Sunday 21 August 2016

UGC NET COMPUTER SCIENCE SOLVED MODEL PAPER FOR DECEMER 2016

UGC  NET COMPUTER SCIENCE SOLVED MODEL PAPER FOR DECEMER 2016
1. Consider an arbitrary set of CPU-bound processes with unequal CPU burst lengths submitted at the same time to a computer system. Which one of the following process scheduling algorithms  would minimize the average waiting time in the ready queue?
(a) Shortest remaining time first
(b) Round-robin with time quantum less than the shortest CPU burst
(c) Uniform random
(d) Highest priority first with priority proportional to CPU burst length
Ans.: a

2. Match the following :
List – I                        List - II
(A) Boot block (i) Information about file system
(B) Super block (ii) Information about file
(C) Inode table (iii) Storage space
(D) Data block (iv) Code for making OS ready
Which one is true?
(a) (A)-(iv), (B)-(i), (C)-(ii), (D)-(iii)
(b) (A)-(i), (B)-(ii), (C)-(iv), (D)-(iii)
(c) (A)-(iv), (B)-(ii), (C)-(i), (D)-(iii)
(d) (A)-(i), (B)-(iii), (C)-(ii), (D)-(iv)
Ans.:a

3. A page fault means that we referenced a page
(a) outside the memory boundaries (b) with an incorrect I/O request
(c) that was not insecondary storage (d) that was not in main memory
Ans.:d


4. A binary search tree is a binary tree
(a) all items in the left subtree are less than root
(b) all items in the right subtree are greater than or equal to the root
(c) each subtree is itself a binary search tree
(d) all of the above
Ans.:d

5. Which one of the following algorithm design techniques is used in finding all pairs of shortest distances in a
graph?
(a) dynamic programming (b) Backtracking
(c) Greedy (d) Divide and Conquer
Ans.:a

6. Which of the following sorting algorithms has a running time that is least dependent on the initial ordering of the
input?
    (a)   insertion sort (b) merge sort (c) quicksort (d) selection sort
Ans.: b

7. Main aim of software engineering is to produce program
(a) program (b) software
(c) wihtin budget (d) software within budget in the given schedule
Ans.:d

8. If a process is under statistical control, then it is
(a) maintainable (b) measurable (c) predicatable (d) verifiable
Ans.:c

9. Reliability of software is directly dependent on
(a) quality of the design (b) number of errors present
(c) software engineer experience (d) user requirement
Ans.: b

10. Basis path testing falls under
(a) system testing (b) white box testing (c) black box testing (d) unit testing
Ans.: b
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11. The factors that determine the quality of a software system are
(a) correctness, reliability (b) Efficiency, usability maintanability
(c) testability, portability, accurracy, error tolerances, expendiability, access contro, audit
(d) all of the above
Ans.:a

12. A design concept refinement is a
(a) top-down approach (b) complementary of abstraction
(c) process of elaboration (d) all of the above
Ans.:a

13. A software design is highly modular if
(a) cohesion is functional and coupling is data type
(b) cohesion is coincidental and coupling is data type
(c) cohesion is sequential and coupling is content type
(d) cohesion is functional and coupling is stamp type.
Ans.:a

14. The ‘nice’ command is used in UNIX
(a) to decrease nice value (b) to increase nice value
(c) to get highest priority (d) none of these
Ans.: b

15. Which command is used to change the access time of file without opening it
(a) cat (b) touch (c) acces (d) at
Ans.: b

16. What is ‘chmod 764’ command means
(a) user get read permission only
(b) user get read and write. Other get all permission
(c) user get all permission. Other get read permission
(d) none of these
Ans.:d

17. Which one of the following statements is correct?
(a) if a linear programming problem (LPP) is infearible, then its dual is also infeasible
(b) if an LPP is infeasible, then its dual always has unbounded solution
(c) if an LPP has unbounded solution, then its dual also has unbounded solution then its dual is infeasible
(d) if an LPP has unbounded solution then its dual is infeasible.
Ans.:d

18 The objective function of an LPP is
(a) a constraint (b) a function to be optimized
(c) a relation between the variable (d) none of these
Ans.:b

19. The occurence of degeneracy while solving a transportation problem means that
(a) total supply equals total demand (b) total supply does not equal total demand
(c) the solution so obtained is not feasible (d) none of these
Ans.:c


20 Which memory device is generally made of semi-conductors ?
      (a)   RAM (b) Hard-disk (c) Floppy disk (d) Cd disk
Ans.:a

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