Basic knowledge Review Series

The main reason for writing this series is that I recently changed my job. During the interview, I found that my foundation was poor. Many of the knowledge points I should know were unclear, but I did not know much about it, now the work is stable, and the next step is to systematically learn the basic knowledge.

The so-called basic knowledge is actually

2. The difference between an abstract class and an interface.
4. The difference between the value type and the reference type.
6. Enumeration and constants.
8. Class and structure.
10. The characteristics of object-oriented and why it should be object-oriented.
12. What are the HTTP object interfaces? An instance is often used.
14. Session, Cookie, application, viewstate, and Cache
16. Page Lifecycle

The above questions are only known, but not in-depth understanding. When the interviewer asks in-depth questions, he does not know why. In fact, he did not know the questions. When he learned C #, he learned, it was only at that time that the level was limited and I could not understand why I wrote it like this. What are the advantages of this writing? It is only superfluous for beginners.CodeIt's still easy to write. Now, a few years have passed. It's time to get to know more about it. If it's nothing else, it's easy to understand and maintain high-quality code (for these basics, different people have different understandings, and the results are different. What I write is my opinion. If there is any deviation, it is only my opinion ).

When I was studying, I always avoided these problems. I didn't need to work on projects. Why do I need to learn this? The code I have written is almost the same. I just need to know one of them, there is no need to make it clear that these are actually interfaces, and the root cause is that they cannot understand these knowledge points. More importantly, they do not know where these knowledge points can be used. Now they have several years of experience, after looking at the basic knowledge, we can find that this knowledge has become more important, because various types of frameworks will be used during project development.Source codeThe source code design is closely related to the basic knowledge. Without such basic knowledge, you will be lost when you are looking at the source code.

When I think it is time to learn these difficult knowledge points that are not easy to understand and use, it is best to study them in depth. Simply learning, forgetting, and failing to understand the essence, only when your own level reaches a certain levelProgramIn order to truly know the importance of these knowledge points (at least I have experienced this, and different people have different experiences ).

I will write down all the problems I encountered during the interview. On the one hand, I want to learn, and on the other hand, I will give some reference to my colleagues who are looking for a job.