Gate symbol recognition (textual recovery): A 2-input NAND gate is represented by an AND-gate shape with a small inversion bubble at the output. Evaluate this description.

Difficulty: Easy

Correct Answer: Correct

Explanation:


Introduction / Context:
The original item referenced a figure. Applying the recovery policy, we restate a standard textual description: a NAND gate is commonly drawn as an AND gate with an inversion bubble on its output, indicating logical negation of the AND function.


Given Data / Assumptions:

  • 2-input NAND gate.
  • Standard schematic symbol conventions.


Concept / Approach:
NAND implements NOT( A * B ). Symbolically, the AND gate shape denotes the product operation while the output bubble indicates inversion. This depiction is consistent across common drawing styles (IEEE/IEC) though graphic styles may vary.


Step-by-Step Solution:

Step 1: Recognize the base AND shape.Step 2: Identify the output bubble as inversion.Step 3: Conclude that the described symbol is a NAND gate.


Verification / Alternative check:
Truth table of NAND equals the complement of AND; the bubble signifies this complement explicitly on the output node.


Why Other Options Are Wrong:

Incorrect: Conflicts with standard symbology.Only correct in IEEE symbols: IEC variants also use explicit inversion marks.Ambiguous/Insufficient: The description is precise enough.


Common Pitfalls:
Confusing input bubbles (which denote inversion at inputs) with the single output bubble for NAND.


Final Answer:
Correct

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