Quiz: Java Data Types

5 questionsNo time limitPass: 60%+10 XP on first pass

Java's 8 primitive types, declaring variables, type casting (widening and narrowing), integer division, overflow, wrapper classes and autoboxing.

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Question 1

What does this print?

public class Main {
    public static void main(String[] args) {
        System.out.println(10 / 4);
    }
}

2.5232.0

Question 2

What does this print?

public class Main {
    public static void main(String[] args) {
        double d = 9.99;
        System.out.println((int) d);
    }
}

1099.99Error

Question 3
Which line does NOT compile?
long n = 10;double d = 5;float f = 2.5;int i = 'A';

Question 4

What does this print?

public class Main {
    public static void main(String[] args) {
        char c = 'a';
        System.out.println(c + 1);
    }
}

b98a1Error

Question 5
Which converts the String "42" into an int?
(int) "42"Integer.parseInt("42")String.toInt("42")int.parse("42")