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Which of the following is true about linked list implementation of stack?
- a)In push operation, if new nodes are inserted at the beginning of linked list, then in pop operation, nodes must be removed from end.
- b)In push operation, if new nodes are inserted at the end, then in pop operation, nodes must be removed from the beginning.
- c)None of the above
- d)Both of the above
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which of the following is true about linked list implementation of sta...
To keep the Last In First Out order, a stack can be implemented using linked list in two ways:
a) In push operation, if new nodes are inserted at the beginning of linked list, then in pop operation, nodes must be removed from beginning.
b) In push operation, if new nodes are inserted at the end of linked list, then in pop operation, nodes must be removed from end.
Community Answer
Which of the following is true about linked list implementation of sta...
Linked List Implementation of Stack
In a linked list implementation of a stack, nodes are represented as individual elements of the linked list. Each node contains a data element and a reference to the next node in the list. The top of the stack is represented by the first node in the linked list.
Push Operation
In the push operation, a new node is inserted at the beginning of the linked list. This is because the top of the stack is always the first element in the linked list. When a new element is pushed onto the stack, it becomes the new top of the stack and is added as the first node in the linked list. The reference of the new node points to the previous top of the stack.
Pop Operation
In the pop operation, the top element of the stack is removed. In a linked list implementation, this means removing the first node from the linked list. The reference to the next node is updated, and the removed node is deallocated from memory. This operation effectively moves the top of the stack to the next element in the linked list.
Option (a)
Option (a) states that if new nodes are inserted at the beginning of the linked list in the push operation, then in the pop operation, nodes must be removed from the end. This statement is incorrect because in a linked list implementation of a stack, nodes are always removed from the beginning. The top of the stack is always the first element in the linked list.
Option (b)
Option (b) states that if new nodes are inserted at the end of the linked list in the push operation, then in the pop operation, nodes must be removed from the beginning. This statement is correct. If nodes are inserted at the end of the linked list, the top of the stack will be the last element. Therefore, in the pop operation, nodes must be removed from the beginning to maintain the stack structure.
Conclusion
Based on the explanations above, option (d) is the correct answer. The linked list implementation of a stack requires inserting new nodes at the beginning and removing nodes from the beginning to maintain the stack structure.
In a linked list implementation of a stack, nodes are represented as individual elements of the linked list. Each node contains a data element and a reference to the next node in the list. The top of the stack is represented by the first node in the linked list.
Push Operation
In the push operation, a new node is inserted at the beginning of the linked list. This is because the top of the stack is always the first element in the linked list. When a new element is pushed onto the stack, it becomes the new top of the stack and is added as the first node in the linked list. The reference of the new node points to the previous top of the stack.
Pop Operation
In the pop operation, the top element of the stack is removed. In a linked list implementation, this means removing the first node from the linked list. The reference to the next node is updated, and the removed node is deallocated from memory. This operation effectively moves the top of the stack to the next element in the linked list.
Option (a)
Option (a) states that if new nodes are inserted at the beginning of the linked list in the push operation, then in the pop operation, nodes must be removed from the end. This statement is incorrect because in a linked list implementation of a stack, nodes are always removed from the beginning. The top of the stack is always the first element in the linked list.
Option (b)
Option (b) states that if new nodes are inserted at the end of the linked list in the push operation, then in the pop operation, nodes must be removed from the beginning. This statement is correct. If nodes are inserted at the end of the linked list, the top of the stack will be the last element. Therefore, in the pop operation, nodes must be removed from the beginning to maintain the stack structure.
Conclusion
Based on the explanations above, option (d) is the correct answer. The linked list implementation of a stack requires inserting new nodes at the beginning and removing nodes from the beginning to maintain the stack structure.
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Which of the following is true about linked list implementation of stack?a)In push operation, if new nodes are inserted at the beginning of linked list, then in pop operation, nodes must be removed from end.b)In push operation, if new nodes are inserted at the end, then in pop operation, nodes must be removed from the beginning.c)None of the aboved)Both of the aboveCorrect answer is option 'D'. Can you explain this answer?
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