Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Chapter: 2
Q101:
In signed binary numbers, what does the MSB (Most Significant Bit) represent?
A. Magnitude
B. Sign
C. Base
D. Exponent
Correct Answer:
B
Chapter: 2
Q102:
How is the binary number 11101 interpreted in a signed binary system?
A. 29
B. -29
C. -13
D. 13
Correct Answer:
C
Chapter: 2
Q103:
What is the 2's complement of the binary number 01101?
A. 10010
B. 10011
C. 11001
D. 1111
Correct Answer:
B
Chapter: 2
Q104:
What does the 2's complement form allow in binary arithmetic?
A. Complex calculations
B. Direct subtraction
C. Direct addition and subtraction
D. Direct multiplication and division
Correct Answer:
C
Chapter: 2
Q105:
In binary arithmetic using 2's complement, what happens when you add +7 and -13?
A. Result is positive
B. Result is zero
C. Result is negative
D. Result is undefined
Correct Answer:
C
Chapter: 2
Q106:
How is binary division performed in digital systems?
A. Left shift
B. Right shift
C. Repeated subtraction
D. Repeated division by 2
Correct Answer:
D
Chapter: 2
Q107:
What is the binary equivalent of the decimal number 392 using repeated division by 2?
A. 110010000
B. 101010101
C. 110001000
D. 101000100
Correct Answer:
C
Chapter: 2
Q108:
How can a negative number be quickly identified in 2’s complement?
A. Checking the LSB
B. Checking the middle bit
C. Checking the MSB
D. Checking the sum of bits
Correct Answer:
C
Chapter: 2
Q109:
What is the binary equivalent of the decimal fraction 0.625 using repeated multiplication by 2?
A. 0.101
B. 0.11
C. 0.011
D. 0.111
Correct Answer:
A
Chapter: 2
Q110:
What is a left shift by 3 bits equivalent to in binary multiplication?
A. Multiplication by 4
B. Multiplication by 8
C. Multiplication by 16
D. Multiplication by 2
Correct Answer:
C
Chapter: 2
Q111:
In binary arithmetic, what is the difference bit when subtracting 1 from 1?
A. "0"
B. 1
C. -1
D. Undefined
Correct Answer:
A
Chapter: 2
Q112:
How are signed and unsigned binary numbers treated in digital systems?
A. Both treated as signed
B. Both treated as unsigned
C. Depends on system settings
D. System decides automatically
Correct Answer:
C
Chapter: 3
Q113:
What happens when the result of an arithmetic operation exceeds the range specified by binary representations?
A. It is stored as zero
B. It is stored as infinity
C. It is considered as an Overflow
D. It is stored as the maximum value
Correct Answer:
C
Chapter: 3
Q114:
What is the range of a 3-bit unsigned binary number?
A. 0 to 7
B. 0 to 8
C. 1 to 7
D. 1 to 8
Correct Answer:
A
Chapter: 3
Q115:
Which of the following numbers in 4-bit 2’s complement form will result in an overflow when added together?
A. 0101 + 0100
B. 1011 + 1100
C. 0101 + 1100
D. 1011 + 0100
Correct Answer:
B
Chapter: 3
Q116:
How can overflow be detected in 2's complement addition?
A. By checking if the carry bit is 1
B. By checking if the result is zero
C. By comparing the sign bits of operands and result
D. By ensuring the exponent is not zero
Correct Answer:
C
Chapter: 3
Q117:
Which IEEE standard defines the 32-bit Single Precision Floating Point format for binary numbers?
A. IEEE 754
B. IEEE 765
C. ANSI 754
D. ANSI 765
Correct Answer:
A
Chapter: 3
Q118:
What is the sign bit (S) used for in the 32-bit Single Precision Floating Point format?
A. To represent the exponent
B. To represent the mantissa
C. To represent the sign of the number
D. To represent the floating point
Correct Answer:
C
Chapter: 3
Q119:
The ANSI/IEEE Standard 754 defines a __________Single-Precision Floating Point format for binary numbers.
A. 8-bit
B. 16-bit
C. 32-bit
D. 64-bit
Correct Answer:
C
Chapter: 3
Q120:
In 32-bit Single Precision Floating Point format, how many bits are allocated for the exponent?
A. 23
B. 8
C. 1
D. 11
Correct Answer:
B