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| Q. |
The full subtractor can be implemented using |
| A. | two xor and an or gates |
| B. | two half subtractors and an or gate |
| C. | two multiplexers and an and gate |
| D. | two comparators and an and gate |
| Answer» B. two half subtractors and an or gate | |
| Explanation: a full subtractor has 3 input bits and two outputs bits borrow and difference. the full subtractor can be implemented using two half subtractors and an or gate. | |
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