Top 350+ Solved Digital Electronics and Logic Design MCQ Questions Answer
Q. In order to implement a n variable switching function, a MUX must have
a. 2n inputs
b. 2n+1 inputs
c. 2n-1 inputs
d. 2n-1inputs
Q. A latch is constructed using two cross-coupled
a. and and or gates
b. and gates
c. nand and nor gates
d. nandgates
Q. A combinational logic circuit which sends data coming from a single source to two or more separate destinations is
a. decoder
b. encoder
c. multiplexer
d. demultiple xer
Q. Data can be changed from special code to temporal code by using
a. shift registers
b. counters
c. combination al circuits
d. a/d converters
Q. Which one of the following will give the sum of full adders as output ?
a. three point majority circuit
b. three bit parity checker
c. three bit comparator
d. three bit counter
Q. The number of full and half-adders required to add 16-bit numbers is
a. 8 half-adders,8 full-adders
b. 1 half-adder,15 full- adders
c. 16 half-adders, 0 full- adders
d. 4 half-adders, 12 full-adders
Q. A one-to-four line demultiplexer is to be implemented using a memory. How many bits must each word have ?
a. 1 bit
b. 2 bits
c. 4 bits
d. 8 bits
Q. What logic function is produced by adding an inverter to the output of an AND gate ?
a. nand
b. nor
c. xor
d. or
Q. A demultiplexer is used to
a. route the data from single input to one of many outputs
b. select data from several inputs and route it to single output
c. perform serial to parallel conversion
d. all of these
Q. How many full adders are required to construct an m-bit parallel adder ?
a. m/2
b. m-1
c. m
d. m+1
Q. Parallel adders are
a. combinational logic circuits
b. sequential logic circuits
c. both (a) and (b)
d. none of these
Q. The digital multiplexer is basically a combination logic circuit to perform the operation
a. and-and
b. or-or
c. and-or
d. or-and