Which collection type — Set or List — provides faster access to an element by its index or value?

The collection type Set provides faster existence checks for elements based on value, as it is usually implemented using hash tables or trees, which offer access in O(1) or O(log n).

List (for example, ArrayList in Android) provides quick access by index (O(1)), but searching for an element by value requires iteration (O(n)).

Summary:

• List is faster for index-based access.
• Set is faster for value-based checks.

If you need to quickly check whether an element exists, it is better to use Set. If fast access by position is important, use List.