Q46

MCQ2 marks, −0.5

Consider the ALU shown below.

If the operands are in $2’s$ complement representation, which of the following operations can be performed by suitably setting the control lines $K$ and $C_0$ only (+ and – denote addition and subtraction respectively)?

(A)

$A + B$ , and $A – B$ , but not $A + 1$

(B)

$A + B$ , and $A + 1$ , but not $A – B$

(C)

$A + B$ , but not $A – B$ or $A + 1$

(D)

$A + B$ , and $A – B$ , and $A + 1$

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