Q#1: A SOP expression is equal to 1
(A) All the variables in domain of expression are present
(B) At least one variable in domain of expression is present
(C) When one or more product terms in the expression are equal to 0
(D) When one or more product terms in the expression are equal to 1
Answer: (D) When one or more product terms in the expression are equal to 1
Q#2: The output A < B is set to 1 when the input combination is
(A) A=10, B=01
(B) A=11, B=01
(C) A=01, B=01
(D) A=01, B=10
Answer: (D) A=01, B=10
Q#3: Two 2-bit comparator circuits can be connected to form single 4-bit comparator
(A) True
(B) False
Answer: (A) True
Q#4: High level Noise Margins (VNH) of CMOS 5 volt series circuits is
(A) 0.3 V
(B) 0.5 V
(C) 0.9 V
(D) 3.3 V
Answer: (C) 0.9 V
Q#5: Mantissa of result for multiplying 723 × 34 in floating point notation
(A) 24.582
(B) 2.4582
(C) 24582
(D) 0.24582
Answer: (B) 2.4582
Q#6: Output of F=A+B+C when A=0, B=1, C=1 (+ represents OR)
(A) Undefined
(B) One
(C) Zero
(D) 10 (binary)
Answer: (B) One
Q#7: If an active-HIGH S-R latch has a 0 on S and 1 on R, then R goes to 0, the latch will be
(A) SET
(B) RESET
(C) Clear
(D) Invalid
Answer: (A) SET
Q#8: 3.3 V CMOS series compared to 5 V CMOS series
(A) Low switching speeds, high power dissipation
(B) Fast switching speeds, high power dissipation
(C) Fast switching speeds, very low power dissipation
(D) Low switching speeds, very low power dissipation
Answer: (C) Fast switching speeds, very low power dissipation
Q#9: The binary value “1010110” is equivalent to decimal
(A) 86
(B) 87
(C) 88
(D) 89
Answer: (A) 86
Q#10: Encoder used as a keypad encoder
(A) 2-to-8 encoder
(B) 4-to-16 encoder
(C) BCD-to-Decimal
(D) Decimal-to-BCD Priority
Answer: (D) Decimal-to-BCD Priority
Q#11: How many data select lines are required for selecting eight inputs?
(A) 1
(B) 2
(C) 3
(D) 4
Answer: (C) 3
Q#12: The OR, NOT, AND gate diagram shows implementation of
(A) Boolean
(B) Arbitrary
(C) POS
(D) SOP
Answer: (D) SOP
Q#13: Quad Multiplexer has outputs
(A) 4
(B) 8
(C) 12
(D) 16
Answer: (A) 4
Q#14: Demultiplexer has
(A) Single input and single outputs
(B) Multiple inputs and multiple outputs
(C) Single input and multiple outputs
(D) Multiple inputs and single output
Answer: (C) Single input and multiple outputs
Q#15: The expression is an example of Commutative Law for Multiplication
(A) AB + C = A + BC
(B) A(B + C) = B(A + C)
(C) AB = BA
(D) A + B = B + A
Answer: (C) AB = BA
Q#16: “Sum-of-Weights” method is used
(A) To convert from one number system to other
(B) To encode data
(C) To decode data
(D) To convert from serial to parallel data
Answer: (A) To convert from one number system to other
Q#17: Maximum number in unsigned octal system
(A) 1
(B) 7
(C) 9
(D) 16
Answer: (B) 7
Q#18: Exponent of result for adding 723 + 134 in floating point notation
(A) 0
(B) 1
(C) 2
(D) 3
Answer: (C) 2
Q#19: 3-variable Karnaugh Map (K-Map) has how many cells
(A) 4
(B) 8
(C) 12
(D) 16
Answer: (B) 8
Q#20: Comparator outputs for A=1100, B=1001
(A) A > B = 1, A < B = 0, A < B = 1
(B) A > B = 0, A < B = 1, A = B = 0
(C) A > B = 1, A < B = 0, A = B = 0
(D) A > B = 0, A < B = 1, A = B = 1
Answer: (C) A > B = 1, A < B = 0, A = B = 0