Digital Arithmetic Operations and Circuits - Technical MCQs

Q1:

What is the correct output of the adder in the given figure, with the outputs in the order:

A 10111

B 11101

C 01101

D 10011

ANS:A - 10111

C0 = 1
P3 + Q3 = 1 + 1 = 0,
P2 + Q2 = 0 + 1 = 1,
P1 + Q1 = 0 +1 = 1,
P0 + Q0 = 1 + 0 = 1.
=> 10111.