Top 350+ Solved Digital Electronics and Logic Design MCQ Questions Answer
Q. A data selector is also called a demultiplexer.
a. true
b. false
c. none of the above
d. can not predict
Q. A digital circuit that converts coded information into a familiar or non- coded form is known as an encoder.
a. true
b. false
c. none of the above
d. can not predict
Q. An exclusive-OR gate will invert a signal on one input if the other is always HIGH.
a. true
b. false
c. none of the above
d. can not predict
Q. The following combination is correct for an EVEN parity data transmission system: data = 100111100 and parity = 0
a. true
b. false
c. none of the above
d. can not predict
Q. The CASE control structure is used when an expression has a list of possible values.
a. true
b. false
c. none of the above
d. can not predict
Q. An encoder in which the highest and lowest value input digits are encoded simultaneously is known as a priority encoder.
a. true
b. false
c. none of the above
d. can not predict
Q. Three select lines are required to address four data input lines.
a. true
b. false
c. none of the above
d. can not predict
Q. Single looping in groups of three is a common K-map simplification technique.
a. true
b. false
c. none of the above
d. can not predict
Q. In true sum-of-products expressions, the inversion signs cannot cover more than single variables in a term.
a. true
b. false
c. none of the above
d. can not predict
Q. A combinatorial logic circuit has memory characteristics that "remember" the inputs after they have been removed.
a. true
b. false
c. none of the above
d. can not predict
Q. Which of the following is not a form of multivibrator?
a. astable.
b. monostable.
c. tristable.
d. bistable.
Q. A J-K flip-flop has two control inputs. What happens to the Q output on the active edge of the clock if both control inputs are asserted simultaneously?
a. the q output toggles to the other state.
b. the q output is set to 1.
c. the q output is reset to 0.
d. the q output remains unchange
Q. The code where all successive numbers differ from their preceding number by single bit is
a. binary code.
b. bcd.
c. excess – 3.
d. gray.
Q. DeMorgan’s first theorem shows the equivalence of
a. or gate and exclusive or gate.
b. nor gate and bubbled and gate.
c. nor gate and nand gate.
d. nandgate and not gate