operating systems from scratch part 1 udemy download

Any program which CPU wants to execute has to be present inside the RAM. Ok! See, Why are we actually moving the program from hard disk to RAM is different.

as a result of which we are able to use the software, as we are using today. Right! That program will be fetched by the CPU line by line. ok! And for execution The program will be moved from Hard disk to RAM. ok! For example: If you're using MS-WORD Now Microsoft should have written a program for MS -WORD, and that program will be stored inside your hard disk. ok! That is how the problem of human beings are solved today.! See any software. This CPU ( Central Processing Unit ), the chip will take the program line by line or instruction by instruction and then it will execute it. OK.! We will store the program inside the memory. In order to solve the problem of human beings, We write programs. Computers work on the basis of 'stored program concept'. ok! The second most important memory system is Hard disk! We also use other memory systems like cache, registers and all these. But apart from that, there are various types of memory. Actually we mean RAM (random access memory). We have various levels of memory in our computer. The second most important device is nothing but memory.

That is one important hardware device we use in our computer. Fine! Now the main functionality of our computer system is nothing but execution by the CPU (central processing unit ). A collection of instructions are also called as a program. ok ? You can think of it like a line of a program. An instruction is nothing but a part of a program. CPU needs to execute an instruction for it. Ok ! Any operation you do in your computer is being done by. what this CPU will do is! It will fetch the program from the memory and then it will execute it. Ok! Programs will be stored inside the RAM or memory. OK ? See the most important part in our computer is. Hardware means, we use hardware devices in our computer. Now to solve this problem we use hardware. Ok.! For example: Let us assume, I want to edit my photograph ok!. ok ? software's and programs, both mean one and the same. ok ? By saying 'We use a computer system', I mean we use hardware devices some software. ok! All these are problems of human beings.

Ok! For example: I wanted to access a webpage. OK.? See as a user, we want to solve our problems. it is a combination of hardware, software and data which are used to solve the problem of human beings. Let's first see, what is meant by a computer system! OK.? See! A computer system is nothing but.

Operating systems from scratch part 1 udemy download