Java OCA OCP Practice Question 126

Question

Given: 

class MyBaseClass { 
  public MyBaseClass(String s) { 
      System.out.print("B"); 
  } //from w  w  w .  j av  a2  s  .c  o m
} 
public class MyClass extends MyBaseClass { 
  public MyClass(String s) { 
      System.out.print("D"); 
  } 
  public static void main(String [] args) { 
    new MyClass("C"); 
    System.out.println(" "); 
  } 
}

What is the result? 

A.   BD 
B.   DB 
C.   BDC 
D.   DBC 
E.   Compilation fails 



E is correct.

Note

The implied super() call in MyClass's constructor cannot be satisfied because there is no no-arg constructor in MyBaseClass.

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.




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