Page 348 - GMAT 2017b_Neatb

Computer Literacy Test 1

50. Decimal equivalent of (F9A . BC3) is (C) (10101.11) = (25.6)
16 2 8
(A) (3995.7351074) (D) (110110101) = (655)
10 2 8
(B) (3996.7351075)
10
(C) None of A, B 59. Positive logic in a logic circuit is one in which
(D) (3994.7351074) (A) logic 0 and 1 are represented by 0 and positive
10
voltage respectively.
51. (0.8125) in binary is (B) logic 0 and 1 are represented by negative and
10
positive voltage respectively.
(A) (0.1101) 2 (C) logic 0 voltage level is higher than logic 1
(B) (0.1100) 2 voltage level.
(C) (0.1100)
2 (D) logic 0 voltage level is lower than logic 1
(D) (0.1011) 2 voltage level.

52. Which logic gate is similar to the function of two 60. Boolean expression for Nand gate is
parallel switches? (A) A + B = y
(A) And (B) AB = y
(B) Nand (C) A Å B = y
(C) OR (D) None of the above
(D) NOR
61. A combination of AND function and NOT function
53. Which logic gate is similar to the function of 2 series results in
switches? (A) OR gate
(A) And (B) Inversion
(B) OR (C) NAND gates
(C) NAND (D) NOR gates
(D) All of the above
62. Which of the following is incorrect?
54. (62) in binary system is (A) 11101 + 10 = 1101
10
(A) 110000 (B) (8) + (2) = (11) 8
8
8
(B) 111100 (C) (8) + (7) = E
16
16
(C) 111110 (D) All of them are incorrect
(D) 111111
63. In case of OR gate, no matter, what the number of
55. According to the boolean Algebra inputs, a
1 + A + B + C is equal to (A) 1 at any 0 input causes the output to be at logic 1
(A) A + B + C (B) 1 at any input causes the output to be at logic 0
(B) ABC (C) 0 at any input causes the output to be at logic 0
(C) 1 + ABC (D) 0 at any input causes the output to be at logic 1
(D) 1
For questions 64 to 67 refer to the following figures
56. 10 in BCD code is represented as
(A) 10100 A
(B) 11000 y A y
(C) 01011
(D) None of the above B B
(A) (B)
57. A Nand gate is called a universal logic element because
(A) It is used by everybody
(B) any logic functions can be realised by Nand gates A y y
only.
(C) many digital computers used Nand gates.
(D) all the minimization techniques are applicable for B
optimum NAND gate realization.
(C) (D)
58. Which of the following pairs of octal and binary
numbers are not equal?
(A) (11111011) = (769) 8
2
(B) (11010) = (33)
2 2
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