Digital Electronics MCQs SET-3

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Hey Guys welcome to CSE Study247,Today I am provide you Digital Electronics MCQs SET-3

These MCQs Useful for DRDO CEPTAM, ISRO, COPA, CCC, O level, Bank, MTS, Railway, Data Entry Operator, PWD,PHED, Hindustan Aeronautics Ltd., Air India, NTPC, BHEL, GAIL, PGCIL, MTS, SSC, CGL, CHSL,KVS and all other computer exams.

Q.41 Truth table is used to express:

  • A) Boolean map
  • B) Boolean expression
  • C) Boolean expression
  • D) None

Q.42 The AND operation is equivalent to:

  • A) Intersection
  • B) Union
  • C) Division
  • D) None

Q.43 The time required for a gate or inverter to change its state is called:

  • A) Rise time
  • B) Propagation time
  • C) Changing time
  • D) None

Q.44 The minimum number of transistors can be used by 2 input AND gate is:

  • A) 1
  • B) 2
  • C) 3
  • D) 4

Q.45 Which logic unit is the fastest of all the logic families?

  • A) CMOS
  • B) TTL
  • C) ECL
  • D) None

Q.46 Counter can be used in the measurement of:

  • A) Frequency
  • B) Time
  • C) Distance
  • D) All of these

Q.47 The universal gate is:

  • A) NAND gate
  • B) OR gate
  • C) AND gate
  • D) All of these

Q.48 A byte is consist of?

  • A) 2 bits
  • B) 4 bits
  • C) 8 bits
  • D) 16 bits

Q.49 The Boolean expression A’B+AB’+AB is equivalent to:

  • A) A.B
  • B) A+B
  • C) A’.B
  • D) None

Q.50 EPROM contents can be erased by exposing it to:

  • A) UV rays
  • B) By heat radiations
  • C) Infra red rays
  • D) None

Q.51 The number of output pins of a 8085 microprocessor are:

  • A) 8
  • B) 16
  • C) 40
  • D) 64

Q.52 Which one of the following is 8-bit register in microprocessor?

  • A) 16-bit program counter (PC)
  • B) Accumulator
  • C) 16-bit program counter (PC)
  • D) None

Q.53 CMOS technology used in:

  • A) Microprocessor
  • B) Digital logic
  • C) Both A & B
  • D) None

Q.54 The use of OP-AMP is generally not preferred as?

  • A) Integrator
  • B) Subtractor
  • C) Divider
  • D) None

Q.55 In decimal system, the base or radix is the?

  • B) 1
  • C) 8
  • D) 10

Q.56 A binary system has radix of?

  • B) 1
  • C) 2
  • D) 10

Q.57 Which of the following is an universal gate?

  • A) NOR
  • B) AND
  • C) XOR
  • D) NOT

Q.58 The system on which digital system usually operates is:

  • A) Binary
  • B) Decimal
  • C) Octal
  • D) Hexadecimal

Q.59 In Boolean Algebra the plus sign (+) indicates:

  • A) NOT Operation
  • B) AND Operation
  • C) OR Operation
  • D) None

Q.60 LEDs are usually switched ON and OFF by:

  • A) Diode in the circuit
  • B) Transistor circuit
  • C) Resistors in the circuit
  • D) None

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