Explore topic-wise MCQs in Digital Logic Design.

This section includes 66 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Logic Design knowledge and support exam preparation. Choose a topic below to get started.

51.

Consider the values A = 2.0 × 1030, B = -2.0 × 1030 C = 1.0. Assume, that the floating point numbers are represented with 32 bits. What are the values of X and Y, when the following sequence of operations are executed on a computer?X = A + BY = A + CX = X + CY = Y + B

A. X = 1.0, Y = 1.0
B. X = 1.0, Y = 0.0
C. X = 0.0, Y = 1.0
D. X = 0.0, Y = 0.0
Answer» C. X = 0.0, Y = 1.0
Discussion
52.

a 4 bit digital word (D) is used to represent an analog signal that varies from 0 V to 15 V. The digital word D corresponding to 7 V will be:

A. 0001
B. 0010
C. 0111
D. 0110
Answer» D. 0110
Discussion
53.

Determine the minimised expression of Boolean functionF = X̅ Z̅ + Y̅ Z̅ + Y Z̅ + XYZ

A. X̅ Y̅ + Z
B. Z̅ + XY
C. X̅ Y + Z
D. XYZ
Answer» C. X̅ Y + Z
Discussion
54.

Canonical SOP form of logic expression consists of only _______.

A. Maxterms
B. Min terms
C. Cell
D. Laterals
Answer» C. Cell
Discussion
55.

Excess - 3 - code is also known as

A. Weighted code
B. Cyclic redundancy code
C. Self-complementing code
D. Algebraic code
Answer» D. Algebraic code
Discussion
56.

lf a variable can take only integral values from 0 to n, where n is an integer, then the variable can be represented as a bit-field whose width is ( the log in the answers are to the base 2, and [log n] means the floor of log n)

A. [log(n)] + 1 bits
B. [log (n-1)]+1 bits
C. [log (n+1)] + 1 bits
D. None of the above
Answer» E.
Discussion
57.

Convert the decimal number, 187 to 8-bit binary.

A. 101110112
B. 110111012
C. 101111012
D. 101111002
Answer» B. 110111012
Discussion
58.

A NAND gate is equivalent to a/an ______ gate.

A. inverted-input OR
B. inverted-input AND
C. XOR
D. XNOR
Answer» B. inverted-input AND
Discussion
59.

Given the following binary number in 32-bit (single precision) IEEE-754 format:00111110011011010000000000000000The decimal value closest to this floating-point number is

A. 1.45 × 101
B. 1.45 × 10-1
C. 2.27 × 10-1
D. 2.27 × 101
Answer» D. 2.27 × 101
Discussion
60.

Consider the 4-to-1 multiplexer with two select lines S1 and S0 given below.The minimal sum-of-products from of the Boolean expression for the output F of the multiplexer is

A. P̅ Q + Q R̅ + P Q̅ R
B. P̅ Q + P̅ Q R̅ + P Q R̅ + P Q̅ R
C. P̅ Q R + P̅ Q R̅ + Q R̅ + P Q̅ R
D. P Q R̅
Answer» B. P̅ Q + P̅ Q R̅ + P Q R̅ + P Q̅ R
Discussion
61.

Excess-3 code of decimal number 2 is:

A. 1010
B. 0011
C. 1100
D. 0101
Answer» E.
Discussion
62.

In single-precision, double-precision and extended-precision representation of floatingpoint numbers, as defined by ANSI/IEEE standard 754-1985, the no.of bits used are____ respectively.

A. 32,64 and 80
B. 32,64 and 128
C. 16,32 and 64
D. 16,32 and 80
Answer» B. 32,64 and 128
Discussion
63.

It is awkward to employ a signed-magnitude system in computer arithmetic, because1) Sign and magnitude have to be handled separately2) It has two representations for ‘0’Which of the above statements is/are correct?

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2
Answer» B. 2 only
Discussion
64.

A ’literal’ in Boolean Algebra means

A. A variable in its uncomplemented form only
B. A variable or with its complement
C. A variable in its complemented form only
D. A variable in its complemented or uncomplemented form
Answer» E.
Discussion
65.

Let M = 11111010 and N = 00001010 be two 8 bit two’s compliment number. Their product in two’s complement is

A. 11000100
B. 10011100
C. 10100101
D. 11010101
Answer» B. 10011100
Discussion
66.

(1217)8 is equivalent to

A. (1217)16
B. (028F)16
C. (2297)10
D. (0B17)16
Answer» C. (2297)10
Discussion