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
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
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.