Page 349 - GMAT 2017b_Neatb

Computer Literacy Test 1

64. XNOR gate is represented by 73. If one want to design a binary computer, preferred
(A) Figure A only type of flip-flop is
(B) Figure B and C only (A) D-type
(C) Figure C and D only (B) SR-type
(D) None of the four figures (C) Latch
(D) JK-type
65. XOR is represented by
(A) Figure (A) 74. Some digital computers are called decimal computers
(B) Figure (B) because
(C) Figure (C) (A) Decimal numbers can be read in such computer.
(D) None of the above (B) Each memory element in such computers has 10
distinct stable states.
66. Which figure corresponds to NOR GATE? (C) Each decimal digit is separately encoded in
(A) Figure (A) binary.
(B) Figure (B) (D) None of the above.
(C) Figure (C)
(D) Figure (D) 75. For the logic diagram shown in the figure the output
will be
67. Boolean expression for Figure (B) is
(A) A + B = y x
y
(B) A . B = y z
(C) A. B = y Output
(D) A + B = y

68. According to the Boolean algebra which of the x
following is not valid? y
(A) x = 1 z
(B) x + y = y + x (A) XYZ + XYZ
(C) x.y = y.x (B) XYZ + ZYZ
(D) x + (y + z) = (x + y) + z (C) XYZ + 1
(D) XY + YZ + ZX
69. Which of the following relation is not valid according to
Boolean Algebra? 76. The complement of
(A) 0 + x = x (A + B) (B + C) (B + C) will be :
(B) 1 + x = 1 (A) A B C
(C) x + x = x (B) A(B + C)
(D) x + x = 0 (C) AB + BB + AC
(D) None of the above
70. According to the Boolean algebra which of the
following relation is not valid? 77. The following expression when simplified
(A) X(X + Y) = X XY + ZYZ + XYZ + XYZ will became
(B) (X + Y)(Y + Z) = X + YZ (A) X
(C) X = XY = X + Y (B) Y
(D) XY + YZ + YZ - XYZ (C) Z
(D) X + Y + Z
71. The sum of (111010) and (11011) in decimal form
2 2
will be 78. The expression
(A) 65 ABC (ABC) + ABC + ABC + A + BC)
(B) 75 when simplified gives
(C) 85 (A) 0
(D) 95 (B) 1
(C) A
72. A semiconductor Read-only memory basically: (D) ABC
(A) a combinational logic circuit.
79. The complement of (A + BC + AB) will be
(B) a set of flip-flop memory element.
(C) A sequential circuit with flip-flops and gates (A) A(B + C) (A + B)
(D) None of the above (B) A B C

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