[hardwired]

The easiest way to find out is to make up a test app.

Code:

public class MasterTest {
    public static void main(String[] args) {
        Master master = new Master();
        A a = new A();
        // exercise/test your classes...
    }
}

class Master {
    String name;

    Master(String name) {
        this.name = name;
    }

    public void rideTheHorse() {
        System.out.println("riding the horse":
    }

    // other methods
    // try methods that return something

    public String toString() {
        return name;
    }
}

class A extends Master() {
    // call methods and access fields of superclass
}

Can inheritance be private?
Possibly, depends on what you have in mind. We have the private access modifier and the final keyword available. Play with them in your test app.