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MCQs

Total Questions : 25 | Page 1 of 3 pages
Question 1.  Which of the following is correct for a gated D-type flip-flop?
  1.    The Q output is either SET or RESET as soon as the D input goes HIGH or LOW.
  2.    The output complement follows the input when enabled.
  3.    Only one of the inputs can be HIGH at a time.
  4.    The output toggles if one of the inputs is held HIGH.
 Discuss Question
Answer: Option A. -> The Q output is either SET or RESET as soon as the D input goes HIGH or LOW.
Question 2.  When both inputs of a J-K flip-flop cycle, the output will:
  1.    be invalid
  2.    not change
  3.    change
  4.    toggle
 Discuss Question
Answer: Option B. -> not change
Question 3.  
Latches constructed with NOR and NAND gates tend to remain in the latched condition due to which configuration feature?
  1.    asynchronous operation
  2.    low input voltages
  3.    gate impedance
  4.    cross coupling
 Discuss Question
Answer: Option D. -> cross coupling
Question 4.  The 555 timer can be used in which of the following configurations?
  1.    astable, monostable
  2.    monostable, bistable
  3.    astable, toggled
  4.    bistable, tristable
 Discuss Question
Answer: Option A. -> astable, monostable
Question 5.  A basic S-R flip-flop can be constructed by cross-coupling which basic logic gates?
  1.    AND or OR gates
  2.    XOR or XNOR gates
  3.    NOR or NAND gates
  4.    AND or NOR gates
 Discuss Question
Answer: Option C. -> NOR or NAND gates
Question 6.  One example of the use of an S-R flip-flop is as a(n):
  1.    transition pulse generator
  2.    astable oscillator
  3.    racer
  4.    switch debouncer
 Discuss Question
Answer: Option D. -> switch debouncer
Question 7.  If both inputs of an S-R NAND latch are LOW, what will happen to the output?
  1.    The output would become unpredictable.
  2.    The output will toggle.
  3.    The output will reset.
  4.    No change will occur in the output.
 Discuss Question
Answer: Option A. -> The output would become unpredictable.
Question 8.  An astable multivibrator is a circuit that:
  1.    has two stable states
  2.    is free-running
  3.    produces a continuous output signal
  4.    is free-running and produces a continuous output signal
 Discuss Question
Answer: Option C. -> produces a continuous output signal
Question 9. . The truth table for an S-R flip-flop has how many VALID entries?
  1.    3
  2.    1
  3.    4
  4.    2
 Discuss Question
Answer: Option A. -> 3
Question 10.  What is another name for a one-shot?
  1.    monostable
  2.    bistable
  3.    astable
  4.    tristable
 Discuss Question
Answer: Option A. -> monostable

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