Digital Electronics and Logic Design MCQs with answers Page - 22

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Q. A multiplexed display:

  • (A) accepts data inputs from one line and passes this data to multiple output lines
  • (B) uses one display to present two or more pieces of information
  • (C) accepts data inputs from multiple lines and passes this data to multiple output lines
  • (D) accepts data inputs from several lines and multiplexe s this input data to four bcd lines

A

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Q. In which of the following gates, the output is 1, if and only if at least one input is 1?

  • (A) nor
  • (B) and
  • (C) or
  • (D) nand

A

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

  • (A) rise time iz
  • (B) decay time
  • (C) propagation time
  • (D) charging time

A

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Q. The time required for a pulse to change from 10 to 90 percent of its maximum value is called

  • (A) rise time iz
  • (B) decay time
  • (C) propagation time
  • (D) operating speed

A

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Q. The maximum frequency at which digital data can be applied to gate is called

  • (A) operating speed
  • (B) propagation speed
  • (C) binary level transaction period
  • (D) charging time

A

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Q. What is the minimum number of two-input NAND gates used to perform the function of two input OR gate ?

  • (A) one
  • (B) two
  • (C) three
  • (D) four

A

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Q. The time required for a pulse to decrease from 90 to 10 per cent of its maximum value is called

  • (A) rise time
  • (B) decay time
  • (C) binary level transition period
  • (D) propagatio n delay

A

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Q. Which of the following gates would output 1 when one input is 1 and other input is 0 ?

  • (A) or gate
  • (B) and gate
  • (C) nand gate
  • (D) and gate

A

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Q. Which of the following gates are added to the inputs of the OR gate to convert it to the NAND gate ?

  • (A) not
  • (B) and
  • (C) or
  • (D) xor

A

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Q. The EXCLUSIVE NOR gate is equivalent to which gate followed by an inverter ?

  • (A) or gate
  • (B) and
  • (C) nand
  • (D) xor

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