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Questions and Answers
What does each node in a singly linked list contain?
What is the key difference between a doubly linked list and a singly linked list?
When implementing 'insertAtEnd' in a linked list, what happens if the head pointer is NULL?
What does a circular linked list allow that a singly linked list does not?
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What will happen if 'deleteAtBeginning' is called on an empty linked list?
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How is the insertion of a new node at the beginning of the list achieved in C?
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Which operation is NOT typically associated with linked lists?
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In a doubly linked list, how do you delete the last node?
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What is a characteristic feature of a doubly linked list?
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Which of the following statements about the insertion operation in a linked list is true?
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In a circular linked list, which of the following is true?
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What does the traverse function output when called on a linked list with the values 5 -> 10 -> 15?
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During deletion of the last node in a linked list, what happens if there is only one node in the list?
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Which of the following correctly describes the deleteAtBeginning function?
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What is the main advantage of using a circular linked list over a singly linked list?
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When a new node is inserted at the end of the list, what must happen to the last node's pointer?
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Study Notes
Introduction to Linked List
- A linked list is a linear data structure where elements (nodes) are linked using references, not stored in contiguous memory locations.
- Each node in a linked list contains two parts: data (the node's value) and a pointer (a reference to the next node).
Types of Linked Lists
-
Singly Linked List:
- Nodes point to the next node; the last node points to NULL.
-
Doubly Linked List:
- Each node has two pointers, one for the next node and one for the previous node.
-
Circular Linked List:
- The last node's pointer points back to the first node, forming a circular structure.
Basic Operations on Linked Lists
-
Insertion:
- Can occur at the beginning, end, or a specific position.
- At the Beginning: Creates a new node, points its next to the current head, and updates the head.
- At the End: Creates a new node, traverses to the last node, and links the last node to the new node.
-
Deletion:
- Can be performed at the beginning, end, or a specific position.
- At the Beginning: Updates the head to the next node and frees the old head.
- At the End: Traverses to the last node, updates the second last node's next pointer to NULL, and frees the last node.
-
Traversal:
- Iterates through the linked list from the head to the end, printing each node's data until NULL is reached.
Introduction to Linked List
- A linked list is a linear data structure where elements (nodes) are linked using references, not stored in contiguous memory locations.
- Each node in a linked list contains two parts: data (the node's value) and a pointer (a reference to the next node).
Types of Linked Lists
-
Singly Linked List:
- Nodes point to the next node; the last node points to NULL.
-
Doubly Linked List:
- Each node has two pointers, one for the next node and one for the previous node.
-
Circular Linked List:
- The last node's pointer points back to the first node, forming a circular structure.
Basic Operations on Linked Lists
-
Insertion:
- Can occur at the beginning, end, or a specific position.
- At the Beginning: Creates a new node, points its next to the current head, and updates the head.
- At the End: Creates a new node, traverses to the last node, and links the last node to the new node.
-
Deletion:
- Can be performed at the beginning, end, or a specific position.
- At the Beginning: Updates the head to the next node and frees the old head.
- At the End: Traverses to the last node, updates the second last node's next pointer to NULL, and frees the last node.
-
Traversal:
- Iterates through the linked list from the head to the end, printing each node's data until NULL is reached.
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Description
Explore the fundamentals of linked lists, a crucial data structure in computer science. Learn about the different types of linked lists, including singly, doubly, and circular linked lists, along with basic operations like insertion and deletion.
