The expression Y = A applies to which device in digital logic?

The expression Y = A applies to which device in digital logic?

• A. Non-inverting buffer
• B. Inverting buffer
• C. AND gate
• D. OR gate

Answer: (A)

Y = A means the output mirrors the input exactly, with no inversion. That behavior is what a non-inverting buffer provides: it passes A through to Y unchanged, so Y equals A for all input values. If it were the other type, the output would be the opposite of A (inversion). If it were a two-input gate like AND or OR, the output would depend on another input as well and would not simply equal A. In practice, a non-inverting buffer is used to restore or drive a signal without changing its logic state, which matches the idea that Y follows A directly.

Y = A means the output mirrors the input exactly, with no inversion. That behavior is what a non-inverting buffer provides: it passes A through to Y unchanged, so Y equals A for all input values. If it were the other type, the output would be the opposite of A (inversion). If it were a two-input gate like AND or OR, the output would depend on another input as well and would not simply equal A. In practice, a non-inverting buffer is used to restore or drive a signal without changing its logic state, which matches the idea that Y follows A directly.