Exploring Linked Lists

What is a singly linked list?

• A singly linked list is a type of tree structure with multiple branches.

• A singly linked list is a linear data structure where each element points to the next, forming a chain.

• A singly linked list is a collection of elements that are all of the same data type.

• A singly linked list is a data structure where elements are stored in a grid format.

How does a doubly linked list differ from a singly linked list?

• A doubly linked list uses less memory than a singly linked list.

• A doubly linked list can only be traversed from the last node to the first node.

• A doubly linked list allows traversal in both directions, while a singly linked list allows traversal in only one direction.

• A singly linked list can store more data than a doubly linked list.

What are the main advantages of using a circular linked list?

• Simplified data structure

• Faster access to elements

• The main advantages of using a circular linked list include efficient traversal, continuous looping, and easier implementation of certain algorithms.

• Limited memory usage

Describe the process of inserting a node at the beginning of a singly linked list.

• Remove the last node and insert the new node in its place.

• Insert a new node at the end of the list by linking it to the last node.

• Insert a new node in the middle of the list by finding the correct position.

• Insert a new node at the beginning by updating the head to the new node and linking it to the previous head.

What is the time complexity of searching for an element in a linked list?

• O(n)

• O(1)

• O(log n)

• O(n^2)

Explain how to delete a node from a doubly linked list.

• Adjust pointers of adjacent nodes and free the node.

• Swap the node with the last node and delete the last node.

• Remove the node and leave pointers unchanged.

• Copy the node's data to the previous node and delete it.

What are the key operations that can be performed on a linked list?

• Sorting the linked list

• Merging two linked lists

• Reversing the linked list

• Key operations on a linked list include: 1. Insertion (at head, tail, or specific position), 2. Deletion (of a node), 3. Searching (for a value), 4. Traversal (visiting each node).

How can you reverse a singly linked list?

• Reverse a singly linked list by converting it to an array.

• Reverse a singly linked list by sorting it in ascending order.

• Reverse a singly linked list by iterating through it and reversing the pointers of each node.

• Reverse a singly linked list by deleting all nodes.

What is the significance of the head pointer in a linked list?

• The head pointer is a temporary variable used during traversal.

• The head pointer is the reference to the first node in a linked list.

• The head pointer points to the last node in a linked list.

• The head pointer is used to store the size of the linked list.

List some common applications of linked lists in computer science.

• Common applications of linked lists include: 1. Implementing stacks and queues 2. Dynamic memory allocation 3. Adjacency lists for graphs 4. Undo functionality in applications 5. Maintaining a list of items in a shopping cart.

• Implementing binary trees

• Sorting algorithms for static data

• Storing fixed-size arrays