Quizzes – Java primitive data types

The following Java exercise(s) are designed to help you understand the article to which it belongs. If the following quizzes are too hard, then I recommend to read the article first, which offers a theoretical explanation including examples and exercises.

Java Primitive Data Types: Article  Quizzes

 

Quiz 1: The values of the uninitialized primitive data types in Java.

What happens when the following program is compiled and run?

public class Employee {

	// Primitive data types
	double salary;
	int age;
	boolean isPaid;
	char gender = 'm'; // m = male, f = female

	public static void main(String[] args){
		Employee emp = new Employee();
		System.out.print(" " + emp.salary + ",");
		System.out.print(" " + emp.age + ",");
		System.out.print(" " + emp.isPaid + ",");
		System.out.print(" " + emp.gender);
	}
}

 

Quiz 2: An example of Java primitive data types.

What happens when the following program is compiled and run?

public class MyData {

	String name;
	int i;
	int i2 = 4;
	int i3 = i2 / i;

	public static void main(String[] args){
		MyData md = new MyData();
		System.out.print(md.i3);
	}
}

Java Primitive Data Types: Article  Quizzes

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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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