Assignment 3

If the initial capacity of an ArrayList is set to 10, what will be the new capacity of the ArrayList when 11th element is added

• 10

• 15

• 20

• 30

What is the difference between a List and a Set in Java Collections?

• List allows duplicate elements, while a Set does not

• A List does not allow duplicate elements, while a Set does

• A List is ordered, while a Set is not

• A List is not ordered, while a Set is

Which Java Collection class provides a sorted order?

• List

• Set

• Map

• Queue

What is the difference between ArrayList and LinkedList in Java?

• ArrayList is an ordered collection while LinkedList is an unordered collection.

• ArrayList is faster for insertion and removal operations while LinkedList is faster for random access operations.

  C.

• ArrayList uses a doubly linked list data structure while LinkedList uses an array data structure.

• There is no difference between ArrayList and LinkedList in Java.

Which of the following is true about HashMap in Java?

• HashMap allows null keys and null values.

• HashMap is a synchronized collection.

• HashMap maintains insertion order of its elements.

• HashMap is an ordered collection.

What is the output of the following code snippet?

Map<String, Integer> ages = new HashMap<>();

ages.put("John", 25);

ages.put("Emma", 30);

ages.put("Michael", 35);

ages.remove("John");

System.out.println(ages.containsKey("John"));

• true

• false

• null

• Compilation error

The collection_______________________

• extends Collections class

• extends Iterable interface

• implements Serializable interface

• implements Traversable interface

List, Set and Queue __________ Collection.

• extends

• implements

• both of the above

• none of the above

Which among the following maintains the insertion order of the elements?

• List

• Set

• Map

• All of the above

Which among the following stores element in ascending order?

• ArrayList

• HashSet

• TreeSet

• Both A & C