Data Structures: Linked List Module 2

Questions and Answers

What is the first step to perform when deleting a specific node from a single linked list?

Check whether the list is empty. (correct)

Reassign the head pointer.

Access the node to be deleted.

Set the next pointer of the previous node.

Which condition must be checked when deleting at the beginning of a single linked list?

If the head node has data.

If temp's next is NULL.

If temp is NULL. (correct)

If the list has more than one node.

What happens when attempting to delete the only node in the list?

The node is retained in the list.

An error message is displayed.

The node's data is cleared.

The head pointer is set to NULL. (correct)

During the deletion process at the end of the list, what condition is checked after moving to the last node?

If there is only one node remaining. Signup and view all the answers

When inserting a new node after a specific location, what must the algorithm ensure about the temp pointer?

It must not be NULL. Signup and view all the answers

What output is provided if the specified node for insertion is not found in the list?

Node not found. Insertion not possible. Signup and view all the answers

In the deletion of a specific node, which action needs to occur before deleting temp?

Update subsequent node's next pointer. Signup and view all the answers

When deleting a node at the end of the list, what must be done after identifying the last node?

Remove the last node and set pointer to NULL. Signup and view all the answers

What is the first step when inserting a new node at the beginning of a double linked list?

Create a newNode with given value and set newNode → previous as NULL Signup and view all the answers

During the insertion at the end of the list, what should the newNode's next pointer be initialized to?

NULL Signup and view all the answers

What happens if a new node's insertion point is after a node that is actually the last node?

An error message is displayed, and the operation is terminated. Signup and view all the answers

Which operation is NOT part of the deletion process in a double linked list?

Deleting from Middle of the list Signup and view all the answers

What should the head be set to if a deletion is attempted on an empty list?

NULL Signup and view all the answers

What is the last step in inserting a new node at a specific location?

Assign newNode to temp1's next Signup and view all the answers

In the deletion from the beginning of a list, what must be checked first?

If the list is empty Signup and view all the answers

What should be done if the new node's specified insertion location does not exist in the list?

Display a message indicating the node is not found. Signup and view all the answers

What does each node in a singly linked list contain?

A data field and a pointer to the next node Signup and view all the answers

Which statement correctly describes the insertion of a node at the beginning of a singly linked list?

If the list is not empty, the new node's next pointer is set to the current head. Signup and view all the answers

What must be true about the `next` field of the last node in a singly linked list?

It points to NULL. Signup and view all the answers

Which of the following is NOT a method of inserting a node into a singly linked list?

Inserting at a Random Position Signup and view all the answers

When a new node is inserted at the end of a singly linked list, which step does NOT occur?

The head pointer is updated to the new node. Signup and view all the answers

What is the role of the 'front' or 'head' in a singly linked list?

To denote the reference address of the first node. Signup and view all the answers

Which algorithmic complexity best represents the worst-case scenario for searching a value in a singly linked list?

O(n) Signup and view all the answers

Which action is NOT required when performing an insertion in a singly linked list?

Reversing the linked list. Signup and view all the answers

What is a primary disadvantage of using linked lists compared to arrays?

Memory overhead due to pointers Signup and view all the answers

Which component of a linked list node is responsible for linking to the next node?

Pointer/Reference Signup and view all the answers

What characteristic defines a circular singly linked list?

The last node points solely to the first node Signup and view all the answers

In terms of data structures, which of the following is NOT a type of linked list?

Stack Linked List Signup and view all the answers

What is a key advantage of linked lists over arrays?

Dynamic size adjustments Signup and view all the answers

Which representation can be utilized to implement a linked list?

Array Signup and view all the answers

What is the primary purpose of the head pointer in a linked list?

To provide an entry point for the list Signup and view all the answers

Which of the following statements is true regarding random access in linked lists?

Linked lists require traversal for random access Signup and view all the answers

What should be displayed if an attempt is made to delete from an empty list?

'List is Empty!!! Deletion is not possible' Signup and view all the answers

In the process of deleting the last node, what condition directly leads to setting the head to NULL?

The list has only one node. Signup and view all the answers

What should happen if the specified node to delete is not found in the list?

An error message is displayed. Signup and view all the answers

What step should be taken after identifying the node to delete if it is the first node in the list?

Move the head to the next node. Signup and view all the answers

What is the immediate action if the node to delete is the last node in the list?

Assign NULL to temp's previous next pointer. Signup and view all the answers

What condition is checked to determine if the list has only one node during deletion?

temp → previous is equal to temp → next. Signup and view all the answers

During deletion, when the list contains multiple nodes, which check is performed after confirming the node to delete is not the first?

Check if the node to delete is the last node. Signup and view all the answers

What is the initial check to perform when attempting to delete a specific node from a list?

Check whether the list is empty. Signup and view all the answers

Study Notes

Linked List Overview

A linked list is a data structure for storing a collection of elements using nodes.
Nodes are scattered in memory, each pointing to the next, allowing efficient insertions and deletions.
Each node consists of:
- Data: The value or information stored.
- Pointer/Reference: Points to the next node.
- Head: Reference to the first node, serving as the entry point.

