Top 550+ Solved Digital Principles and System Design MCQ Questions Answer
Q. The boolean function A + BC is a reduced form of
a. ab + bc
b. (a + b)(a + c)
c. a’b + ab’c
d. (a + c)b
Q. In which of the following gates the output is 1 if and only if at least one input is 1?
a. and
b. nor
c. nand
d. or
Q. The time required for a gate or inverter to change its state is called
a. rise time
b. decay time
c. propagation time
d. charging time
Q. What is the minimum number of two input NAND gates used to perform the function of two input OR gates?
a. one
b. two
c. three
d. four
Q. The number of full and half adders are required to add 16-bit number is
a. 8 half adders, 8 full adders
b. 1 half adders, 15 full adders
c. 16 half adders, 0 full adders
d. 4 half adders, 12 full adders
Q. Which of the following will give the sum of full adders as output?
a. three point major circuit
b. three bit parity checker
c. three bit comparator
d. three bit counter
Q. An OR gate can be imagined as
a. switches connected in series
b. switches connected in parallel
c. mos transistor connected in series
d. bjt transistor connected in series
Q. How many full adders are required to construct an m-bit parallel adder?
a. m/2
b. m
c. m-1
d. m+1
Q. Boolean Function is of the form of
a. truth values
b. k=f(x,y,x)
c. algebraic expression
d. truth table
Q. In the boolean function w=f(X,Y,Z), what is the RHS referred to as
a. right hand side
b. expression
c. literals
d. boolean
Q. The general form for calculating the number of rows in a truth table is
a. 2n
b. 2n+1
c. 2n
d. 2n+1