운영체제 연습문제 2장

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운영체제 연습문제 2장 조선대학교 이준 교수님꺼!!

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2.1 The services and functions provided by an operating system can be
divided into two main categories. Briefly describe the two categories
and discuss how they differ.
Answer: One class of services provided by an operating system is to
enforce protection between different processes running concurrently in
the system. Processes are allowed to access only thosememory locations
that are associated with their address spaces. Also, processes are not
allowed to corrupt files associated with other users. A process is also not
allowed to access devices directly without operating system intervention.
The second class of services provided by an operating system is to
provide new functionality that is not supported directly by the underlying
hardware. Virtual memory and file systems are two such examples
of new services provided by an operating system.
2.2 List five services provided by an operating system that are designed to
make it more convenient for users to use the computer system. In what
cases it would be impossible for user-level programs to provide these
services? Explain.

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