Question

Which of the examples below expresses the commutative law of multiplication?

(a) A + B = B + A

(b) A • B = B + A

(c) A • (B • C) = (A • B) • C

(d) A • B = B • A

The question was posed to me in an internship interview.

My question is based upon K-Map Simplification topic in division Arithmetic Circuits of Digital Circuits

Answer 1

Correct answer is (d) A • B = B • A

The explanation is: The commutative law of multiplication is (A * B) = (B * A).

The commutative law of addition is (A + B) = (B + A).