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 is graduated from HBO Amsterdam “higher professional education” when he already had a bachelor of science degree in Physics.
He is a SUN certified JSP as well as EJB. He has experience with Java since 2001 and worked 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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2 Comments

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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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