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JEE Main 2018 (15 Apr, Shift 2) · Logic Gates

Logic Gates question from JEE Main 2018 (15 Apr, Shift 2)

Q152JEE Main 2018 · 15 APR · SHIFT 2Medium

Logic Gates

Truth table for the following digital circuit will be:

Figure

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Answer: (c)

  1. Upper AND: xyxy. Lower AND gets xˉ\bar{x} and yy: xˉy\bar{x}y.
  2. z=xy⋅xˉy‾=0‾=1z = \overline{xy\cdot \bar{x}y} = \overline{0} = 1 since xxˉ=0x\bar{x} = 0.
  3. Output is 1 for all four rows.
  4. So the answer is (c).
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