Java Arrays Quiz

How do you declare an empty array of integers in Java?

• int[] myNum = {};

• int myNum = [];

• int[] myNum = [];

• int myNum[] = {};

What is the correct way to declare an array of strings in Java?

• string[] myText;

• String[] myText;

• str[] myText;

• string = myText;

What will be the output of the following code? String[] cars = {"Volvo", "BMW", "Ford", "Mazda"}; cars[0] = "Opel"; System.out.println(cars[0]);

• Volvo

• BMW

• Opel

• Mazda

What will be the output of the following code? String[] cars = {"Volvo", "BMW", "Ford", "Mazda"}; System.out.println(cars.length);

• 3

• 4

• 5

• 6

Which of the following is a valid array declaration in Java?

• String myText[];

• String myText;

• String[] myText;

• String myText[] = new String[5];

Which of the following is a correct way to initialize an array in Java?

• String[] cars = new String[4];

• String cars[] = {"Volvo", "BMW", "Ford", "Mazda"};

• String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};

• All of the above

What is the purpose of using the length property in a for loop when iterating through an array?

• To determine the type of elements in the array

• To specify how many times the loop should run

• To sort the elements in the array

• To reverse the elements in the array

Which of the following is NOT a valid way to loop through an array in Java?

• For loop

• For-each loop

• While loop

• Switch loop

What is the purpose of the 'System.out.println' statement in the loop examples?

• To modify the array

• To print each element of the array

• To calculate the length of the array

• To initialize the array

Which of the following is NOT an element in the 'ages' array?

• 22

• 35

• 90

• 18