Oracle
1Z0-805 · Question #43
Given the fragment: public class CustomerApplication { Oracle 1Z0-805 Exam public static void main (String [] args) { CustomerDAO custDao = new CustomerDAOMemoryImp1 (); // . . . other methods } }…
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Building Database Applications with JDBC
Question
Given the fragment:
public class CustomerApplication { Oracle 1Z0-805 Exam public static void main (String [] args) { CustomerDAO custDao = new CustomerDAOMemoryImp1 (); // . . . other methods } } Which two valid alternatives to line 3 would decouple this application from a specific implementation of customerDAO?
Options
- ACustomerDAO custDao = new customerDAO();
- BCustomerDAO custDao = (CustomerDAO) new object();
- CCustomerDAO custDao = CustomerDAO.getInstance();
- DCustomerDAO custDao = (CustomerDAO) new CustomerDAOmemoryImp1();
- ECustomerDAO custDao = CustomerDAOFactory.getInstance();
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Topics
#DAO pattern#Factory pattern#decoupling#getInstance