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Which of the following statements about a circular linked list is true?
- a)It contains a pointer to the first node only.
- b)It does not support insertion and deletion.
- c)It does not require a pointer to the last node.
- d)It can be implemented using a singly linked list.
Correct answer is option 'C'. Can you explain this answer?
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Which of the following statements about a circular linked list is true...
A circular linked list can be implemented using a singly linked list, and it requires a pointer to the first node only.
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Which of the following statements about a circular linked list is true...
Explanation:
Circular linked list:
A circular linked list is a type of linked list where the last node points back to the first node, forming a circle. This means that there is no end or beginning to the list, and traversal can start from any node.
Statement analysis:
a) It contains a pointer to the first node only:
This statement is incorrect. In a circular linked list, each node contains a pointer to the next node as well as the previous node. This allows for traversal in both directions.
b) It does not support insertion and deletion:
This statement is incorrect. Circular linked lists support insertion and deletion operations just like regular linked lists. Nodes can be added or removed from anywhere in the list.
c) It does not require a pointer to the last node:
This statement is true. In a circular linked list, since the last node points back to the first node, there is no need for a separate pointer to keep track of the last node. This makes operations like insertion and deletion more efficient.
d) It can be implemented using a singly linked list:
This statement is incorrect. A circular linked list requires each node to have a pointer to the next node, as well as the previous node in a doubly linked list. A singly linked list only has a pointer to the next node, so it cannot be directly used to implement a circular linked list.
Circular linked list:
A circular linked list is a type of linked list where the last node points back to the first node, forming a circle. This means that there is no end or beginning to the list, and traversal can start from any node.
Statement analysis:
a) It contains a pointer to the first node only:
This statement is incorrect. In a circular linked list, each node contains a pointer to the next node as well as the previous node. This allows for traversal in both directions.
b) It does not support insertion and deletion:
This statement is incorrect. Circular linked lists support insertion and deletion operations just like regular linked lists. Nodes can be added or removed from anywhere in the list.
c) It does not require a pointer to the last node:
This statement is true. In a circular linked list, since the last node points back to the first node, there is no need for a separate pointer to keep track of the last node. This makes operations like insertion and deletion more efficient.
d) It can be implemented using a singly linked list:
This statement is incorrect. A circular linked list requires each node to have a pointer to the next node, as well as the previous node in a doubly linked list. A singly linked list only has a pointer to the next node, so it cannot be directly used to implement a circular linked list.
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Which of the following statements about a circular linked list is true?a)It contains a pointer to the first node only.b)It does not support insertion and deletion.c)It does not require a pointer to the last node.d)It can be implemented using a singly linked list.Correct answer is option 'C'. Can you explain this answer?
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