Top 350+ Solved Digital Electronics MCQ Questions Answer
Q. If minuend = 0, subtrahend = 1 and borrow input = 1 in a full subtractor then the borrow output will be
a. 0
b. 1
c. floating
d. high impedance
Q. The decimal number system represents the decimal number in the form of
a. hexadecimal
b. binary coded
c. octal
d. decimal
Q. The output sum of two decimal digits can be represented in
a. gray code
b. excess-3
c. bcd
d. hexadecimal
Q. The addition of two decimal digits in BCD can be done through
a. bcd adder
b. full adder
c. ripple carry adder
d. carry look ahead
Q. 3 bits full adder contains
a. 3 combinational inputs
b. 4 combinational inputs
c. 6 combinational inputs
d. 8 combinational inputs
Q. The simplified expression of full adder carry is
a. c = xy+xz+yz
b. c = xy+xz
c. c = xy+yz
d. c = x+y+z
Q. Decimal digit in BCD can be represented by
a. 1 input line
b. 2 input lines
c. 3 input lines
d. 4 input lines
Q. The number of logic gates and the way of their interconnections can be classified as
a. logical network
b. system network
c. circuit network
d. gate network
Q. What is a multiplexer?
a. it is a type of decoder which decodes several inputs and gives one output
b. a multiplexer is a device which converts many signals into one
c. it takes one input and results into many output
d. it is a type of encoder which decodes several inputs and gives one output
Q. Which combinational circuit is renowned for selecting a single input from multiple inputs & directing the binary information to output line?
a. data selector
b. data distributor
c. both data selector and data distributor
d. demultiplexer
Q. It is possible for an enable or strobe input to undergo an expansion of two or more MUX ICs to the digital multiplexer with the proficiency of large number of
a. inputs
b. outputs
c. selection lines
d. enable lines
Q. Which is the major functioning responsibility of the multiplexing combinational circuit?
a. decoding the binary information
b. generation of all minterms in an output function with or-gate
c. generation of selected path between multiple sources and a single destination
d. encoding of binary information