Stacks on Data Structure and Algorithms related Questions and Answers

Question :   Which of the following statement is incorrect with respect to infix to postfix conversion algorithm? 1. operand is always placed in the output 2. operator is placed in the stack when the stack operator has lower precedence 3. parenthesis are included in the output 4. higher and equal priority operators follow the same condition Answer :   3 - parenthesis are included in the output