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Computer 11

Computer 11

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Quiz Questions And Answers

Dirty bit for a page in a page table

Allows only read on a page
Helps maintain LRU information
Helps avoid unnecessary writes on a paging device
None of these

Multiprocessor is used because

Distributed capability
They increase reliability
It saves money compared to multiple single systems
All of these

Thrashing

Can be caused by poor paging algorithms
Always occur on large computers
Can always be avoided by swapping
Is a natural consequence of virtual memory system

A computer has six tape drives, with n processes competing for them. Each. process may need two drives. What is the maximum value of n for the systems to be deadlock free?

3
4
5
6

Which of the following is not an advantage of multiprogramming?

Decreased operating system overhead
Ability to assign priorities to jobs
Shorter response time
Increased throughput

Spooling is most beneficial in multi-programming environment where

There is limited primary memory and need for secondary memory
Jobs are evenly divided as 1/0 bound and CPU bound
Most jobs are 1/0 bound
Most jobs are CPU-bound

Most popular 16-bit. operating system is

TRS-DOS
MS-DOS
CP/M
UNIX

Which of the following operating system write through catches?

ULTRIX
XENIX
DOS
UNIX

User-friendly systems are

Easy to develop
Required for batch-oriented processing
Becoming more common
Common among traditional mainframe operating systems

A critical section is a program segment

Which must be enclosed by a pair of semaphore operations, P and V
Where shared resources are accessed
Which avoids deadlocks
Which should run in a certain specified amount of time
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