Which of the following operations is NOT efficient for a linked list?

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Question: Which of the following operations is NOT efficient for a linked list?

Options:

Correct Answer: Accessing an element by index

Solution:

Accessing an element by index in a linked list requires O(n) time, as it must traverse the list from the head.

Which of the following operations is NOT efficient for a linked list?

Which of the following operations is NOT efficient for a linked list?

Step 1: Understand what a linked list is. A linked list is a data structure where each element (node) points to the next one.
Step 2: Know that linked lists allow easy addition and removal of elements, but accessing elements by their position (index) is different.
Step 3: Realize that to access an element by index, you have to start from the first element (head) and go through each node one by one until you reach the desired index.
Step 4: Count how many nodes you have to go through. If there are 'n' nodes, it will take 'n' steps to find the element at a specific index.
Step 5: Understand that this process takes O(n) time, which means it is not efficient for accessing elements by index compared to other data structures like arrays.

No concepts available.