This set of Computer Fundamentals Multiple Choice Questions & Answers (MCQs) focuses on “Sign Magnitude”.
1. __________________ is a straightforward method of representing positive and negative numbers.
a) Radix
b) Complement
c) Sign Magnitude
d) Encode
View Answer
Explanation: Sign Magnitude is used for the representation of positive and negative numbers. If the leftmost digit is 0, the number is positive. If the leftmost digit is 1, the number is negative.
2. The additive inverse of a number is the number which when added to the original number gives 1 as a result.
a) True
b) False
View Answer
Explanation: Additive Inverse of a number is the number which gives 0 and not 1 when added to the original number. e.g. number=45, additive inverse =-45, after addition they give 0.
3. The 1’s complement of 1 in 4 bits is __________
a) 0001
b) 0
c) 1001
d) 1110
View Answer
Explanation: 1’s complement is obtained by reversing the bits from 0 to 1 and vice-versa. Binary of 1 is : 0001 and 1’s complement is : 1110.
4. The binary number 111 in its 2’s complement form is ____________
a) 010
b) 001
c) 000
d) 111
View Answer
Explanation: 2’s complement is obtained by adding 1 to the 1’s complement. 1’s complement of 111: 000 and 2’s complement:001.
5. The sign magnitude representation of -9 is ___________
a) 00001001
b) 11111001
c) 10001001
d) 11001
View Answer
Explanation: In case of a negative number, the leftmost digit is 1 if the number is negative. Therefore, +9=00001001 and -9=10001001. Similarly for all other negative numbers.
6. If you are given a word of size n bits, the range of 2’s complement of binary numbers is ________
a) -2n+1 to +2n+1
b) -2n-1 to +2n-1
c) -2n-1 to +2n+1
d) -2n-1 to +2n-1-1
View Answer
Explanation: 2’s complement is obtained by adding 1 to the 1’s complement. For e.g. 5 :0101 and 1’s complement=1010 and 2’s complement=1011.
7. In both signed magnitude and 2’s complement , positive and negative numbers are separated using ______________
a) LSB
b) MSB
c) 0
d) 1
View Answer
Explanation: The positive and negative numbers are separated using the MSB. MSB is the Most Significant Bit. MSB is the leftmost bit. e.g. If 1000 is the number then 1 is the most significant bit.
8. Single Precision format comprises of _________ bits.
a) 4
b) 8
c) 16
d) 32
View Answer
Explanation: The single precision format comprises of 32-bits. It has 1 sign bit, 8 bits for exponent and 23 for the mantissa.
9. If m is the 2’s complement and n is the binary number, then ______________
a) m=n’
b) m=n’+1
c) m=n’-1
d) m=n
View Answer
Explanation: 2’s complement is simply obtained by addition of 1. So if n is the number and we take the 2’s complement, add 1 to it, we get the 2’s complement. Therefore, m=n’+1.
10. The possible number of bit patterns with 8 bits ________________
a) 128
b) 8
c) 24
d) 256
View Answer
Explanation: The total number of patterns that can be formed using n-bits are 2n. Here, possible patterns are: 28=256.
Sanfoundry Global Education & Learning Series – Computer Fundamentals.
To practice all areas of Computer Fundamentals, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
- Practice Information Technology MCQs
- Practice BCA MCQs
- Apply for BCA Internship
- Practice Computer Science MCQs
- Check BCA Books
