Beginner quizzes – Java final classes & methods

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 Final Classes And Methods

Quiz 1: Java final classes and final members

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

public final class MyFinal {

    final int x = -1;

    int getNumber(int a, int b) {
        x = 0;
        if(a > b){
            return a;
        }
        else if(a < b) {
            return b;
        }
        else {
            return x;
        }
    }
    public static void main(String[] args){
        MyFinal mf = new MyFinal();
        System.out.println(mf.getNumber(12, 11));
    }
}

Select the correct answer.

a. Illegal at compile time.

b. This program writes “0” to the standard output.

c. This program writes “-1” to the standard output.

d. This program writes “12” to the standard output.

e. This program writes “11” to the standard output.

f. This program writes “null” to the standard output.

g. This program writes nothing to the standard output.

Quiz 2: Final classes, methods and variables in Java

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

public class FinalClass {

	final int z = 5;
	final int y = 7;

	final void method(int z, int y){
		z = 6;
		System.out.print("z" + z + "-y" + this.y);
	}
	public static void main(String[] args){
		FinalClass fc = new FinalClass();
		fc.method(3,2);
	}
}

Select the correct answer.

a. This program does not compile.

b. This program writes “z6-y7” to the standard output.

c. This program writes “z3-y2” to the standard output.

d. This program writes “z6-y2” to the standard output.

e. This program writes “z3-y7” to the standard output.

f. This program writes “null” to the standard output.

g. This program writes nothing to the standard output.

Article: Java final classes and methods Quizzes: Beginner  Intermediate  Advanced

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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.

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