A logic circuit that provides a HIGH output for both inputs HIGH or both inputs LOW is ____________(a) Ex-NOR gate(b) OR gate(c) Ex-OR gate(d) NAND gateThis question was addressed to me at a job interview.My question is from 4-Bit Parallel Adder/Subtractor topic in portion Arithmetic Circuits of Digital Circuits

A logic circuit that provides a HIGH output for both inputs HIGH or bo

1.	A logic circuit that provides a HIGH output for both inputs HIGH or both inputs LOW is ____________(a) Ex-NOR gate(b) OR gate(c) Ex-OR gate(d) NAND gateThis question was addressed to me at a job interview.My question is from 4-Bit Parallel Adder/Subtractor topic in portion Arithmetic Circuits of Digital Circuits
Answer» The correct option is (a) Ex-NOR gate The BEST explanation: EX-OR gate gives 1 if both inputs are DIFFERENT means 0 or 1 and gives 0 if both are same and EX-NOR is OPPOSITE of EX-OR gate, so it provides a HIGH output for both inputs HIGH or both inputs are LOW. Thus, EX-NOR produces output for even number of 1’s or all 0s, while EXOR produces output for ODD number of 1’s.

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