Java Interview Guide : 200+ Interview Questions and Answers - Set interfaces and implementations - HashSet, LinkedHashSe

The video tutorial covers the SET interface, emphasizing its unique characteristic of not allowing duplicate elements. It introduces the sorted set interface, which maintains elements in a sorted order, and the navigable set interface, which extends the sorted set with additional navigation methods. The tutorial also discusses implementations of the set interface, including hash set, linked hash set, and tree set, highlighting their differences in maintaining order and handling duplicates.

What is the primary characteristic of the SET interface?

• It allows duplicate elements.

• It does not allow duplicate elements.

• It maintains elements in sorted order.

• It provides navigation methods.

Which interface maintains elements in a sorted order?

• Navigable Set

• Sorted Set

• LinkedHashSet

• SET

What additional feature does the Navigable Set provide over the Sorted Set?

• Maintains insertion order

• Guarantees order of insertion

• Allows duplicate elements

• Provides navigation methods

In the hierarchy of set interfaces, which interface extends the Sorted Set?

• LinkedHashSet

• HashSet

• SET

• Navigable Set

Which implementation of the Set interface does not maintain the order of insertion?

• HashSet

• LinkedHashSet

• TreeSet

• Sorted Set

What is the main difference between HashSet and LinkedHashSet?

• HashSet allows duplicates, LinkedHashSet does not.

• HashSet maintains insertion order, LinkedHashSet does not.

• LinkedHashSet maintains insertion order, HashSet does not.

• LinkedHashSet allows duplicates, HashSet does not.

Which implementation of the Set interface stores elements in a sorted order?

• HashSet

• LinkedHashSet

• TreeSet

• Navigable Set