Objects and Classes - General Questions

What does a Java record (Java 16) generate automatically?

What is the output of the following program?

class Main {
    static String f(int x) { return "int"; }
    static String f(long x) { return "long"; }
    static String f(Integer x) { return "Integer"; }
    public static void main(String[] args) { System.out.println(f(5)); }
}

Can a constructor be declared final?

If a class defines no constructor, Java provides:

What is the output of the following program?

class Main {
    static void change(int v) { v = 100; }
    public static void main(String[] args) {
        int n = 1;
        change(n);
        System.out.println(n);
    }
}