Top 550+ Solved Digital Principles and System Design MCQ Questions Answer
Q. The logic circuits whose outputs at any instant of time depends only on the present input but also on the past outputs are called
a. combinational circuits
b. sequential circuits
c. latches
d. flip-flops
Q. Whose operations are more faster among the following?
a. combinational circuits
b. sequential circuits
c. latches
d. flip-flops
Q. In S-R flip-flop, if Q = 0 the output is said to be
a. set
b. reset
c. previous state
d. current state
Q. The output of latches will remain in set/reset untill
a. the trigger pulse is given to change the state
b. any pulse given to go into previous state
c. they don’t get any pulse more
d. the pulse is edge-triggered
Q. What is a trigger pulse?
a. a pulse that starts a cycle of operation
b. a pulse that reverses the cycle of operation
c. a pulse that prevents a cycle of operation
d. a pulse that enhances a cycle of operation
Q. The circuits of NOR based S-R latch classified as asynchronous sequential circuits, why?
a. because of inverted outputs
b. because of triggering functionality
c. because of cross-coupled connection
d. because of inverted outputs & triggering functionality
Q. A latch is an example of a
a. monostable multivibrator
b. astable multivibrator
c. bistable multivibrator
d. 555 timer
Q. Latch is a device with
a. one stable state
b. two stable state
c. three stable state
d. infinite stable states
Q. Why latches are called a memory devices?
a. it has capability to stare 8 bits of data
b. it has internal memory of 4 bit
c. it can store one bit of data
d. it can store infinite amount of data
Q. Two stable states of latches are
a. astable & monostable
b. low input & high output
c. high output & low output
d. low output & high input