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| Q. |
Which one is a basic comparator? |
| A. | xor |
| B. | xnor |
| C. | and |
| D. | nand |
| Answer» A. xor | |
| Explanation: generally, an xnor outputs high for even number of 1s or all 0s and outputs low for otherwise. thus, an xnor gate is a basic comparator, because its output is “1” only if its two input bits are equal. | |
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