Which data structure provides faster performance for adding and removing elements: ArrayList or LinkedList?

LinkedList provides faster performance when adding and removing elements, especially in the middle or at the beginning of the list. This is because in LinkedList, insertion and deletion operations are performed by changing links between nodes, without the need to shift elements.

In ArrayList, adding or removing elements (except at the end of the list) requires shifting subsequent elements, which takes more time.

Summary:

• LinkedList is faster for frequent insertions and deletions in the middle or at the beginning.
• ArrayList is faster for index access and adding at the end.

Example:

List<Integer> arrayList = new ArrayList<>();
List<Integer> linkedList = new LinkedList<>();

// Adding at the beginning
arrayList.add(0, 1); // slower due to shifting
linkedList.add(0, 1); // faster