Which interface extends SortedSet to handle retrieval of elements based on closest-match? a. Set b. SortedSet c. NavigableSet d. Collection

Analyzing the Question

1. Understanding the Options: The question is asking which interface is an extension of SortedSet that allows for additional functionality, specifically for retrieval based on closest matches. The options provided are:

   • a. Set
   • b. SortedSet
   • c. NavigableSet
   • d. Collection

2. Understanding the Interfaces:

   • Set: The basic collection interface that does not guarantee any ordering.
   • SortedSet: Extends Set and maintains elements in a sorted order.
   • NavigableSet: Extends SortedSet, providing navigation methods that return the closest matches for given elements.
   • Collection: A root interface for all collections in Java but is not directly related to sorting or navigation.

Final Answer

The correct answer is c. NavigableSet. This interface extends SortedSet and adds methods to retrieve the closest matches to elements, among other functionalities.