Question 29

Truth table for the given circuit will be:

$$\text{Upper branch input to upper AND gate} = x$$

$$\text{Lower branch input to upper AND gate} = \bar{x}$$

$$\text{Output of upper AND gate} = x \cdot \bar{x} = 0$$

$$\text{Upper branch input to lower AND gate} = y$$

$$\text{Lower branch input to lower AND gate} = y$$

$$\text{Output of lower AND gate} = y \cdot y = y$$

$$z = \overline{0 \cdot y} = \overline{0} = 1$$

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