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Previous Year Question (PYQs)



The addition of 4 bit, 2’s complement binary numbers 1101 and 0100 results in





Solution

1101 is a 4-bit 2’s complement number.
Its MSB is 1, so it is negative.

1101 = −3
0100 = +4

Adding:
1101
+0100
=10001

Taking only 4 bits → 0001


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