Advanced quizzes – Java arrays

The following Java exercise(s) are designed for advanced level developers. If the level is too hard, then I recommend to select an easier one or you might consider reading my article about this topic, which offers a theoretical explanation including more exercises. Read More: Java Arrays


Quiz 1: A multi dimensional array

What is written to the standard output as the result of executing the following code?

public class Seat {

	private int row;
	private int col;
	private String status; // f=free, o=occupied, r=registered
	Seat[][] hall = new Seat[3 + 1][2 + 1];

	Seat(int row, int col) {
		this.row = row;
		this.col = col;
		this.status = "f";
	public void initializeHall(){
		for(int row = 1; row <= 3; row ++ ) {
			for(int col = 1; col <= 2; col ++ ) {
				hall[row][col] = new Seat(row,col);
				if(col > 1) {
					hall[row][col].status = "o";
				if(row == 2) {
					hall[row][col].status = "r";
	public static void main(String[] args){
		Seat seat = new Seat(0,0);
		for(int row = 1; row <= 3; row ++ ) {
			for(int col = 1; col <= 2; col ++ ) {
				System.out.print("-" + seat.hall[row][col].status);

Select the correct answer.

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Sar Maroof is graduated from HBO Amsterdam "higher professional education". He is a professional computer programming teacher, gives master classes and publishes technical articles. His experience with developing software started from 2001 and he has worked as a software developer for several big as well as small companies and later as a freelancer. He is the author of Java quizmaster and Build a Java application in 7 days.

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  1. The genius store caelld, they’re running out of you.

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