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Questions and Answers
What does each node in a singly linked list contain?
What does each node in a singly linked list contain?
- Data, a pointer to the next node, and a pointer to the previous node
- Data and a reference to the head node
- Data and a pointer to the previous node
- Data and a pointer to the next node (correct)
What is the key difference between a doubly linked list and a singly linked list?
What is the key difference between a doubly linked list and a singly linked list?
- Doubly linked lists do not store any data
- Each node in doubly linked lists points to both next and previous nodes (correct)
- Singly linked lists allow circular connections
- Doubly linked lists have only one pointer
When implementing 'insertAtEnd' in a linked list, what happens if the head pointer is NULL?
When implementing 'insertAtEnd' in a linked list, what happens if the head pointer is NULL?
- The list length remains the same
- The new node is assigned as the head of the list (correct)
- An error occurs
- The new node is lost
What does a circular linked list allow that a singly linked list does not?
What does a circular linked list allow that a singly linked list does not?
What will happen if 'deleteAtBeginning' is called on an empty linked list?
What will happen if 'deleteAtBeginning' is called on an empty linked list?
How is the insertion of a new node at the beginning of the list achieved in C?
How is the insertion of a new node at the beginning of the list achieved in C?
Which operation is NOT typically associated with linked lists?
Which operation is NOT typically associated with linked lists?
In a doubly linked list, how do you delete the last node?
In a doubly linked list, how do you delete the last node?
What is a characteristic feature of a doubly linked list?
What is a characteristic feature of a doubly linked list?
Which of the following statements about the insertion operation in a linked list is true?
Which of the following statements about the insertion operation in a linked list is true?
In a circular linked list, which of the following is true?
In a circular linked list, which of the following is true?
What does the traverse function output when called on a linked list with the values 5 -> 10 -> 15?
What does the traverse function output when called on a linked list with the values 5 -> 10 -> 15?
During deletion of the last node in a linked list, what happens if there is only one node in the list?
During deletion of the last node in a linked list, what happens if there is only one node in the list?
Which of the following correctly describes the deleteAtBeginning function?
Which of the following correctly describes the deleteAtBeginning function?
What is the main advantage of using a circular linked list over a singly linked list?
What is the main advantage of using a circular linked list over a singly linked list?
When a new node is inserted at the end of the list, what must happen to the last node's pointer?
When a new node is inserted at the end of the list, what must happen to the last node's pointer?
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.
