Question

The prefix form of an infix expression (p + q) – (r * t) is?

(a) + pq – *rt

(b) – +pqr * t

(c) – +pq * rt

(d) – + * pqrt

Asked question is from Stack Operations in division Abstract Data Types of Data Structures & Algorithms I

I had been asked this question in examination.

Answer 1

Correct option is (c) – +pq * rt

Easy explanation - Given Infix Expression is ((p+q)-(r*t))

(+pq)-(r*t)

(-+pq)(r*t)

-+pq*rt. Thus prefix expression is -+pq*rt.