MC	Which statement is NOT CORRECT?	Join queries are not supported in OQL.	correct	Objects are instances of classes. The people "Bart Baesens", "Wilfried Lemahieu" and "Seppe vanden Broucke" could be instances of the class "Person".	incorrect	OODBMSs solve the impedance mismatch problem by using the same data model as the programming language.	incorrect	Dynamic binding is also called virtual method invocation.	incorrect	
MC	Which statement is CORRECT?	Each literal is defined by an OID according to the ODMG standard.	incorrect	Two objects with the same values always have the same OID.	incorrect	An OID is the same as a primary key in a relational database setting.	incorrect	The OID of an object remains the same during the entire lifetime of the object.	correct	
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	Scalability and fault-tolerance of OODBMSs is far better than that of their relational counterparts.	correct	They allow to store objects and relationships in a transparent way.	incorrect	
MC	In Java, what is method overloading?	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	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	
MC	What is NOT an advantage of OODBMSs?	The identity based approach allows for improved performance when performing complex queries involving multiple interrelated objects, avoiding expensive joins. 	incorrect	Scalability and fault-tolerance of OODBMSs is far better than that of their relational counterparts.	correct	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	
MC	Which statement is NOT CORRECT?	All relationships in ODMG's ODL should be defined in a bidirectional way. 	incorrect	A class can be instantiated into several objects.  	incorrect	Persistence by marking implies that all objects will be created as persistent.  An object can then be marked as transient at compile-time.	correct	Dynamic binding is also called virtual method invocation.	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	In Java, what is method overloading?	Putting so much code in a method that its functionality becomes hard to understand.	incorrect	Making sure that every method uses all variables of the class.  	incorrect	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	
MC	Which statement is NOT CORRECT?	OQL is a declarative, non-procedural query language.	incorrect	Static binding binds a method to its implementation at compile time.	incorrect	Joins are not supported in OQL.	correct	Persistence by reachability allows you to declare a persistent, root object. All objects referred to by the root object (either directly or indirectly) will then also be made persistent.	incorrect	
MC	Which statement is NOT CORRECT?	Objects are blueprints of classes. "Human", "Employee", "Sale" are examples of objects.	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