Barkatullah University 2009 B.Sc Computer Science Operating System - Question Paper

Time : three Hours Maximum Marks : 50

1. (a) What is Operating System? discuss.
(b) discuss evolution of operating system.
Or (a) discuss the kinds of operating system.
(b) What is Multiprogramming? discuss.

2. What is the relation ranging from the subsequent pairs of CPU Scheduling Algorithms?
(1) FCFS and Round Robin (2) Priority and SJF
Or (a) What is prevention and recovery? discuss.
(b) What is deadlock avoidance? discuss.

3. How to decrease the effective memory-access-time in a paged system? discuss.
Or (a) What is virtual memory concept? discuss.
(b) What is non-contiguous allocation? discuss.

4. (a) What is disk space management? discuss.
(b) What is address translation? discuss.
Or (a) What is disk organisation? discuss.
(b) What is disk controller? discuss.

5. (a) What is device management? discuss.
(b) What is vertical devices? discuss.
Or (a) discuss security, policies and mechanism.
(b) What is Authentication protection? discuss.

Earning:   Approval pending.