Java | Inheritance | Question 9

Predict the output of following program. Note that foo() is public in base and private in derived.

class Base {
    public void foo() { System.out.println("Base"); }
}

class Derived extends Base {
    private void foo() { System.out.println("Derived"); }
}

public class Main {
    public static void main(String args[]) {
        Base b = new Derived();
        b.foo();
    }
}

(A) Base
(B) Derived
(C) Compiler Error
(D) Runtime Error

Answer: (C)
Explanation: It is compiler error to give more restrictive access to a derived class function which overrides a base class function.
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