technology medium mcq

Which logic gate outputs HIGH only when both inputs are HIGH?

  1. OR
  2. AND
  3. XOR
  4. NAND

Answer: AND

AND gate outputs 1 (HIGH) only when all inputs are 1. Truth table: 0+0→0, 0+1→0, 1+0→0, 1+1→1. Fundamental for digital circuits, arithmetic units, and control logic. NAND/NOR are universal gates (can implement any Boolean function). XOR outputs 1 when inputs differ; useful for parity checks and adders.

Topic Electronics Basics
Exam Relevance Railway JE, SSC JE, Banking

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