# Evaluation of a Postfix Expression Multiple choice Questions and Answers (MCQs)

## Evaluation of a Postfix Expression Multiple choice Questions and Answers (MCQs)

 Question 1
What is the other name for a postfix expression?
 A Normal polish Notation B Reverse polish Notation C Warsaw notation D Infix notation
Question 1 Explanation:
Reverse polish Notation is the other name for a postfix expression whereas Polish Notation, Warsaw notation are the other names for a prefix expression.

 Question 2
Which of the following is an example for a postfix expression?
 A a*b(c+d) B abc*+de C +ab D a+b-c
Question 2 Explanation:
abc*+de is a postfix expression. +ab is a prefix expression and others are infix expressions.

 Question 3
Reverse Polish Notation is the reverse of a Polish Notation
 A True B False
Question 3 Explanation:
Reverse Polish Notation is not the reverse of a polish notation. Though both NPN and RPN read the expression from left to right, they follow different strategies.

 Question 4
What is the time complexity of evaluation of postfix expression algorithm?
 A O (N) B O (N log N) C O (N2) D O (M log N)