MC	Which statement is NOT CORRECT?	Objects are blueprints of classes. "Human", "Employee", "Sale" are examples of objects.	correct	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	A class can be instantiated into several objects.  	incorrect	
MC	Which statement is NOT CORRECT?	Encapsulation refers to storing a value in a variable, and never changing it again. This way its value is safe forever.	incorrect	Encapsulation refers to storing a value variable, and making it impossible to retrieve it.	incorrect	Encapsulation refers to controlling the way a variable is accessed by forcing users to use getter/setter methods that prevent misuse of the variable.	correct	Encapsulation implies that the methods of a class are not accessible to the other classes. 	incorrect	
MC	In Java, what is method overloading?	Putting so much code in a method that its functionality becomes hard to understand.	incorrect	Using two methods with the same name, but a different number (and/or different type) of arguments.	correct	Offering the user of your class all possible methods that he/she would like to perform on the variables the class offers.	incorrect	Making sure that every method uses all variables of the class.  	incorrect	
MC	Which statement is CORRECT?	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	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	Different subclasses of a parent class can all have different implementations of methods with the same name, number of parameters and parameter types. 	correct	Static binding occurs at run-time whereas dynamic binding occurs at compile-time.	incorrect	
MC	Objects should be made persistent when...	you need them over multiple program executions.	correct	you only need them during 1 program execution, and then never again.	incorrect	
MC	Which statement is NOT CORRECT?	Persistence by marking implies that all objects will be created as persistent.  An object can then be marked as transient at compile-time.	correct	Persistence by class implies that all objects of a particular class will be made persistent.	incorrect	Persistence by creation is achieved by extending the syntax for creating objects to indicate at compile-time that an object should be made persistent.	incorrect	Persistence by inheritance indicates that the persistence capabilities are inherited from a pre-defined persistent class.  	incorrect	
MC	Which statement is CORRECT?	The OID of an object remains the same during the entire lifetime of the object.	correct	An OID is the same as a primary key in a relational database setting.	incorrect	Two objects with the same values always have the same OID.	incorrect	Each literal is defined by an OID according to the ODMG standard.	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	Which statement is NOT CORRECT?	OQL is a declarative, non-procedural query language.	incorrect	Join queries are not supported in OQL.	correct	OQL can be used for both navigational (procedural) as well as associative (declarative) access.	incorrect	The OQL language provides no explicit support for INSERT, UPDATE, and DELETE operations.  	incorrect	
MC	What is NOT an advantage of OODBMSs?	They allow to store objects and relationships in a transparent way.	incorrect	They solve the impedance mismatch problem by using the same data model as the programming language.	incorrect	Scalability and fault-tolerance of OODBMSs is far better than that of their relational counterparts.	correct	The identity based approach allows for improved performance when performing complex queries involving multiple interrelated objects, avoiding expensive joins. 	incorrect