Data Structures: Linked List Types
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Questions and Answers

What should the code look like to insert a new node at the beginning of the linked list?

  • ```c++ void insertFirst(int key, int data) { struct node *link = (struct node*) malloc(sizeof(struct node)); link->key = key; link->data = data; link->next = head; head->next = link; }```
  • ```c++ void insertFirst(int key, int data) { struct node *link = (struct node*) malloc(sizeof(struct node)); link->key = key; link->data = data; link->next = head; head = link; }``` (correct)
  • ```c++ void insertFirst(int key, int data) { struct node *link = (struct node*) malloc(sizeof(struct node)); link->key = key; link->data = data; link->next = head; head = link; head->next = NULL; }```
  • ```c++ void insertFirst(int key, int data) { struct node *link = (struct node*) malloc(sizeof(struct node)); link->key = key; link->data = data; link->next = head->next; head = link; }```

    • What is the purpose of the 'sort' function in the given code snippet?

  • It removes duplicate nodes from the linked list.
  • It reverses the order of nodes in the linked list.
  • It finds and removes the middle node in the linked list.
  • It arranges the nodes in ascending order based on their 'data' values. (correct)

    • What is the purpose of the 'printList' function in the given code snippet?

  • It inserts a new node at the end of the linked list.
  • It displays the data and key values of each node in the linked list. (correct)
  • It prints the number of nodes in the linked list.
  • It reverses the order of nodes in the linked list.

    • What does the operation of inserting a new node between two existing nodes involve?

    <p>Pointing the next node at the left to the new node and then pointing the new node at C.</p> Signup and view all the answers

    What is an important characteristic of a polynomial as described in the given text?

    <p>Each term consists of real number coefficients with a non-negative integer degree.</p> Signup and view all the answers

    What is the main advantage of a doubly linked list over a singly linked list?

    <p>A DLL can be traversed in both forward and backward direction</p> Signup and view all the answers

    What is the purpose of maintaining a previous pointer in a doubly linked list?

    <p>To enable traversal in both forward and backward direction</p> Signup and view all the answers

    In a circular linked list, what makes it useful for implementing a queue?

    <p>No need to maintain front and rear pointers</p> Signup and view all the answers

    What additional operation can be quickly performed on a doubly linked list compared to a singly linked list?

    <p>Insertion before a given node</p> Signup and view all the answers

    Why is it advantageous for a circular linked list to support traversal from any node?

    <p>To enable applications to repeatedly go around the list</p> Signup and view all the answers

    What is the purpose of the 'prev' pointer in a doubly linked list?

    <p>To maintain a reference to the previous node in the list</p> Signup and view all the answers

    What is the main advantage of a doubly linked list over a singly linked list?

    <p>Ease of insertion and deletion at any position</p> Signup and view all the answers

    In a doubly linked list, what operation involves adding a node after a given node?

    <p>Insert</p> Signup and view all the answers

    What additional pointer does a doubly linked list have compared to a singly linked list?

    <p>Previous pointer</p> Signup and view all the answers

    How does the insertion of a new node at the front of a doubly linked list affect the existing nodes?

    <p>The new node becomes the new head of the list</p> Signup and view all the answers

    What is a significant advantage of a Doubly Linked List (DLL) over a Singly Linked List (SLL)?

    <p>A DLL can be implemented with a single pointer</p> Signup and view all the answers

    In a Circular Linked List, what makes it useful for implementing a queue?

    <p>Node can be added only at the end of the list</p> Signup and view all the answers

    What is the purpose of maintaining a previous pointer in a Doubly Linked List?

    <p>To quickly delete a node at the end of the list</p> Signup and view all the answers

    What additional space requirement does every node of a Doubly Linked List have compared to a Singly Linked List?

    <p>Extra space for an additional data field</p> Signup and view all the answers

    Why is it advantageous for Circular Linked Lists to allow traversal from any node?

    <p>It enables faster deletion of nodes at the end of the list</p> Signup and view all the answers

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