C Programming Quiz
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Questions and Answers

In the main() function, what is the function called that traverses the linked list?

traverseList(header)

What is the condition checked before traversing the linked list?

if(header == NULL)

What is the purpose of the temp variable in the traverseList function?

to traverse the linked list

What are the three types of insertion operations in a single linked list?

<p>Insert at front, Insert at end, Insert at any position</p> Signup and view all the answers

What are the three steps to insert a node at the beginning of a singly linked list?

<p>Create a new node, Link the newly created node with the head node, Make the new node as the head node</p> Signup and view all the answers

What happens to the head node when a new node is inserted at the front of the list?

<p>The <code>head</code> node now points to the new node</p> Signup and view all the answers

What is the purpose of the traverseList function?

<p>to print the data in the linked list</p> Signup and view all the answers

What is the data type of the header variable in the main() function?

<p>struct Node *</p> Signup and view all the answers

What is the purpose of the malloc function in the insertNodeAtBeginning function?

<p>To dynamically allocate memory for a new node.</p> Signup and view all the answers

What happens if the malloc function returns NULL in the insertNodeAtBeginning function?

<p>An error message 'Unable to allocate memory.' will be printed.</p> Signup and view all the answers

What is the purpose of the temp variable in the insertNodeAtEnd function?

<p>To traverse to the last node of the linked list.</p> Signup and view all the answers

What is the result of the while loop in the insertNodeAtEnd function?

<p>The <code>temp</code> variable will point to the last node of the list.</p> Signup and view all the answers

What is the purpose of the newNode-&gt;next = NULL statement in the insertNodeAtEnd function?

<p>To set the address part of the new node to <code>NULL</code>.</p> Signup and view all the answers

What is the purpose of the temp-&gt;next = newNode statement in the insertNodeAtEnd function?

<p>To link the last node with the new node.</p> Signup and view all the answers

What are the steps to insert a node at any position in a singly linked list?

<p>Create a new node, traverse to the n-1th position, connect the new node with the n+1th node, and connect the n-1th node with the new node.</p> Signup and view all the answers

What is the purpose of the newNode-&gt;next = temp-&gt;next statement in the insertion at any position function?

<p>To connect the new node with the n+1th node.</p> Signup and view all the answers

What is the purpose of the createList function in the given doubly linked list program?

<p>To create a doubly linked list with a specified number of nodes.</p> Signup and view all the answers

What is the role of the temp variable in the insert_position function?

<p>To traverse the list and find the correct position for inserting the new node.</p> Signup and view all the answers

What happens when the insert_position function is called with an invalid position?

<p>An error message 'Error, Invalid position' is printed.</p> Signup and view all the answers

What is the purpose of the displayList function?

<p>To print the data of all nodes in the doubly linked list.</p> Signup and view all the answers

How is the last pointer updated in the createList function?

<p>The <code>last</code> pointer is updated to point to the new node in each iteration.</p> Signup and view all the answers

What is the purpose of the reverseList() function?

<p>To reverse a singly linked list</p> Signup and view all the answers

What is the purpose of the head pointer in the doubly linked list program?

<p>To point to the first node in the doubly linked list.</p> Signup and view all the answers

What is the output of the program if the user enters an invalid position for node insertion?

<p>An error message 'Error, Invalid position' is printed.</p> Signup and view all the answers

What sorting algorithms can be used to order a linked list?

<p>Insertion sort, Selection sort, Merge sort, Quick sort, Bubble sort, etc.</p> Signup and view all the answers

What does the insertionSort() function do?

<p>Sorts a singly linked list using insertion sort</p> Signup and view all the answers

How does the insert_position function handle the insertion of a new node at a specified position?

<p>It updates the previous and next pointers of the adjacent nodes to link the new node properly.</p> Signup and view all the answers

What is the role of the sorted variable in the insertionSort() function?

<p>To store the sorted linked list</p> Signup and view all the answers

What happens to the head_ref pointer at the end of the insertionSort() function?

<p>It points to the sorted linked list</p> Signup and view all the answers

What is the purpose of the sortedInsert() function in the insertionSort() function?

<p>To insert a node into the sorted linked list</p> Signup and view all the answers

What is the purpose of the insertNodeAtMiddle function in the given code snippet?

<p>The purpose of the <code>insertNodeAtMiddle</code> function is to insert a new node at a specified position in a linked list.</p> Signup and view all the answers

What happens when the malloc function returns NULL in the insertNodeAtMiddle function?

<p>When the <code>malloc</code> function returns <code>NULL</code>, it means that the memory allocation failed, and the program prints an error message 'Unable to allocate memory.'</p> Signup and view all the answers

What is the purpose of the temp variable in the insertNodeAtMiddle function?

<p>The <code>temp</code> variable is used to traverse the linked list and find the node at the specified position where the new node is to be inserted.</p> Signup and view all the answers

What are the steps to insert a new node at a specific position in a doubly linked list?

<p>The steps to insert a new node at a specific position in a doubly linked list are: 1) Traverse to the N-1 node, 2) Create a new node, 3) Connect the new node with the next node, 4) Connect the new node with the previous node, 5) Update the previous address field of the next node, and 6) Update the next address field of the previous node.</p> Signup and view all the answers

What happens if the temp variable becomes NULL during the insertion process in the insertNodeAtMiddle function?

<p>If the <code>temp</code> variable becomes <code>NULL</code>, it means that the specified position is out of bounds, and the program prints an error message 'UNABLE TO INSERT DATA AT THE GIVEN POSITION'.</p> Signup and view all the answers

Why is it necessary to update the previous and next address fields of the nodes during the insertion process in a doubly linked list?

<p>It is necessary to update the <code>previous</code> and <code>next</code> address fields of the nodes to maintain the correct links between the nodes and ensure that the doubly linked list remains intact.</p> Signup and view all the answers

Study Notes

Traversing a Linked List

  • Traverse a list by creating a temporary node that starts at the header
  • Print the data of the current node
  • Move the position of the current node to the next node until the list is empty

Insertion in a Linked List

Insertion at Front

  • Create a new node
  • Link the new node to the head node
  • Make the new node the head node

Insertion at End

  • Create a new node and make sure its address part points to NULL
  • Traverse to the last node of the list and link it to the new node
  • Update the address part of the new node to point to NULL

Insertion at Any Position

  • Create a new node
  • Traverse to the n-1th position of the list
  • Link the new node to the n+1th node
  • Link the n-1th node to the new node

Double Linked List: Insertion at Any Position

Steps

  • Traverse to the N-1 node in the list
  • Create a new node and assign data to its data field
  • Connect the next address field of the new node to the node pointed by the next address field of the temp node
  • Connect the previous address field of the new node to the temp node
  • Update the previous address field of the node pointed by the temp.next node to the new node
  • Connect the next address field of the temp node to the new node

Doubly Linked List: Insertion at Any Position (Implementation)

  • Create a doubly linked list
  • Insert a new node at a specific position in the list
  • Display the list after insertion

Exercises

  • Write a function to insert a node at the front and at the end of a doubly linked list
  • Reversing a list using an iterative method

Reversing a List: Iterative Method

  • Initialize two nodes: prevNode and curNode
  • Traverse the list and reverse the nodes
  • Update the head of the list to the last node

Sorting a List

  • Single linked lists can be ordered using sorting algorithms such as insertion sort, selection sort, merge sort, quick sort, and bubble sort
  • Insertion sort can be used to order a single linked list

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Description

Test your knowledge of C programming concepts, including functions and data structures. This quiz covers topics commonly taught in introductory computer science courses.

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