NTA UGC-NET Computer Science July 2018 - Paper II

Question 1

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1. The definitions in an XML document are said to be __________ when the tagging system and definitions in the DTD are all in compliance.

Options:

1. (1) well-formed
   
2. (2) reasonable
   
3. (3) valid
   
4. (4) logical
   

View Question 1 Explanation

Answer : ( 3 )

Question 2

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2. Consider the JavaScript Code :

  var y= ’’12”;
  function f( ) {
      var y=’’6”;
      alert (this.y);
      function g( ) {alert (y); }
      g( );
  }
  f( );

If M is the number of alert dialog boxes generated by this JavaScript

code and D1, D2, ....,DM represents the content displayed in each of the M dialog boxes, then :

Options:

1. (1) M=3; D1 displays ”12”; D2 displays ”6”; D3 displays ”12”.
2. (2) M=3; D1 displays ”6”; D2 displays ”12”; D3 displays ”6”.
3. (3) M=2; D1 displays ”6”; D2 displays ”12”.
4. (4) M=2; D1 displays ”12”; D2 displays ”6”.

View Question 2 Explanation

Answer : ( 4 )

Question 3

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3. What is the output of the following JAVA program ?
class simple
{
     public static void main(String[ ] args)
    {
         simple obj = new simple( );
         obj.start( );
    } 
   void start( ){
         long [ ] P= {3, 4, 5};
         long [ ] Q= method (P);
         System.out.print (P[0] + P[1] + P[2]+”:”);
         System.out.print (Q[0] + Q[1] + Q[2]);
   }
   long [ ] method (long [ ] R)
         {
         R [1]=7;
         return R;
   }
} //end of class

Options:

1. (1) 12 : 15
2. (2) 15 : 12
3. (3) 12 : 12
4. (4) 15 : 15

View Question 3 Explanation

Answer : ( 4 )

Question 4

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4. What is the output of the following ‘C’ program ?
(Assuming little - endian representation of multi-byte data in which Least Significant Byte (LSB) is stored at the lowest memory address.)

#include <stdio.h>
#include <stdlib.h>
/* Assume short int occupies two bytes of storage */
int main ( )
{
         union saving
         {
         short int one;
         char two[2];
         };
         union saving m;
         m.two [0] = 5;
         m.two [1] = 2;
         printf(’’%d, %d, %d\n”, m.two [0], m.two [1], m.one);
}/* end of main */

Options:

1. (1) 5, 2, 1282
2. (2) 5, 2, 52
3. (3) 5, 2, 25
4. (4) 5, 2, 517

View Question 4 Explanation

Answer : ( 4 ) 5, 2, 517

Question 5

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5. Given below are three implementations of the swap( ) function in C++ :

(a)	(b)	(c)
void swap(int a, int b) {    int temp;    temp = a;    a = b;    b = temp; } int main() {   int p = 0, q = 1;   swap(p, q); }	void swap(int &a, int &b) {    int temp;    temp = a;    a = b;    b = temp; } int main() {  int p = 0, q = 1;  swap (p, q); }	void swap(int *a, int *b) {    int * temp;    temp = a;    a = b;    b = temp; } int main() {  int p = 0, q = 1;  swap (&p, &q); }

Which of these would actually swap the contents of the two integer variables p and q ?

1. (1) (a) only
2. (2) (b) only
3. (3) (c) only
4. (4) (b) and (c) only

View Question 5 Explanation

Answer : (2) (b) only

Question 6

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6. In Java, which of the following statements is/are True ?
S₁ : The ‘final’ keyword applied to a class definition prevents the class from being extended through derivation.
S₂ : A class can only inherit one class but can implement multiple interfaces.
S₃ : Java permits a class to replace the implementation of a method that it has inherited. It is called method overloading.

Code :

1. (1) S₁ and S₂ only
2. (2) S₁ and S₃ only
3. (3) S₂ and S₃ only
4. (4) All of S₁, S₂ and S₃

View Question 6 Explanation

Answer : (1) S1 and S2 only

Question 7

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7. Which of the following statements is/are True ?
P : C programming language has a weak type system with static types.
Q : Java programming language has a strong type system with static types.

Code :

1. (1) P only
2. (2) Q only
3. (3) Both P and Q
4. (4) Neither P nor Q

View Question 7 Explanation

Answer : (3) Both P and Q

Question 8

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A graphic display system has a frame buffer that is 640 pixels wide, 480 pixels high and 1 bit of color depth. If the access time for each pixel on the average is 200 nanoseconds, then the refresh rate of this frame buffer is approximately :

1. (1) 16 frames per second
2. (2) 19 frames per second
3. (3) 21 frames per second
4. (4) 23 frames per second

View Question 8 Explanation

Answer: (1) 16 frames per second

Question 9

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9. Which of the following statements is/are True regarding the solution to the visibility problem in 3D graphics ?
S₁ : The Painter’s algorithm sorts polygons by depth and then paints (scan - converts) each Polygon on to the screen starting with the most nearest polygon.
S₂ : Backface Culling refers to eliminating geometry with backfacing normals.

