In evaluating a postfix expression, when an equal sign (=) is encountered, how many elements must the stack contain so that no error is generated?
A) none
B) one
C) two
D) three

Question

Quizplus · Accepted Answer

In a postfix expression, an equal sign (=) typically signifies an assignment operation, which requires only one element on the stack to assign a value to a variable, hence the stack must contain at least one element to avoid an error.

In Evaluating a Postfix Expression, When an Equal Sign (=)