Data Structures Lecture 3: Linked Lists
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Questions and Answers

What is a characteristic of a linked list?

  • Elements are stored at contiguous memory locations
  • The size of the linked list is fixed
  • Elements are not stored at contiguous memory locations (correct)
  • The linked list can only be traversed in reverse order

    • What is the main advantage of a linked list over an array?

  • Dynamic size (correct)
  • Less memory usage
  • Easier implementation
  • Faster search time

    • What is the term for the first node in a linked list?

  • Node
  • Pointer
  • Head (correct)
  • Tail

    • What is a limitation of arrays?

    <p>The size of the array is fixed</p> Signup and view all the answers

    What type of linked list has a reference to the previous node in the list?

    <p>Doubly linked list</p> Signup and view all the answers

    What is the purpose of step 4 in the insertAtEnd function?

    <p>To set the head of the list to the new node</p> Signup and view all the answers

    What is the function of the temp pointer in the insertAtEnd function?

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

    What happens if the list is empty when inserting a new node?

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

    What is the purpose of step 5 in the insertAtEnd function?

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

    What is the final step in the insertAtEnd function?

    <p>Set temp → next = newnode</p> Signup and view all the answers

    What is the purpose of the line newnode-&gt;next = NULL;?

    <p>To indicate that the new node is the last node in the list</p> Signup and view all the answers

    What is the purpose of the while loop in the insertatmiddle function?

    <p>To traverse the list to find the middle node</p> Signup and view all the answers

    What happens to the target node after the deletion operation?

    <p>It is removed from the list</p> Signup and view all the answers

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

    <p>To store the node to be deleted</p> Signup and view all the answers

    What is the purpose of the secondlast variable in the deleteatlast function?

    <p>To store the second-to-last node of the list</p> Signup and view all the answers

    What happens if the list only has one node and we call the deleteatlast function?

    <p>The list becomes empty</p> Signup and view all the answers

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