Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Chapter: 3
Q121:
What is the hidden bit in the floating-point format?
A. The leading bit of the mantissa
B. The exponent
C. The sign bit
D. The leading 1 that is not written
Correct Answer:
D
Chapter: 3
Q122:
What is the result when you add two floating-point numbers with different exponents?
A. The result is always zero
B. The mantissas are added directly
C. The decimal point of one number is adjusted to match the exponent of the other
D. The exponents are subtracted
Correct Answer:
C
Chapter: 3
Q123:
In the 64-bit Double-Precision Floating Point format, how many bits are used for the exponent?
A. 11
B. 8
C. 52
D. 23
Correct Answer:
A
Chapter: 3
Q124:
How are very large or very small numbers typically represented in digital systems?
A. By using more bits
B. By using scientific notation
C. By using hexadecimal representation
D. By using binary numbers
Correct Answer:
B
Chapter: 3
Q125:
Which base is used in the Hexadecimal number system?
A. 2
B. 8
C. 10
D. 16
Correct Answer:
D
Chapter: 3
Q126:
What is the hexadecimal equivalent of the binary number 1101 0110?
A. B6
B. D6
C. A6
D. F6
Correct Answer:
B
Chapter: 3
Q127:
How do you represent the number 16 in hexadecimal?
A. F
B. 10
C. 1F
D. 11
Correct Answer:
B
Chapter: 3
Q128:
Which method is used to convert a decimal number directly into hexadecimal?
A. Indirect method
B. Repeated Division-by-16 Method
C. Sum-of-Weights method
D. Division-by-2 Method
Correct Answer:
B
Chapter: 3
Q129:
What is the hexadecimal equivalent of the decimal number 2096?
A. 8A0
B. 830
C. 1A0
D. 430
Correct Answer:
B
Chapter: 3
Q130:
Which method converts hexadecimal to decimal directly by summing the weights?
A. Indirect method
B. Repeated Division Method
C. Sum-of-Weights Method
D. Binary Conversion Method
Correct Answer:
C
Chapter: 3
Q131:
What is the result of adding hexadecimal numbers 2AC6 and 92B5?
A. BD7B
B. AB6A
C. CA12
D. 1234
Correct Answer:
A
Chapter: 3
Q132:
How can the number zero be represented in a 15-digit decimal floating-point format?
A. All mantissa digits set to 9
B. All mantissa digits set to 0
C. All exponent digits set to 0
D. All exponent digits set to 9
Correct Answer:
B
Chapter: 3
Q133:
What is the smallest exponent value that can be represented using a biased exponent scheme with a bias of 50?
A. -49
B. -48
C. -50
D. -51
Correct Answer:
C
Chapter: 3
Q134:
In a 64-bit Double-Precision Floating Point format, which bit is used to represent the sign?
A. The first bit
B. The last bit
C. The middle bit
D. The exponent bit
Correct Answer:
A
Chapter: 3
Q135:
What is the range of exponent values in a 32-bit Single Precision Floating Point format?
A. +127 to -127
B. +128 to -127
C. +128 to -126
D. +127 to -126
Correct Answer:
D
Chapter: 3
Q136:
Which of the following can represent infinity in the biased exponent scheme?
A. The maximum exponent value
B. The minimum exponent value
C. The exponent value 0
D. The exponent value 99
Correct Answer:
D
Chapter: 3
Q137:
Which hexadecimal value corresponds to the binary number 1101?
A. D
B. B
C. A
D. F
Correct Answer:
A
Chapter: 3
Q138:
What is the binary equivalent of the hexadecimal number FD13?
A. 1111 1101 0001 0011
B. 1101 1011 0001 0011
C. 1011 1110 0011 0101
D. 1111 1110 0000 1111
Correct Answer:
A
Chapter: 3
Q139:
In hexadecimal subtraction, what is the result of subtracting 2AC6 from 92B5?
A. 679F
B. 67EF
C. 67BF
D. 671F
Correct Answer:
B
Chapter: 3
Q140:
What does the subscript '16' in the number 10H indicate?
A. It’s a decimal number
B. It’s a hexadecimal number
C. It’s a binary number
D. It’s an octal number
Correct Answer:
B