# Digital Electronics - Combinational Logic Analysis

### Exercise :: Combinational Logic Analysis - General Questions

16.

A 4-variable AND-OR circuit produces a 0 at its Y output. Which combination of inputs is correct?

 A. A = 0, B = 0, C = 1, D = 1 B. A = 1, B = 1, C = 0, D = 0 C. A = 1, B = 1, C = 1, D = 1 D. A = 1, B = 0, C = 1, D = 0

Explanation:

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17.

A 4-variable AND-OR circuit produces a 1 at its Y output. Which combination of inputs is correct?

 A. A = 0, B = 0, C = 0, D = 0 B. A = 0, B = 1, C = 1, D = 0 C. A = 1, B = 1, C = 0, D = 0 D. A = 1, B = 0, C = 0, D = 0

Explanation:

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18.

Implementing the expression using NAND logic, we get:

 A. (A) B. (B) C. (C) D. (D)

Explanation:

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19.

Implementing the expression using NAND logic, we get:

 A. (A) B. (B) C. (C) D. (D)

Explanation:

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20.

The following waveform pattern is for a(n) ________.

 A. 2-input AND gate B. 2-input OR gate C. Exclusive-OR gate D. None of the above