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  #1  
May 20th, 2015, 02:36 PM
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UGC NET Operating System Questions

I have completed B.Tech in Computer Science and want to prepare for UGC NET (University Grants Commission - National Eligibility Test) so please provide me Previous Years Question Papers of UGC NET for Operating System Subject?

As you asking I am providing UGC NET Operating System subject Questions 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
21. What feature of RTOS is supported by executing parts of a computation in different computer systems?
A. Computation speed up
B. Resource sharing
C. Reliability
D. Communication


22. Which OS employs the techniques of fault tolerance and graceful degradation to ensure continuity of operation?
A. Batch Processing
B. Real time
C. Distributed
D. Time sharing


23. 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


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


25. 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


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


27. 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


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


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


30. Which operating system implementation has to focus on the issue of Good response time
A. Batch Processing
B. Multiprogramming
C. Distributed
D. Time sharing
31. Program Priorities, Preemption are the key concepts of
A. Batch Processing
B. Real time
C. multiprogramming
D. Time sharing


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


33. 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


34. 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


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


36. 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


37. What feature of RTOS is supported by executing parts of a computation in different computer systems?
A. Computation speed up
B. Resource sharing
C. Reliability
D. Communication


38. Which OS employs the techniques of fault tolerance and graceful degradation to ensure continuity of operation?
A. Batch Processing
B. Real time
C. Distributed
D. Time sharing


39. If ttra and tcam are the time taken to transfer a block from memory to cache and access time of cache memory respectively, then what will be the effective memory access time if h is the hit ratio
A. h+ ttra *(1+ tcam)
B. h*tcam +(1-h) *(ttra+tcam)
C. h +(1-h) *(ttra+tcam)
D. (h+1)*tcam +(1-h) *(ttra+tcam)


40. Programs tend to make memory accesses that are in proximity of previous access this is called
A. spatial locality
B. temporal locality
C. reference locality
D. access locality
41. Which term means to access some data and instructions repeatedly?
A. spatial locality
B. temporal locality
C. reference locality
D. access locality


42. Processor architectures use several levels of cache memories to reduce the effective memory access time. which is the correct match i)L1 Cache a) part of memory chip ii)L2 Cache b) Cache on CPU Chip ii)L3 Cache c) Cache external to CPU
A. i)-a ii)-b iii)-c
B. i)-b ii)-c iii)-a
C. i)-c ii)-b iii)-a
D. i)-c ii)-a iii)-b


43. An Intel processor uses a cache block size of 128 bytes and a memory transfer to cache is about 10 times the access time of cache memory. with cache hit ratio of 0.97 what percent will be the effective memory access to that of access time of memory
A. 20 percent
B. 30 percent
C. 40 percent
D. 50 percent


44. Contents of which fields of Program Status Word (PSW) define the subsequent actions of the CPU
A. Condition code, Privileged mode, Program Counter
B. Condition code, Privileged mode, interrupt mask
C. Privileged mode, interrupt mask, interrupt code
D. Privileged mode, interrupt mask, Program Counter


45. Which of the following should be a privileged instruction-
A. Load Bound registers
B. Load a value in a CPU Register
C. Forcibly terminate a process
D. All of the above


46. Throughput of a multiprogramming OS that processes n programs over th eperiod of time that starts t0 and ends at tf is
A. (tf-t0)/n
B. tf*n/t0
C. n/(tf-t0)
D. n*tf*t0


47. Which of these are the reasons for CPU-bound programs having higher priority than the I/O bound programs
A. CPU utilization is better in CPU-bound programs
B. I/O bound programs do not get an opportunity to be executed
C. Period of concurrent CPU and I/O bound activities is rare.
D. All of the above


48. Which of these is incorrect in context of Real Time Operating System?
A. Permits creation of multiple processes within an application.
B. Permits priorities to be assigned to the processes.
C. Doesn't allow programmer to define interrupts and interrupt processing routines
D. Provides fault tolerance and graceful degradation capabilities.


49. Which of these is not a goal of Scheduling Algorithm for Different Operating Systems
A. Fairness
B. balance
C. maximize throughput
D. Policy enforcement


50. Which of these is a disadvantage of first Come First Serve?
A. Convoy Effect
B. Small average and worst-case waiting times
C. Simplicity
D. non-preemptive

Last edited by Neelurk; April 28th, 2020 at 07:31 AM.
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  #2  
February 21st, 2017, 11:09 AM
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Re: UGC NET Operating System Questions

Hi buddy here I have come to get UGC NET Operating System subject Questions paper so would you plz provide me same here ??


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