Q.

The number of full and half adders are required to add 16-bit number is                      

A. 8 half adders, 8 full adders
B. 1 half adders, 15 full adders
C. 16 half adders, 0 full adders
D. 4 half adders, 12 full adders
Answer» B. 1 half adders, 15 full adders
Explanation: half adder has two inputs and two outputs whereas full adder has 3 inputs and 2 outputs. one half adder can add the least significant bit of the two numbers whereas full adders are required to add the remaining 15 bits as they all involve adding carries.
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