Electronics MCQ Questions and Answers

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Q21
A NAND gate is called a universal logic element because
  • A it is used by everybody
  • B any logic function can be realized by NAND gates alone
  • C all the minization techniques are applicable for optimum NAND gate realization
  • D many digital computers use NAND gates.
Answer: Option B
Q22
Digital computers are more widely used as compared to analog computers, because they are
  • A less expensive
  • B always more accurate and faster
  • C useful over wider ranges of problem types
  • D easier to maintain.
Answer: Option C
Q23
Most of the digital computers do not have floating point hardware because
  • A floating point hardware is costly
  • B it is slower than software
  • C it is not possible to perform floating point addition by hardware
  • D of no specific reason.
Answer: Option A
Q24
The number 1000 would appear just immediately after
  • A FFFF (hex)
  • B 1111 (binary)
  • C 7777 (octal)
  • D All of the above.
Answer: Option D
Q25
(1(10101)2 is
  • A (37)10
  • B ( 69)10
  • C (41 )10
  • D — (5)10
Answer: Option A
Q26
The number of Boolean functions that can be generated by n variables is equal to
  • A 2n
  • B 22 n
  • C 2n-1
  • D — 2n
Answer: Option B
Q27
Consider the representation of six-bit numbers by two’s complement, one’s complement, or by sign and magnitude: In which representation is there overflow from the addition of the integers 011000 and 011000?
  • A Two’s complement only
  • B Sign and magnitude and one’s complement only
  • C Two’s complement and one’s complement only
  • D All three representations.
Answer: Option D
Q28
A hexadecimal odometer displays F 52 F. The next reading will be
  • A F52E
  • B G52F
  • C F53F
  • D F53O.
Answer: Option D
Q29
Positive logic in a logic circuit is one in which
  • A logic 0 and 1 are represented by 0 and positive voltage respectively
  • B logic 0 and, -1 are represented by negative and positive voltages respectively
  • C logic 0 voltage level is higher than logic 1 voltage level
  • D logic 0 voltage level is lower than logic 1 voltage level.
Answer: Option D
Q30
Which of the following gate is a two-level logic gate
  • A OR gate
  • B NAND gate
  • C EXCLUSIVE OR gate
  • D NOT gate.
Answer: Option C

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