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1st December 2015, 08:53 AM
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Join Date: Apr 2013
Re: UGC NET Operating System

As you want I am here giving you sample questions for Operating System subject for UGC NET computer science stream paper.

Sample paper :

1. If the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O blocks requests are 98, 37, 14, 124, 65, 67.
A. 239
B. 310
C. 321
D. 325

2. Which of the following memory allocation scheme suffers from external fragmentation ?
A. Segmentation
B. Pure demand paging
C. Swapping
D. Paging

3. Consider a system having m resources of the same type. These resources are shared by 3 processes A, B and C which have peak demands of 3, 4 and 6 respectively. For what value of m deadlock will not occur ?
A. 7
B. 9
C. 10
D. 13

4. Pre-emptive scheduling is the strategy of temporarily suspending a running process
A. before the CPU time slice expires
B. to allow starving processes to run
C. when it requests I/O
D. to avoid collision

5. Resources are allocated to the process on non-sharable basis is
A. mutual exclusion
B. hold and wait
C. no pre-emption
D. circular wait

6. In round robin CPU scheduling as time quantum is increased the average turn around time
A. increases
B. decreases
C. remains constant
D. varies irregularly

7. Pool based allocation of memory achieves better usage. Memory can be preempted from inactive programs and used to accommodate active programs. This is called
A. Preemption
B. Swapping
C. Spooling
D. Scheduling

8. Which of these is an example of a virtual resource?
A. Print server
B. Virtual machine
C. Virtual memory
D. All of the above

9. Which concept explains the working of an Operating System?
A. It is event driven
B. It is object oriented
C. It is procedure based system software
D. It is a collection of procedures that interact with each other

10. Which of these is/are the desirable features of an Operating system
A. Extensible
B. Portable
C. Reliable
D. All of the above

11. Blocking and Caching are the terms associated with which Operating system functions respectively
A. Memory management and Disk Scheduling
B. IOCS and Disk Scheduling
C. IOCS and Memory management
D. Process management and IOCS

12. Which of these is not a term describing the collection of Operating Programs
A. Monitor
B. Kernel
C. Supervisor
D. Server

13. Transparency is a desirable feature of which type of Operating system-
A. Batch Processing
B. Real time
C. Distributed
D. Time sharing

14. Which operating system implementation has to focus on the issue of Good response time
A. Batch Processing
B. Multiprogramming
C. Distributed
D. Time sharing

15. Program Priorities, Preemption are the key concepts of
A. Batch Processing
B. Real time
C. multiprogramming
D. Time sharing

16. Which operating system implementation has to focus on the issue of resource sharing?
A. Batch Processing
B. Multiprogramming
C. Distributed
D. Time sharing

17. This OS interleaves execution of processes in an application program to meet its deadline
A. Batch Processing
B. Real time
C. multiprogramming
D. Time sharing

18. What in multiprogramming OS provides a foolproof method of implementing memory protection to avoid program interference?
A. Direct Memory Access
B. Privileged mode
C. Memory Protection
D. Both 2 and 3

19. What are the functions of multiprogramming OS?
A. Scheduling
B. Memory Management
C. I/O management
D. All of above

20. Applications like Banking and reservations require which type of OS?
A. Real Time
B. Hard Real Time
C. Soft Real Time
D. None of the above


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