Q44

Which two are true about Singletons?

A.
A Singleton must implement serializable.

B.
A Singleton has only the default constructor.         

C.
A Singleton implements a factory method.  

D.
A Singleton improves a class’s cohesion.     

E.
Singletons can be designed to be thread-safe.         

 

Risposta BE.


Riferimenti Q39