GATE ECE 1999 | Boolean Algebra Question 25 | Digital Circuits

GATE ECE 1999

MCQ (Single Correct Answer)

-0.6

For a binary half-subtractor having two inputs A and B, the correct set of Logical expressions for the output D(=Aminus B) and X(=Borrow) are

D = AB + $$\overline A B,X = \overline A B$$

$$D = \,\overline A B + A\overline B + A\overline B , X= A\overline B $$

$$D = \overline A B + A\overline B ,X = \overline A B$$

$$D = AB + \overline A \,\overline {\,B} ,X = A\overline B $$

GATE ECE 1999

MCQ (Single Correct Answer)

-0.6

The minimized form of the logical expression ($$\overline A \,\overline B \,\overline C + B\overline C + \overline A B\overline C + \overline A BC + AB\overline C )$$

$$\overline A \overline C + B\overline C + \overline A B$$

$$A\overline C + \overline B C + \overline A B$$

$$\overline A C + \overline B C + \overline A B$$

$$A\overline C + \overline B C + A\overline B $$

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