Digital Logic and Design MCQs with Answers

Practice important Digital Logic and Design MCQs with answers and explanations.

Multiple Choice Questions

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Q21: (A+B).(A+C) = ___________
  • A: B+C
  • B: A+BC
  • C: AB+C
  • D: AC+B
View Answer
B

Q22: A.(B + C) = A.B + A.C is the expression of _________________
  • A: Demorgan’s Law
  • B: Commutative Law
  • C: Distributive Law
  • D: Associative Law
View Answer
C

Q23: In ANSI/IEEE Standard 754 “Mantissa” is represented by 32-bits___ bits
  • A: 8-bits
  • B: 16-bits
  • C: 32-bits
  • D: 64-bits
View Answer
C

Q24: Caveman number system is Base 5____ number system
  • A: 2
  • B: 5
  • C: 10
  • D: 16
View Answer
B

Q25: 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.
View Answer
B

Q26: 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
View Answer
C

Q27: If we multiply “723” and “34” by representing them in floating point notation i.e. by first, converting them in floating point representation and then multiplying them, the value of mantissa of result will be ________
  • A: 24.582
  • B: 2.4582
  • C: 24582
  • D: 0.24582
View Answer
B

Q28: If an active-HIGH S-R latch has a 0 on the S input and a 1 on the R input and then the R input goes to 0, the latch will be ________.
  • A: SET
  • B: RESET
  • C: Clear
  • D: Invalid
View Answer
A

Q29: 3.3 v CMOS series is characterized by __________ and _________ as compared to the 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
View Answer
C

Q30: The _______ Encoder is used as a keypad encoder.
  • A: 2-to-8 encoder
  • B: 4-to-16 encoder
  • C: BCD-to-Decimal
  • D: Decimal-to-BCD Priority
View Answer
B

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