QuestionWhich of the following statement(s) about stack data structure is/are correct? Select one: a. Stack is the FIFO data structure b. Top of the Stack always contain the new node c. Linked List are used for implementing Stacks d. Nilll link is present in the last node at the bottom of the stack
Studdy Solution
STEP 1
1. A stack is a data structure that operates on the Last In, First Out (LIFO) principle.
2. The top node of the stack always refers to the most recently added node.
3. Linked lists are a common way to implement stacks.
4. The bottom of the stack typically has no successor node, which is often referred to as having a null link or a `None` link in the last node.
STEP 2
1. Analyze the definition and properties of a stack.
2. Evaluate each statement given in the problem against the properties and implementation details of a stack.
3. Determine which statements are correct based on the analysis.
STEP 3
Analyze the definition and properties of a stack.
A stack is a data structure that follows the Last In, First Out (LIFO) principle, meaning that the last element added to the stack will be the first one to be removed.
STEP 4
Evaluate statement (a): "Stack is the FIFO data structure."
FIFO stands for First In, First Out, which is the principle followed by queues, not stacks. Therefore, this statement is incorrect.
STEP 5
Evaluate statement (b): "Top of the Stack always contains the new node."
In a stack, the top node is indeed the most recently added node, making this statement correct.
STEP 6
Evaluate statement (c): "Linked List are used for implementing Stacks."
A linked list is a common way to implement a stack, where each node points to the next node, and the top of the stack is the head of the linked list. This statement is correct.
STEP 7
Evaluate statement (d): "Nilll link is present in the last node at the bottom of the stack."
This statement seems to have a typo ("Nilll" instead of "null" or "None"). Assuming the intended meaning is that the bottom node of the stack has no successor, this is correct because the last node in a stack (especially when implemented using a linked list) does have a null link.
STEP 8
Summarize the correct statements based on the evaluation.
Based on the analysis:
- Statement (b) is correct.
- Statement (c) is correct.
- Statement (d) is correct (assuming the typo is corrected).
Thus, the correct statements are (b), (c), and (d).
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