The circuit shown in figure performs addition as well as subtraction. If 4-bit binary numbers A(A3,A2,A1,A0) = 1011 and B(B3,B2,B1,BO) = 1111 are applied to this circuit. When the signal S =1, what are the values for the sum and carry output? B3 A3 B2 A2 B, A, Bo Ao C2 FA FA FA FA C4 S3 So O a. S3S2S1S0 = 1111 and CO = 0 Ob. S3S2S1SO = 1110 and CO = 1 O c. S3S2S1S0 = 1100 and CO = 0 O d. S3S2S1SO = 1101 and CO = 1

Computer Networking: A Top-Down Approach (7th Edition)
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The circuit shown in figure performs addition as well as subtraction. If 4-bit binary numbers A(A3,A2,A1,AO) = 1011 and B(B3,B2,B1,B0) = 1111
are applied to this circuit. When the signal S =1, what are the values for the sum and carry output?
B3
Аз
B2
A2
B,
A1
Bo
Ao
C3
C2
FA
FA
FA
FA
Co
C4
S2
So
Oa.
S352S1S0 = 1111 and CO = 0
Ob.
S3S2S1SO = 1110 and CO = 1
O c. S3S2S1SO = 1100 and CO = 0
O d. S3S2S1SO = 1101 and CO = 1
Transcribed Image Text:The circuit shown in figure performs addition as well as subtraction. If 4-bit binary numbers A(A3,A2,A1,AO) = 1011 and B(B3,B2,B1,B0) = 1111 are applied to this circuit. When the signal S =1, what are the values for the sum and carry output? B3 Аз B2 A2 B, A1 Bo Ao C3 C2 FA FA FA FA Co C4 S2 So Oa. S352S1S0 = 1111 and CO = 0 Ob. S3S2S1SO = 1110 and CO = 1 O c. S3S2S1SO = 1100 and CO = 0 O d. S3S2S1SO = 1101 and CO = 1
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