Which of the following statements are correct about the Stack collection?1. It can be used for evaluation of expressions.2. All elements in the Stack collection can be accessed using an enumerator.3. It is used to maintain a FIFO list.4. All elements stored in a Stack collection must be of similar type.5. Top-most element of the Stack collection can be accessed using the Peek() method.
A)1 and 2 only
B)3 and 4 only
C)1, 2 and 5 only
D)All of the above

Question

Quizplus · Accepted Answer

1. Stacks are indeed used for expression evaluation, such as in the case of converting infix expressions to postfix and their evaluation.2. All elements in a Stack can be accessed using an enumerator, though it does not provide direct access by index.5. The Peek() method is used to look at the top-most element of the Stack without removing it, which is a fundamental operation of stack data structures. 3 is incorrect because Stacks are LIFO (Last In, First Out), not FIFO (First In, First Out).4 is incorrect because a Stack can hold elements of different types, especially in languages like C# where the Stack class is generic.

Which of the Following Statements Are Correct About the Stack