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Q. Why is it complicated to protect a system in which users are allowed to do their own I/O?
Answer: In earlier chapters we identified a distinction among kernel and user mode where kernel mode is utilized for carrying out privileged operations such as I/O. One reason why I/O should be performed in kernel mode is that I/O requires accessing the hardware as well as proper access to the hardware is necessary for system integrity. If we permit users to perform their own I/O we can't guarantee system integrity.
Several schemes available are as follows: Pipes : One-way communication process through which different process can interact. The problem is that the two processes could have
What are the advantages of Contiguous allocation? The advantages are a. Supports direct access b. Supports sequential access c. Number of disk seeks is minimal.
what is process creation and how to create a process
How does user specify block to be fetched in direct access? By specifying the relative block number, relative to first block in file, which is block 0.
How Memory utilization factor shall be computed Memory utilization factor shall be defined as Memory in use/total memory connected
Explain internal fragmentation The Internal fragmentation signifies to the result of reserving a piece of space without ever intending to use it. This space is wasted that this
What is an operating system? An operating system is a program that acts as a mediator between a user and the computer hardware. The function of an operating system is to provid
Q. Describe the purpose of the open() and close() operations. Answer: The open() operation notifies the system that the named file is about to become active. The c
Program of Calculator and Controller with the fork, exec, and wait system calls The objective of this assignment is to get you to be comfortable with the fork(), exec(), and wai
Remote IT Support Engineer Windows Systems Administrator Project Description: Need Windows base IT Support Engineer / Systems Network Administrator - perfectly MCSE qualified
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