Question

The gates required to build a half adder are __________

(a) EX-OR gate and NOR gate

(b) EX-OR gate and OR gate

(c) EX-OR gate and AND gate

(d) EX-NOR gate and AND gate

I have been asked this question by my college professor while I was bunking the class.

This key question is from Logic Gates and Networks in division Boolean Algebra and Minimization Techniques and Logic Gates of Digital Circuits

Answer 1

The correct answer is (c) EX-OR gate and AND gate

The best explanation: The gates required to build a half adder are EX-OR gate and AND gate. EX-OR outputs the SUM of the two input bits whereas AND outputs the CARRY of the two input bits.