Top 550+ Solved Digital Principles and System Design MCQ Questions Answer
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. An identify comparator is defined as a digital comparator which has
a. only one output terminal
b. two output terminals
c. three output terminals
d. no output terminal
Q. A magnitude comparator is defined as a digital comparator which has
a. only one output terminal
b. two output terminals
c. three output terminals
d. no output terminal
Q. The purpose of a Digital Comparator is
a. to convert analog input into digital
b. to create different outputs
c. to add a set of different numbers
d. to compare a set of variables or unknown numbers
Q. TTL 74LS85 is a
a. 1-bit digital comparator
b. 4-bit magnitude comparator
c. 8-bit magnitude comparator
d. 8-bit word comparator
Q. How is an encoder different from a decoder?
a. the output of an encoder is a binary code for 1-of-n input
b. the output of a decoder is a binary code for 1-of-n input
c. the output of an encoder is a binary code for n-of-1 output
d. the output of a decoder is a binary code for n-of-1 output
Q. If we record any music in any recorder, such types of process is called
a. multiplexing
b. encoding
c. decoding
d. demultiplexing