Top 350+ Solved Digital Electronics and Logic Design MCQ Questions Answer
Q. Flip flops are also called
a. bi-stable dualvibrators
b. bi-stable transformer
c. bi-stable multivibrator s
d. bi-stable singlevibra tors
Q. A transparent mode means
a. the changes in the data at the inputs of the latch are seen at the output
b. the changes in the data at the inputs of the latch are not seen at the output
c. propagation delay is zero (output is immediately changed when clock signal is applied)
d. input hold time is zero (no need to maintain input after clocktransition)
Q. Given the state diagram of an up/down counter, we can find
a. the next state of a given present state
b. the previous state of a given present state
c. both the next and previous states of a given state
d. the state diagram shows only the inputs/out puts of a given states
Q. In Q output of the last flip-flop of the shift register is connected to the data input of the firstflip-flop of the shift register.
a. moore machine
b. meally machine
c. johnson counter
d. ring counter
Q. We have a digital circuit. Different parts of circuit operate at different clock frequencies (4MHZ, 2MHZand 1MHZ), but we have a single clock source having a fix clock frequency (4MHZ), we can get help by
a. using s-r flop- flop
b. d-flipflop
c. j-k flip-flop
d. t-flip-flop
Q. If an S-R latch has a 1 on the S input and a 0 on the R input and then the S input goes to 0, the latch willbe
a. set
b. reset
c. invalid
d. clear
Q. A frequency counter
a. counts pulse width
b. counts no. of clock pulses in 1 second
c. counts high and low range of given clock pulse
d. none of given options
Q. Simplify the following expression into sum of products using Karnaugh map F(A,B,C,D) = (1,3,4,5,6,7,9,12,13)
a. a\b+c\ d+ a\d+bc\
b. a\b\+c\ d\+a\d\+b\c\
c. a\b\+c\ d+ a\d+bc\
d. a\b+c\ d\+a\d\+bc\