Operating system knowledge

Thinking at the beginning:

What do you think at the first glance of the title? What is the operating system? What does it do? In fact, this question is due to the fact that there is such a Q & A in the self-examination. What is the impact of the operating system on the computer? I should be impressed with this question! Think carefully. How did you answer the question?

 

First impression:

I first thought of code 01 and some difficult machine commands when I was doing that short answer. In fact, it would be much easier to think of these commands if they are good at summing up, does this make it easy for users to access computers? That is, the man-machine interface is improved, and the user's work efficiency is improved;

So what is an operating system? The operating system can effectively organize and manage various software and hardware resources in the system, Reasonably organize the work flow of the computer system, and control program execution, it also provides users with a good working environment and friendly interfaces.

Apart from improving human-machine interfaces, operating system tasks can also improve the efficiency of computer systems!

In-depth introduction:

Note:

* Similarities and differences between real-time systems and time-sharing systems:

	Design Objectives	Strong interactivity	Sensitivity of response time
Real-time	Dedicated System	Weak	Strong (latency acceptable to objects under test)
Time-sharing	Universal multi-user system	Strong	Weak (acceptable waiting time)

* What is the relationship between network operating systems and distributed systems?

A Distributed System is a more advanced form of network operating systems. It maintains all the functions of the network system, while ensuring transparency, reliability, and high performance. The biggest difference between the two is that the network system users must know the website, while the distributed system does not have to know the exact address of the computer and is responsible for allocating resources throughout the system.

* The five major parts of the operating system work with each other to coordinate the work. What is the point? In fact, there may be questions in every place! For example, in November, the first question was "in the input/output control method, which of the following can be used to transmit data between the device and the primary storage without CPU intervention? This question requires an understanding of the buffer technology!

By drawing a mind map, each chapter has a rough outline. By doing this, you can understand each question, each section, and each knowledge point! Complement each other.

Conclusion:

In fact, from the grade exam in July-The soft exam in July, I was really scared and did not know how brave I was at the beginning, actually linked to the soft exam, but as shehe said: no matter what the situation is, since you have already reported, you have to read the book with a mandatory attitude, review, consolidate ...... The Study of the Level Test laid a good foundation for the basic network knowledge in the soft test. The review of the self-test is also the content of the soft test. It would be much easier if you think so, the only difference is that there are just a few more tests here, but for you with full confidence, of course they are all small cases!

Operating system knowledge