SCJP - 13 -Given Example

What is the result?
A. BD
B. DB
C. BDC
D. DBC
E. Compilation fails.

Answer:

E is correct. The implied super() call in Bottom2’s constructor cannot be satisfied because
there isn’t a no-arg constructor in Top. A default, no-arg constructor is generated by the
compiler only if the class has no constructor defined explicitly.
A, B, C, and D are incorrect based on the above.
(Objective 1.6)
==

class Top {
public Top(String s) { System.out.print("B"); }
}
public class Bottom2 extends Top {
public Bottom2(String s) { System.out.print("D"); }
public static void main(String [] args) {

new Bottom2("C");
System.out.println(" ");
} }