# Digital Electronics - Combinational Logic Circuits

### Exercise :: Combinational Logic Circuits - Filling the Blanks

1.

For the XNOR gate truth table shown below, the values for w, x, y, and z are ____, ____, ____, and ____, respectively. A. 1, 0, 0, 1 B. 0, 1, 0, 1 C. 1, 1, 1, 0 D. 1, 0, 0, 0

Explanation:

No answer description available for this question. Let us discuss.

2.

A half-adder does not have ________.

 A. carry in B. carry out C. two inputs D. all of the above

Explanation:

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3.

The equation ________ cannot be further simplified.

 A. B. C. D. Explanation:

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4.

________ is a correct combination for an ODD-parity data transmission system.

 A. data = 1101 1011 parity = 1 B. data = 1101 0010 parity = 0 C. data = 0001 0101 parity = 1 D. data = 1010 1111 parity = 0

Explanation:

No answer description available for this question. Let us discuss.

5.

A circuit that can convert one of ten numerical keys pressed on a keyboard to BCD is a ________.

 A. priority encoder B. decoder C. multiplexer D. demultiplexer