It is a type of queue where elements are processed based on their order either natural or custom.

• Priority Queue

• Array List

• Min Heap

• Max Heap

Which of the following creates an empty set in Java?

• a = set()

• Set a = new HashSet ();

• A = set [ ]

• Set a = new TreeSet ();

Which statement determine whether a map contains the value "Pre-final" with the PF identifier?

• thisMap.containsKey("Pre-final");

• thisMap.containsValue("PF");

• thisMap.containsKey("PF");

• thisMap.containsValue("Prefinal");

It is a complete binary tree where the value of each parent node is either higher or lower than the value of its child nodes.

• Priority Queue

• Heap

• Array List

• Queue

Priority Queues can be implemented in Java using the PriorityQueue class from the ___________ package.

• java.scanner

• Java.io

• java.linkedlist

• java.util

A collection of elements where each element is unique.

• HashSet

• TreeSet

• Set

• LinkedHashSet

This stores its elements in a hash table without a guaranteed order upon iteration.

• Set

• HashSet

• TreeSet

• LinkedHashSet

This stores its elements in a special type of tree where elements are sorted either natural or custom during iteration.

• LinkedHashSet

• TreeSet

• HashSet

• Set

A set of ordered pairs where elements are known as keys or identifiers and values or content.

• Set

• Map

• Priority Queue

• Array List

A map can contain duplicate keys.

• True

• False