UGC NET COMPUTER SCIENCE SOLVED PAPERS 2014-16 - UGC NET Computer Science Paper 2 August 2016

6. The octal number 326.4 is equivalent to

  • Option : C
  • Explanation : To solve this question we will apply traditional approach:
    (326.4)8 = 82 * 3 + 81 * 2 + 80 * 6 . 8-1 * 4 = ( 214.5)10 is decimal representation.
    For hexadecimal representation group binary sequence of (214.5) = (011010110.100)2 into group of 4.
    i.e. 0 1101 0110. 1000 (0 can be padded after decimal) this is equivalent to- (D6.8)16.
    So, option (C) is correct.
Cancel reply
Cancel reply

7. Which of the following is the most efficient to perform arithmetic operations on the numbers?

  • Option : C
  • Explanation :
    Sign's magnitude is only for sign convention (MSB is 1 then no is negative and if 0 then no is positive).
    Main difference is that while adding numbers using 1′ s complement, we first do binary addition, then add in an end-around carry value.
    But, 2′ s complement has only one value for zero, and doesn’t require carry values.
    9’s complement of a decimal number is the subtraction of it’s each digits from 9.
    Like 1’s complement, 9’s complement is used to subtract a number using addition.
    2's complement representation is unambiguous for 0 (i.e., only positive 0), but Sign-magnitude, 1’s complement and 9’s complement are ambiguous representation for 0 (i.e., both positive and negative 0).
    So, option (C) is correct.
Cancel reply
Cancel reply

9. Which of the following logic operations is performed by the following given combinational circuit?

Aug2016 cs

  • Option : A
  • Explanation :

    F is EXCLUSIVE-OR between X and Y. So, option (A) is correct.
Cancel reply
Cancel reply

10. Match the following:

List IList II
a. Controlled Inverteri. a circuit that can add 3 bits
b. Full adderii. a circuit that can add two binary numbers
c. Half adderiii. a circuit that transmits a binary word or its 1's complement
d. Binary adderiv. a logic circuit that adds 2 bits

Codes:

 abcd
(1)iiiiiivi
(2)iiiviiii
(3)iiiiviii
(4)iiiiivii

  • Option : D
  • Explanation :
    Controlled Inverter is a circuit that transmits a binary word or its 1’s complement. Full adder is a circuit that can add 3 bits. Half adder is a logic circuit that adds 2 bits. Binary adder is a circuit that can add two binary numbers. So, option (D) is correct.
Cancel reply
Cancel reply