Digital Electronics and Logic Design MCQs with answers Page - 44

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Q. is one of the examples of asynchronous inputs.

  • (A) j-k input
  • (B) s-r input
  • (C) d input
  • (D) clear input (clr)

A

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Q. Bi-stable devices remain in either of their states unless the inputs force the device to switch its state

  • (A) ten
  • (B) eight
  • (C) three
  • (D) two

A

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Q. RCO Stands for

  • (A) reconfiguratio n counter output
  • (B) reconfigurati on clock output
  • (C) ripple counter output
  • (D) ripple clock output

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Q. The low to high or high to low transition of the clock is considered to be a(n)

  • (A) state
  • (B) edge
  • (C) trigger
  • (D) one-shot

A

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Q. In asynchronous digital systems all the circuits change their state with respect to a common clock

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

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Q. If the S and R inputs of the gated S-R latch are connected together using a gate then there is only a single input to the latch. The input is represented by D instead of S or R (A gated D-Latch)

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

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Q. If S=1 and R=0, then Q(t+1) = for positive edge triggered flip-flop

  • (A) 0
  • (B) 1
  • (C) invalid
  • (D) input is invalid

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Q. 3-to-8 decoder can be used to implement Standard SOP and POS Boolean expressions

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

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Q. 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

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Q. The simplest and most commonly used Decoders are the Decoders

  • (A) n to 2n
  • (B) (n-1) to 2n
  • (C) (n-1) to (2n- 1)
  • (D) n to 2n-1

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