Advanced quizzes – Java arrays

Written By Sar Maroof - Sarmaroof.com

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

Article: Java arrays
Quizzes: Beginner Intermediate Advanced

arrays-red

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 &lt;= 3; row ++ ) {
			for(int col = 1; col &lt;= 2; col ++ ) {
				hall[row][col] = new Seat(row,col);
				if(col &gt; 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);
		seat.initializeHall();
		for(int row = 1; row &lt;= 3; row ++ ) {
			for(int col = 1; col &lt;= 2; col ++ ) {
				System.out.print("-" + seat.hall[row][col].status);
			}
		}
	}
}

Article: Java arrays
Quizzes: Beginner Intermediate Advanced

Suggested Articles

Sar Maroof is a professional software development teacher, gives master classes and publishes technical articles. He is also an expert software developer and worked for several big as well as small companies and later as a freelancer.