In a singly linked list, what is the time complexity to insert an element at the

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Question: In a singly linked list, what is the time complexity to insert an element at the beginning?

Options:

Correct Answer: O(1)

Solution:

Inserting an element at the beginning of a singly linked list is done by adjusting the head pointer, which takes constant time, O(1).

In a singly linked list, what is the time complexity to insert an element at the beginning?

In a singly linked list, what is the time complexity to insert an element at the beginning?

Step 1: Understand what a singly linked list is. It is a data structure where each element (node) points to the next one.
Step 2: Know that the first element of the list is called the head.
Step 3: To insert a new element at the beginning, you create a new node.
Step 4: Set the new node's next pointer to the current head of the list.
Step 5: Update the head pointer to point to the new node.
Step 6: Realize that these actions (creating a node and updating pointers) do not depend on the size of the list.
Step 7: Conclude that the time taken to insert at the beginning is constant, which is O(1).

Time Complexity – Understanding how the time complexity of operations varies with the size of the data structure.
Singly Linked List – Knowledge of how singly linked lists are structured and how operations like insertion work.