MC Consider this small example of Java code:

public class Contact{
  String firstname;
  String lastname;
  int phonenumeber;
  String mailaddress;
  public void Contact(String fname, String lname, int number, String mail){
    this.firstname = fname;
    this.lastname = lname;
    this.phonenumber = number;
    this.mailaddress = mail;
  }
  public void Contact(String fname, String lname, int number){
    this.firstname = fname;
    this.lastname = lname;
    this.phonenumber = number;
  }
}

Which of the following OO principles is illustrated here? Method overriding and encapsulation incorrect Method overriding incorrect Method overloading correct Method overloading and encapsulation incorrect MC Which statement is CORRECT? Dynamic binding allows for polymorphism. correct In inheritance, a subclass only inherits the variables of its superclass. incorrect Method overloading occurs when we use the same name for different methods across different classes. incorrect A class must have exactly one constructor. incorrect MC Which statement is CORRECT? In an inheritance structure with a parent-class "Animal" and sub-class "Chicken" at most 1 of these classes is allowed to have a method with name "makeNoise". incorrect Dynamic binding means that objects are allowed to take the form of either the class they are an instance of, or any of its sub classes. incorrect Static binding occurs at run-time whereas dynamic binding occurs at compile-time. incorrect Different subclasses of a parent class can all have different implementations of methods with the same name, number of parameters and parameter types. correct MC Which statement is CORRECT? A class must have exactly one constructor. incorrect In inheritance, a subclass only inherits the variables of its superclass. incorrect Dynamic binding allows for polymorphism. correct Method overloading occurs when we use the same name for different methods across different classes. incorrect MC Which statement is CORRECT? ODL is only optimized for Java objects. incorrect Many-to-many relationships cannot be expressed using ODL. incorrect The extent of a class is the set of all current instances. correct Unary, binary and ternary relationships are supported in ODL. incorrect MC If we have two customers who have the same values for all their attributes (same name, address, phone number etc). However, their referred purchase orders have different values for their variables. Which equality applies in this situation? Deep equality incorrect No equality incorrect Shallow equality correct Both shallow and deep equality. incorrect MC Given the following two statements:

i. Persistence orthogonality implies two properties: persistence independence and type orthogonality.
ii. Serialization for object persistence eliminates all the disadvantages associated with the file-based approach to data management.

Which statement is CORRECT? Statement ii is correct but statement i is not correct. incorrect Both statements are correct. incorrect Both statements are not correct. correct Statement i is correct, but statement ii is not correct. incorrect MC Which statement is CORRECT? ODL is only optimized for Java objects. incorrect The extent of a class is the set of all current instances. correct Many-to-many relationships cannot be expressed using ODL. incorrect Unary, binary and ternary relationships are supported in ODL. incorrect MC In Java, what is method overloading? Offering the user of your class all possible methods that he/she would like to perform on the variables the class offers. incorrect Using two methods with the same name, but a different number (and/or different type) of arguments. correct Making sure that every method uses all variables of the class. incorrect Putting so much code in a method that its functionality becomes hard to understand. incorrect MC Which statement is NOT CORRECT? OODBMSs typically deliver worse performance for complex queries than RDBMSs. correct The OQL language provides no explicit support for INSERT, UPDATE, and DELETE operations. incorrect Dynamic binding is also called virtual method invocation. incorrect Encapsulation implies that the methods of a class are not accessible to the other classes. incorrect