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Question

An overflow condition can be detected by observing the carry into the sign bit position and the carry out of the sign bit position. If these two carriers are............an overflow condition is produced.

A
Equal
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B
Not equal
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C
Negative
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D
Positive
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Solution

The correct option is B Not equal

An overflow condition can be detected by observing the carry into the sign bit position and the carry out of the sign bit position. If these two carriers are not equal an overflow condition is produced.

Arithmetic operations have a potential to run into a condition known as overflow.

Overflow occurs with respect to the size of the data type that must accommodate the result.

Overflow indicates that the result was too large or too small to fit in the original data type.

When two signed 2's complement numbers are added, overflow is detected if:

1. both operands are positive and the result is negative, or

2. Both operands are negative and the result is positive.

When two unsigned numbers are added, overflow occurs if there is a carry out of the leftmost bit.


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