How do methods of searching for elements in ArrayList and LinkedList differ by index?

Searching for an element by index in ArrayList and LinkedList differs in performance due to their internal structure:

• ArrayList is implemented based on an array. Accessing an element by index occurs in constant time O(1), as you can directly access the required array cell.

• LinkedList is implemented as a doubly linked list. To get an element by index, you need to traverse the list from the beginning or end to the desired position, which takes O(n) time in the worst case.

Therefore, if quick access by index is frequently required, it is better to use ArrayList. LinkedList is suitable if elements are frequently added or removed in the middle of the list, but index access is slow there.