Beginner quizzes – Java arrays

The following Java exercise(s) are designed for beginner level programmers. If the level is too hard, then I recommend reading my article about this topic, which offers a theoretical explanation including more exercises. Read More: Java Arrays

arrays-green

 

Quiz 1: Arrays in Java

What happens when you try to compile and run the following program?

import java.util.Arrays;

public class MyArray {

	public static void main(String[] args){
		char[] arrayChar = new char[4];
		arrayChar[0] = 't';
		arrayChar[1] = 'o';
		arrayChar[2] = 'c';
		arrayChar[3] = 'n';
		Arrays.sort(arrayChar);
		for(int i = 0; i < arrayChar.length; i ++ ) {
			if(i == 3 || i == 0) {
				System.out.print("-" + arrayChar[i]);
			}
		}
	}
}

Select the correct answer.


Quiz 2: Java arrays

What happens when you try to compile and run the following program?

public class MyArray {

	int[] array1 = {2,3,7,4,5,4 };
	int[] array2 = {3,4,5,6,2,2,44,5 };

	void method(){
		for(int i = 0; i < array1.length; i ++ ) {
			if(array1[i] != 4) {
				System.out.print("-x" + array1[i]);
			}
		}
	}
	public static void main(String[] args){
		MyArray ma = new MyArray();
		ma.method();
		System.out.print("-x" + ma.array2.length);
	}
}

Select the correct answer.


Please, leave your questions, feedback and suggestions in the comments below!
Sarmaroof.com offers a practical method to learn and improve your Java skills. It avoids unnecessary long boring theoretical explanations, but it uses many exercises and quizzes.


Sar Maroof's new book
Java quizmaster for beginners (English)

Java quizmaster voor beginners (Dutch)
Sar Maroof is the author of two Java books namely, Java quizmaster for beginners and A guide to build a Java application.
Experience with developing web applications since 2001
Sun Certified JSP as well as EJB
CIW Certified Internet Webmaster
Applied Science in Physics HBO Amsterdam
As well as Bachellor Science in Physics.

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  1. Awesome website! I love all your quizzes!

  2. Hello my name is Nadine and I just wanted to tell you that you are doing a great job here!

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