Types of Linked Lists

Singly Linked List: Each node has a link to the next one only.
Doubly Linked List: Each node has links to both the next and previous nodes.
Circular Linked List: The last node points back to the first node, forming a circle.

Advantages of Linked Lists

Dynamic Size: Can grow and shrink as needed.
Efficient Insertions/Deletions: No need to shift elements, unlike with arrays.

Disadvantages of Linked Lists

Memory Overhead: Requires extra storage for pointers.
No Random Access: Traversal is needed to access elements, less efficient than arrays.

Singly Linked List Details

Made up of nodes, each containing a data field and a next field.
The first node's address is stored in a reference node known as "head."
The next part of the last node must be NULL.

Operations on Singly Linked List

Insertion

At the Beginning: Create a new node, check if the list is empty, set head appropriately.
At the End: Traverse to the last node and link the new node.
At a Specific Location: Traverse to the desired position before inserting the new node.

Deletion

From the Beginning: Update head, check for single node condition.
From the End: Traverse to the second last node to remove the last node.
Specific Node: Traverse to find the node before the target, adjusting pointers accordingly.

Doubly Linked List Details

Each node has two pointers: one to the next node and one to the previous node.

Operations on Doubly Linked List

Insertion

At the Beginning: Update previous pointers and head.
At the End: Traverse to the last node and link the new node.
At a Specific Location: Traverse and insert similarly to singly linked lists, maintaining both pointers.

Deletion

From the Beginning: Update head and handle single node cases.
From the End: Traverse to the second last node to adjust pointers before deletion.
Specific Node: Locate the node and update surrounding pointers before deletion.

Linked Representation of Stack and Queue

Linked lists can be used to implement both stacks (LIFO) and queues (FIFO) efficiently, taking advantage of their dynamic nature.

Applications of Linked Lists

Suitable for applications where frequent addition and removal of elements occur, such as:
- Dynamic memory allocation
- Maintaining an active list of elements, such as processes in an operating system.

Studying That Suits You

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Description

Explore the fundamentals of linked lists in this quiz from Module 2. Topics include singly linked lists, doubly linked lists, circular singly linked lists, and their applications, including linked representations of stacks and queues. Test your understanding of these crucial data structures and their uses in computer science.

Data Structures: Linked List Module 2

Questions and Answers

What is the first step to perform when deleting a specific node from a single linked list?

Which condition must be checked when deleting at the beginning of a single linked list?

What happens when attempting to delete the only node in the list?

During the deletion process at the end of the list, what condition is checked after moving to the last node?

When inserting a new node after a specific location, what must the algorithm ensure about the temp pointer?

What output is provided if the specified node for insertion is not found in the list?

In the deletion of a specific node, which action needs to occur before deleting temp?

When deleting a node at the end of the list, what must be done after identifying the last node?

What is the first step when inserting a new node at the beginning of a double linked list?

During the insertion at the end of the list, what should the newNode's next pointer be initialized to?

What happens if a new node's insertion point is after a node that is actually the last node?

Which operation is NOT part of the deletion process in a double linked list?

What should the head be set to if a deletion is attempted on an empty list?

What is the last step in inserting a new node at a specific location?

In the deletion from the beginning of a list, what must be checked first?

What should be done if the new node's specified insertion location does not exist in the list?

What does each node in a singly linked list contain?

Which statement correctly describes the insertion of a node at the beginning of a singly linked list?

What must be true about the next field of the last node in a singly linked list?

Which of the following is NOT a method of inserting a node into a singly linked list?

When a new node is inserted at the end of a singly linked list, which step does NOT occur?

What is the role of the 'front' or 'head' in a singly linked list?

Which algorithmic complexity best represents the worst-case scenario for searching a value in a singly linked list?

Which action is NOT required when performing an insertion in a singly linked list?

What is a primary disadvantage of using linked lists compared to arrays?

Which component of a linked list node is responsible for linking to the next node?

What characteristic defines a circular singly linked list?

In terms of data structures, which of the following is NOT a type of linked list?

What is a key advantage of linked lists over arrays?

Which representation can be utilized to implement a linked list?

What is the primary purpose of the head pointer in a linked list?

Which of the following statements is true regarding random access in linked lists?

What should be displayed if an attempt is made to delete from an empty list?

In the process of deleting the last node, what condition directly leads to setting the head to NULL?

What should happen if the specified node to delete is not found in the list?

What step should be taken after identifying the node to delete if it is the first node in the list?

What is the immediate action if the node to delete is the last node in the list?

What condition is checked to determine if the list has only one node during deletion?

During deletion, when the list contains multiple nodes, which check is performed after confirming the node to delete is not the first?

What is the initial check to perform when attempting to delete a specific node from a list?

Study Notes

Linked List Overview

Types of Linked Lists

Advantages of Linked Lists

Disadvantages of Linked Lists

Singly Linked List Details

Operations on Singly Linked List

Insertion

Deletion

Doubly Linked List Details

Operations on Doubly Linked List

Insertion

Deletion

Linked Representation of Stack and Queue

Applications of Linked Lists

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Description

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