Computer Science for IGCSE & O level - Data Representation (Section 16 - No. 21)
What is the role of the leftmost bit in a two's complement representation?
It always indicates a positive number.
It always indicates a negative number.
It indicates the sign (positive or negative) of the number.
It is irrelevant to the sign of the number.
Explanation
In two's complement, the leftmost bit signifies the sign of the number; 0 indicates positive, 1 indicates negative.
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