Question

Which of the following is essential for converting an infix expression to the postfix form efficiently?

• A. An operator stack
• B. An operand stack
• C. An operand stack and an operator stack
• D. A parse tree

Hint:

The key data structure for converting infix to postfix is the operator stack, which helps in maintaining the correct precedence of operators during the conversion.

Answer 1

The Correct Option is A

To convert an infix expression to postfix, we need an operator stack to hold operators temporarily and maintain the correct order of operations. The operands are simply output directly when encountered, while operators are pushed onto the stack and popped when necessary based on operator precedence.
Therefore, the correct answer is 1. An operator stack.