Top 350+ Solved Digital Electronics MCQ Questions Answer
Q. On addition of +38 and -20 using 2’s complement, we get
a. 11110001
b. 100001110
c. 010010
d. 110101011
Q. On addition of -46 and +28 using 2’s complement, we get
a. 00101110
b. 0101110
c. 00101111
d. 1001111
Q. The decimal number 10 is represented in its BCD form as
a. 10100000
b. 01010111
c. 00010000
d. 00101011
Q. When numbers, letters or words are represented by a special group of symbols, this process is called
a. decoding
b. encoding
c. digitizing
d. inverting
Q. Carry out BCD subtraction for (68) – (61) using 10’s complement method.
a. 00000111
b. 01110000
c. 100000111
d. 011111000
Q. How many bits would be required to encode decimal numbers 0 to 9999 in straight binary codes?
a. 12
b. 14
c. 16
d. 18
Q. The decimal equivalent of the excess-3 number 110010100011.01110101 is
a. 970.42
b. 1253.75
c. 861.75
d. 1132.87
Q. In boolean algebra, the OR operation is performed by which properties?
a. associative properties
b. commutative properties
c. distributive properties
d. all of the mentioned
Q. The expression for Absorption law is given by
a. a + ab = a
b. a + ab = b
c. ab + aa’ = a
d. a + b = b + a
Q. DeMorgan’s theorem states that
a. (ab)’ = a’ + b’
b. (a + b)’ = a’ * b
c. a’ + b’ = a’b’
d. (ab)’ = a’ + b
Q. Complement of the expression A’B + CD’ is
a. (a’ + b)(c’ + d)
b. (a + b’)(c’ + d)
c. (a’ + b)(c’ + d)
d. (a + b’)(c + d’)
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