UGC NET COMPUTER SCIENCE SOLVED QUESTION AND ANSWERS FOR DECEMBER 2015

     UGC NET COMPUTER SCIENCE SOLVED QUESTION AND ANSWERS FOR DECEMBER 2015                                                                                                                                                                                                             1. The process of dividing an analog signal into a string of discrete outputs, each of constant amplitude is called

A. Strobing
B. Amplification
C. Conditioning
D. Quantization

Ans.: D

2.       which of the following is not a basic primitive of the graphics kernel system(GKS) ?

       A.   POLYLINE
B. POLYDRAW
C. FILL AREA
D. POLYMARKER

Ans.: B

 3. 

   Match the following

List-I	List-II
Flood Gun	An electron gun designed to flood the entire screen with electrons.
Collector	Partly energised by flooding gun, stores the charge generated by the writing gun
Ground	used to discharge the collector
Phosphorus Grains	used in memory -tube display and similar to those used in standard CRT
Writing Gun System	used in memory -tube display and basically the same as the electron gun used in a conventional CRT.

Codes : (a) (b) (c) (d) (e)

A.            (i) (ii) (iii) (iv) (v)

B.            (ii) (iii) (i) (iv) (v)

C.            (iii) (i) (ii) (v) (iv)

D.            (iv) (v) (i) (ii) (iii)

Ans.: A

4. Which transmission technique guarantees that data packets will be received by the receiver in the same order in which they were sent by the sender ?

A.            Broadcasting

B.            Unicasting

C.            Packet Switching

D.            Circuit Switching

Ans.: D

 5. Which are the two modes of IP security ?

A.            Transport and Certificate

B.            Transport and Tunnel

C.            Certificate and Tunnel

D.            Preshared and Transport

Ans.:B

 6. All pair Shortest paths problem is efficiently solved using :

A.        Dijkstra' algorithm

B.        Bellman-Ford algorithm

C.        Kruskal Algorithm

D.        Floyd-Warshall algorithm

Ans.:D

7. The travelling salesman problem can be solved in :

A.        Polynomial time using dynamic programming algortihm

B.        Polynomial time using branch and bound algortihm

C.        Exponential time using dynamic programming algorithm or branch and bound algorithm.

D.        Polynomial time using backtracking algorithm.

Ans.:C

8. In Java, when we implement an interface method, it must be declared as :

A.        Private

B.        Protected

C.        Public

D.        Friend

Ans.:C

9. The Servlet Response interface enables a servlet to formulate a response for a client using the method ______

A.        void log(Exception e, String s)

B.        Void destroy()

C.        int getServerPort()

D.        void setContextType(String Type)

Ans.:D

10. In XML, Doctype declaration specifies to include a reference to ____ file

A.        Document Type Definition

B.        Document Type Declaration

C.        Document Transfer Definition

D.        Document Type language

Ans.:A

11. Module design is used to maximize cohesion and minimize coupling. Which of the following is the key to implement this rule ?

A.        Inheritance

B.        Polymorphism

C.        Encapsulation

D.        Abstraction

Ans.:C

12. Verification :

A.        refers to the set of activities that ensure that software correctly implements a specific function.

B.        gives answer to the question - are we building the product right ?

C.        requires execution of software

D.        both A and B

Ans.:D

13. Which design metric is used to measure the compactness of the program in terms of lines of code ?

A.        Consistency

B.        Conciseness

C.        Efficiency

D.        Accuracy

Ans.:B

14. Adaptive maintenance is a maintenance which ______

A.        Correct errors that were not discovered till testing phase.

B.        is carried out to port the existing software to a new environment.

C.        improves the system performance.

D.        both (2) and (3)

Ans.:B

15. 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

16. Match the following for operating system techniques with the most appropriate advantage :

List-I	List-II
(a) Spooling	(i) Allows several jobs in memory to improve CPU utilization
(b) Mult iprogramming	(ii) Access to shared resources among geographically dispersed computers in a transparent way
(c) Time sharing	(iii) overlapping I/O and computations
(d) Distributed Computing	(iv) Allows many users to share a computer simultaneously by switching processor frequently

codes : (a) (b) (c) (d)

A.        (iii) (i) (ii) (iv)

B.        (iii) (i) (iv) (ii)

C.        (iv) (iii) (ii) (i)

D.        (ii) (iii) (iv) (i)

Ans.:B

  17. Which of the following statements is not true for Multi Level Feedback Queue processor scheduling algorithm ?

A.        Queues have different priorities.

B.        Each queue may have different scheduling algorithm

C.        Processes are permanently assigned to a queue

D.        This algorithm can be configured to match a specific system under design

Ans.:C

18. What is the most appropriate function of Memory Management Unit (MMU) ?

A.        It is an associative memory to store TLB

B.        It is a technique of supporting multi programming by creating dynamic partitions

C.        It is a chip to map virtual address to physical address

D.        It is an algorithm to allocate and deallocate main memory to a process

Ans.:C

  19. Dining Philosopher's problem is a

A.        Producer Consumer problem

B.        Classical IPC problem

C.        Starvation Problem

D.        Synchronization Primitive

Ans.:B

20. A unix file may be of type :

A.        Regular file

B.        Directory File

C.        Device File

D.        Any one of the above

Ans.:D

ALL THE BEST FOR THE EXAM.