Engineering Questions with Answers - Multiple Choice Questions
Computer Organization MCQ – Numbers and Arithmetic Operations
1 - Question
Which method/s of representation of numbers occupies a large amount of memory than others?
a) Sign-magnitude
b) 1’s complement
c) 2’s complement
d) 1’s & 2’s compliment
View Answer
Answer: a
Explanation: It takes more memory as one bit used up to store the sign.
2 - Question
Which representation is most efficient to perform arithmetic operations on the numbers?
a) Sign-magnitude
b) 1’s complement
c) 2’S complement
d) None of the mentioned
View Answer
Answer: c
Explanation: The two’s complement form is more suitable to perform arithmetic operations as there is no need to involve the sign of the number into consideration.
3 - Question
Which method of representation has two representations for ‘0’?
a) Sign-magnitude
b) 1’s complement
c) 2’s complement
d) None of the mentioned
View Answer
Answer: a
Explanation: One is positive and one for negative.
4 - Question
When we perform subtraction on -7 and 1 the answer in 2’s complement form is _________
a) 1010
b) 1110
c) 0110
d) 1000
View Answer
Answer: d
Explanation: First the 2’s complement is found and that is added to the number and the overflow is ignored.
5 - Question
When we perform subtraction on -7 and -5 the answer in 2’s complement form is ________
a) 11110
b) 1110
c) 1010
d) 0010
View Answer
Answer: b
Explanation: First the 2’s complement is found and that is added to the number and the overflow is ignored.
6 - Question
When we subtract -3 from 2 , the answer in 2’s complement form is _________
a) 0001
b) 1101
c) 0101
d) 1001
View Answer
Answer: c
Explanation: First the 2’s complement is found and that is added to the number and the overflow is ignored.
7 - Question
The processor keeps track of the results of its operations using flags called ________
a) Conditional code flags
b) Test output flags
c) Type flags
d) None of the mentioned
View Answer
Answer: a
Explanation: These flags are used to indicate if there is an overflow or carry or zero result occurrence.
8 - Question
The register used to store the flags is called as _________
a) Flag register
b) Status register
c) Test register
d) Log register
View Answer
Answer: b
Explanation: The status register stores the condition codes of the system.
9 - Question
The Flag ‘V’ is set to 1 indicates that _____________
a) The operation is valid
b) The operation is validated
c) The operation has resulted in an overflow
d) None of the mentioned
View Answer
Answer: c
Explanation: This is used to check the overflow occurs in the operation.
10 - Question
In some pipelined systems, a different instruction is used to add to numbers which can affect the flags upon execution. That instruction is _______
a) AddSetCC
b) AddCC
c) Add++
d) SumSetCC
View Answer
Answer: a
Explanation: By using this instruction the condition flags won’t be affected at all.
11 - Question
The most efficient method followed by computers to multiply two unsigned numbers is _______
a) Booth algorithm
b) Bit pair recording of multipliers
c) Restoring algorithm
d) Non restoring algorithm
View Answer
Answer: b
Explanation: None.
12 - Question
For the addition of large integers, most of the systems make use of ______
a) Fast adders
b) Full adders
c) Carry look-ahead adders
d) None of the mentioned
View Answer
Answer: c
Explanation: In this method, the carries for each step are generated first.
13 - Question
In a normal n-bit adder, to find out if an overflow as occurred we make use of ________
a) And gate
b) Nand gate
c) Nor gate
d) Xor gate
View Answer
Answer: d
Explanation: None.
14 - Question
In the implementation of a Multiplier circuit in the system we make use of _______
a) Counter
b) Flip flop
c) Shift register
d) Push down stack
View Answer
Answer: c
Explanation: The shift registers are used to store the multiplied answer.
15 - Question
When 1101 is used to divide 100010010 the remainder is ______
a) 101
b) 11
c) 0
d) 1
View Answer
Answer: d
Explanation: None.