to answer to make the interviewer satisfied?
There is some knowledge about JUC, for example
- The difference between ReentrantLock and synchronized, ReentrantLock in the interview-how to answer the interviewer s question,
- What knowledge points of AQS can be asked, what is the concept of CAS? How will the interviewer ask CAS questions during the interview?
The last word is the famous thread pool. This knowledge point is also asked a lot during the interview. I basically ask some knowledge about the thread pool during each interview with the big factory. For example:
- What is the Java thread pool and what are the parameters
You have to explain clearly one by one, otherwise, he will not ask what parameters the Java thread pool has, what is the meaning, how to use these parameters in the face of actual problems, but it will let you design a Thread pool, in fact, this kind of thinking is the same as explaining these basic parameters to you.
I will introduce so many related knowledge points in this issue, and I will see you in the next issue.
Finally, if you need these mind maps, you can scan the following QR code and reply to my public account:Mind Map, you can get the source files of the mind map, original It's not easy, please like it.
Finally, I will share the Java interview + Java back-end technology learning guide which was summarized in three months. This is a summary of my past few years and spring strokes. I have obtained a big factory offer and organized it into An e-book, thank you for taking it, the directory is as follows:
Now for free to share with everyone, below my public number programmer's technical circle reply interview can be obtained.