Question

What advantage does TreeSet have over HashSet?

a) Faster insertion and retrieval
b) No need for sorting
c) Smaller memory footprint
d) Better for numeric data

Answer 1

The advantage of TreeSet over HashSet is no need for sorting. TreeSet is useful for numeric data and provides methods for retrieving elements in a specific order, unlike HashSet. However, TreeSet may have slower insertion and retrieval time compared to HashSet.

Step-by-step explanation:

The advantage that TreeSet has over HashSet is no need for sorting. TreeSet is an implementation of the SortedSet interface, which automatically sorts the elements in a natural order or using a custom comparator. On the other hand, HashSet does not maintain any particular order of its elements.

Additionally, TreeSet can be useful when dealing with numeric data, as it provides methods to retrieve the elements in ascending or descending order. This is not a feature of HashSet.

However, it is important to note that TreeSet may have a slower insertion and retrieval time compared to HashSet, as the elements need to be sorted. HashSet, on the other hand, has constant time performance for insertion, retrieval, and removal operations.