Language Fundamentals - General Questions

What is the output of the following program?

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

What is the default value of an int field (instance variable)?

What is the size of a char in Java?

Which of these is NOT a Java primitive type?

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        byte b = (byte) 130;
        System.out.println(b);
    }
}