Quiz 02 - ArrayList

What is the main difference between a built-in array and an ArrayList in Java?

• Arrays can store objects only.

• ArrayLists can be resized dynamically.

• Arrays can be resized dynamically.

• ArrayLists can only store strings.

Which method is used to add an element to an ArrayList?

• append()

• add()

• insert()

• push()

How do you access the first element of an ArrayList named 'cars'?

• cars[0]

• cars.get(1)

• cars.get(0)

• cars.first()

Which method would you use to remove an element from an ArrayList?

• erase()

• discard()

• remove()

• delete()

What does the size() method return?

• The type of elements in the ArrayList.

• The index of the last element.

• The maximum capacity of the ArrayList.

• The number of elements in the ArrayList.

Which of the following is a valid way to create an ArrayList of integers?

• ArrayList numbers = new ArrayList();

• ArrayList numbers = new ArrayList();

• ArrayList numbers = new ArrayList();

• ArrayList numbers = new ArrayList();

What method is used to sort an ArrayList?

• organize()

• sort()

• order()

• arrange()

Which of the following is true about ArrayList elements?

• They can only be primitive types.

• They can be of any object type.

• They must be of the same type.

• They cannot be null.

What will the following code print?

ArrayList cars = new ArrayList();

cars.add('RAIZE');

System.out.println(cars);

• Error

• [RAIZE]

• RAIZE

• []

How do you modify an element in an ArrayList?

• edit()

• change()

• set()

• update()