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Q. |
Half-adders have a major limitation in that they cannot |
A. | accept a carry bit from a present stage |
B. | accept a carry bit from a next stage |
C. | accept a carry bit from a previous stage |
D. | accept a carry bit from the following stages |
Answer» C. accept a carry bit from a previous stage | |
Explanation: half-adders have a major limitation in that they cannot accept a carry bit from a previous stage, meaning that they cannot be chained together to add multi-bit numbers. however, the two output bits of a half-adder can also represent the result a+b=3 as sum and carry both being high. |
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