Which interface in the Collection Hierarchy allows traversal through a collection of elements?Question 3Answera.Listb.Setc.Mapd.Iterator

The correct answer is d. Iterator.

Explanation:

1. The Iterator interface in the Java Collection Framework provides a way to traverse through elements of a collection, one at a time.
2. While List, Set, and Map are data structures that store elements, they do not inherently provide a traversal mechanism. Instead, these structures typically rely on the Iterator interface to allow for the iteration over their elements.
3. The Iterator interface includes methods such as hasNext() and next(), which are crucial for looping through the collection.

Thus, Iterator is the interface that specifically allows for traversal through collections in the Java Collections Hierarchy.