Question:

The logic gate which produces a LOW output only when all its inputs are HIGH is:

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NAND and NOR are "Universal Gates" because they can be used to construct any other gate.
Updated On: Apr 8, 2026
  • AND
  • OR
  • NAND
  • NOR
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The Correct Option is C

Solution and Explanation

Step 1: Concept
Examine the truth tables of standard gates.
Step 2: Analysis

An AND gate gives HIGH only when all inputs are HIGH. A NAND gate (NOT-AND) reverses this, giving LOW only when all inputs are HIGH.
Step 3: Conclusion

The gate is a NAND gate.
Final Answer: (C)
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