Operators and Assignments - General Questions

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        System.out.println(0.1 + 0.2 == 0.3);
    }
}

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        System.out.println(-7 % 3);
    }
}

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        int a = 5;
        int b = a++ + ++a;
        System.out.println(a + " " + b);
    }
}