Finals Review Practice

What is the default value of an element in an array of integers in Java?

• 0

• null

• 1

• undefined

How do you Declare an array of integers in Java?

• int array[];

• array int[];

• int[] array;

• Both A and C

What will be the output of the following code?

int[] arr = new int[5];
System.out.println(arr[2]);

• null

• 0

• 2

• Error

Which of the following is true about arrays in Java?

• The length of an array can be changed after it's created

• Arrays in Java are Objects

• Arrays can contain differentt ypes of data

• All elements in an array must be initialized manually

What is the correct way to find the length of an Array in Java?

• array.length()

• array.size()

• array.length

• length(array)

Which of the following methods is used to add an element to an ArrayList in Java?

• push()

• add()

• insert()

• append()

What will be the output of the following code?
ArrayList<String> list = new ArrayList<>();

list.add("Hello");
list.add("My");
list.add("Name");

System.out.println(list.get(1));

• null

• Error

• Hello

• My

Which of the following is true about ArrayLists in Java?

• ArrayLists in Java are of a fixed size

• ArarayLists in Java can only store integers

• ArrayLists in Java can dynamically resize

What is the correct way to find the size of an ArrayList name list, in Java?

• list.length()

• list.size()

• list.length

• list.size

Which of the following is true about Java classes?

• A class can have multiple constructors

• a class can only have one constructor

• a class cannot have a constructor

• a class must always have a main method