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GATE ECE 1993 | Question-55

Boolean expression for the output of $\text{XNOR}$ (Equivalent) logic gate with inputs $A$ and $B$ is

  1. $\mathrm{A} \overline{\mathrm{B}}+\overline{\mathrm{A}} \mathrm{B}$
  2. $\overline{\mathrm{AB}}+\mathrm{AB}$
  3. $(\overline{\mathrm{A}}+\mathrm{B})(\mathrm{A}+\overline{\mathrm{B}})$
  4. $(\overline{\mathrm{A}}+\overline{\mathrm{B}})(\mathrm{A}+\mathrm{B})$

     

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