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 Unary, binary and ternary relationships are supported in ODL. incorrect Many-to-many relationships cannot be expressed using ODL. incorrect MC Which building block of the object model of the ODMG standard is defined below:

Struct Course{
integer ID;
string name;
}; Structured object incorrect Structured literal correct Collection literal incorrect Collection object incorrect MC Which statement is CORRECT? An object contains the blueprint description of all its characteristics. incorrect Information hiding is achieved by hiding certain variables to the outside world to ensure that they can never be retrieved or modified. incorrect Encapsulation of variables is used to control how and when certain variables are accessed and modified. correct All of the above statements are correct. 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? Both shallow and deep equality. incorrect Deep equality incorrect Shallow equality correct No equality incorrect MC What is NOT an advantage of OODBMSs? They solve the impedance mismatch problem by using the same data model as the programming language. incorrect The identity based approach allows for improved performance when performing complex queries involving multiple interrelated objects, avoiding expensive joins. incorrect They allow to store objects and relationships in a transparent way. incorrect Scalability and fault-tolerance of OODBMSs is far better than that of their relational counterparts. correct MC Which statement is NOT CORRECT? Objects are blueprints of classes. "Human", "Employee", "Sale" are examples of objects. correct A class can be instantiated into several objects. incorrect Objects are instances of classes. The people "Bart Baesens", "Wilfried Lemahieu" and "Seppe vanden Broucke" could be instances of the class "Person". incorrect Objects store both a piece of information and ways to manipulate this information. incorrect MC Which statement is CORRECT? An object contains the blueprint description of all its characteristics. incorrect Information hiding is achieved by hiding certain variables to the outside world to ensure that they can never be retrieved or modified. incorrect Encapsulation of variables is used to control how and when certain variables are accessed and modified. correct All of the above statements are correct. incorrect MC Which building block of the object model of the ODMG standard is defined below:

Struct Course{
integer ID;
string name;
}; Structured literal correct Collection object incorrect Collection literal incorrect Structured object incorrect MC Which statement is NOT CORRECT? When using dynamic binding, the OO environment will first check the class at the top of inheritance hierarchy for the called method. If the called method does not exist in this class, the system will look in its subclass. If it still finds no match, it will look in the next subclass and so on throughout the entire hierarchy. correct Static binding binds a method to its implementation at compile time. incorrect Dynamic binding is also called virtual method invocation. incorrect When subclasses override one or more methods from their superclass, polymorphism allows the objects from the subclasses to respond differently to the same method. incorrect MC Which statement is NOT CORRECT? Objects store both a piece of information and ways to manipulate this information. incorrect A class can be instantiated into several objects. incorrect Objects are instances of classes. The people "Bart Baesens", "Wilfried Lemahieu" and "Seppe vanden Broucke" could be instances of the class "Person". incorrect Objects are blueprints of classes. "Human", "Employee", "Sale" are examples of objects. correct