U.G.C. NET Exam. Dec. 2020-June 2021 Paper II (COMPUTER SCIENCE & APPLICATIONS)

Total Questions: 100

81. Match List-I with List-II

Correct Answer: (b) A ‐ II, B ‐ I, C ‐ IV, D ‐ III
Solution:A ‐ II, B ‐ I, C ‐ IV, D ‐ III

82. The Octal equivalent of hexadecimal (D.C)₁₆ is:

Correct Answer: (a) (15.6)₈
Solution:(15.6)₈

83. A digital computer has a common bus system for 8 registers 16 bits each. How many multiplexers are required to implement common bus? What size of multiplexers is required?

Correct Answer: (a) 16, 8x1
Solution:

N = 8, K = 16
If there are 'N' number of K-bit registers
then, No. of mux = K = 16
Size of mux = N×1 = 8×1

84. Which of the following is not an example of pseudo‐instruction?

Correct Answer: (d) HLT
Solution:

HLT
Pseudo - instruction :-
⇒ do not perform any operation on data
⇒ giving some into to the a sembler
⇒ 4 Pseudo - instn,
ORG → origin
END Dec → decimal HEX

85. The reverse Polish notation of the following infix expression [A*{B+C*(D+E)}] / {F*(G+H)} is__________.

Correct Answer: (a) ABCDE+*+*FGH+*/
Solution:ABCDE+*+*FGH+*/

86. Arrange the following in the increasing order of complexity.

A. I/O Module
B. I/O processor
C. I/O Channel
D. DMA
Choose the correct answer from the options given below 

Correct Answer: (d) A, D, C, B
Solution:I/O Module<DMA< I/O channel< I/O processar.

87. The characteristics of the combinational circuits are:

A. Output at any time is function of inputs at that time
B. Contains memory elements
C. Do not have feedback paths
D. Clock is used to trigger the circuits to obtain outputs
Choose the correct answer from the options given below:  

Correct Answer: (c) A and C only
Solution:A and C only

88. The cache coherence problem can be solved

A. by having multiport memory
B. allow only nonshared data to be stored in cache
C. using a snoopy cache controller
D. uisng memory interleaving
Choose the correct answer from the options given below:

Correct Answer: (b) B and C only
Solution:B and C only

89. Given below are two statements

Statement I: CISC computers have a large of number of addressing modes.
Statement II: In RISC machines memory access is limited to load and store instructions.
In light of the above statements, choose the correct answer from the options given below:

Correct Answer: (a) Both Statement I and Statement II are true
Solution:Both Statement I and Statement II are true

90. Which of the following statement is true?

A. Control memory is part of the hardwired control unit.
B. Program control instructions are used to alter the sequential flow of the program.
C. The register indirect addressing mode for accessing memory operand is similar to displacement addressing mode.
D. CPU utilization is not affected by the introduction of Interrupts.

Correct Answer: (b) B
Solution:

Program Control instruction :-The program control instructions control the flow of
program execution and are capable of branching to different program segments. Some of the program control instructions are listed in the table.