Question

(TCO 5) A 4-bit full adder, as shown below, has inputs of A4=1, A3=0, A2=0, A1=1, B4=0, B3=1, B2=1, B1=1, and C0=1. What are the values for S4, S3, S2, S1, C4, C3, C2, and C1?

Answer 1

(9+7+1 = 17), S1=1, S2=S3=S4=0, C1=C2=C3=C4=1.

Step-by-step explanation:

(Note that the image I found of the full adder assignment, has different input values, I hope that's not a typo you made!)

The A inputs form the number 9 (1001) and B is 7 (0111), and then there is the starting carry (1). The result for S is 0001, but then there's carry C4 which acts as the most significant sum bit (S5) if there are no more inputs, so the overall sum is 1+16 = 17. The individual values are in the table.