What are the three major purposes of an operating system, Operating System

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Q. What are the three major purposes of an operating system?

Answer:

To offers an environment for a computer user to execute programs on computer hardware in a convenient and efficient manner.
To allocate the part resources of the computer as needed to solve the problem given. The allocation process must be as fair and efficient as possible.
Like a control program it serves two major functions: (1) regulation of the execution of user programs to prevent errors and improper use of the computer and (2) management of the operation as well as control of I/O devices.

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