Code :

1. (1) S₁ only
2. (2) S₂ only
3. (3) Both S₁ and S₂
4. (4) Neither S₁ nor S₂

View Question 9 Explanation

Answer : (2) S2 only

Question 10

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10. Consider the matrix  M=

2	0	0
0	1	0
0	1	1

representing a set of planar (2D) geometric transformations in homogeneous coordinates. Which of the following statements about the matrix M is True ?

1. (1) M represents first, a scaling of vector (2, 1) followed by
   translation of vector (1, 1)
2. (2) M represents first, a translation of vector (1, 1) followed by
   scaling of vector (2, 1)
3. (3) M represents first, a scaling of vector (3, 1) followed by
   shearing of parameters (−1, 1)
4. (4) M represents first, a shearing of parameters (−1, 1) followed by
   scaling of vector (3, 1)

View Question 10 Explanation

Answer: (2) M represents first, a translation of vector (1, 1) followed by scaling of vector (2, 1)

Question 11

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Assume the following regarding the development of a software system P :

- Estimated lines of code of P : 33, 480 LOC
- Average productivity for P : 620 LOC per person-month
- Number of software developers : 6
- Average salary of a software developer : ` 50,000 per month

If E, D and C are the estimated development effort (in person-months), estimated development time (in months), and estimated development cost (in ` Lac) respectively, then (E, D, C) =_________.

Options:

1. (1) (48, 8, 24)
2. (2) (54, 9, 27)
3. (3) (60, 10, 30)
4. (4) (42, 7, 21)

View Question 11 Explanation

Answer : (2) (54, 9, 27)

Question 12

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12. Match the following in Software Engineering :

List - I	List - II
(a) Product Complexity	(i) Software Requirements Definition
(b) Structured System Analysis	(ii) Software Design
(c) Coupling and Cohesion	(iii) Validation Technique
(d) Symbolic Execution	(iv) Software Cost Estimation

Code :

	(a)	(b)	(c)	(d)
(1)	(ii)	(iii)	(iv)	(i)
(2)	(iii)	(i)	(iv)	(ii)
(3)	(iv)	(i)	(ii)	(iii)
(4)	(iii)	(iv)	(i)	(ii)

Options:

1. (1)
2. (2)
3. (3)
4. (4)

View Question 12 Explanation

Answer: (3)

Question 13

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13. Which one of the following is not typically provided by Source Code Management
Software ?

Options:

1. (1) Synchronisation
2. (2) Versioning and Revision history
3. (3) Syntax highlighting
4. (4) Project forking

View Question 13 Explanation

Answer : (3) Syntax highlighting

Question 14

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14. A software system crashed 20 times in the year 2017 and for each crash, it took 2 minutes to restart. Approximately, what was the software availability in that year ?

Options:

1. (1) 96.9924%
2. (2) 97.9924%
3. (3) 98.9924%
4. (4) 99.9924%

View Question 14 Explanation

Answer : (4) 99.9924%

Question 15

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Match the 5 CMM Maturity levels/CMMI staged representations in List- I with their
characterizations in List-II :

List - I	List -II
(a) Initial	(i) Processes are improved quantitatively and continually.
(b) Repeatable	(ii) The plan for a project comes from a template for plans.
(c) Defined	(iii) The plan uses processes that can be measured quantitatively.
(d) Managed	(iv) There may not exist a plan or it may be abandoned.
(e) Optimizing	(v) There’s a plan and people stick to it.

Code :

	(a)	(b)	(c)	(d)	(e)
(1)	(iv)	(v)	(i)	(iii)	(ii)
(2)	(i)	(ii)	(iv)	(v)	(iii)
(3)	(v)	(iv)	(ii)	(iii)	(i)
(4)	(iv)	(v)	(ii)	(iii)	(i)

Options:

1. (1)
2. (2)
3. (3)
4. (4)

View Question 15 Explanation

Answer : (4)

Question 16

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16. Coupling is a measure of the strength of the interconnections between software modules. Which of the following are correct statements with respect to module coupling ?

P : Common coupling occurs when one module controls the flow of another module by passing it information on what to do.

Q : In data coupling, the complete data structure is passed from one module to another through parameters.

R : Stamp coupling occurs when modules share a composite data structure and use only parts of it.

Code :

1. (1) P and Q only
2. (2) P and R only
3. (3) Q and R only
4. (4) All of P, Q and R

View Question 16 Explanation

Answer : (3) Q and R only

Question 17

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17. A software design pattern often used to restrict access to an object is :

Options:

1. (1) adapter
2. (2) decorator
3. (3) delegation
4. (4) proxy

View Question 17 Explanation

Answer : (4) proxy