MC	Which statement is CORRECT?	All relationships in ODMG's ODL should be defined in a bidirectional way. 	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	GUI objects are an example of objects that should be stored persistently.	incorrect	Each literal is defined by an OID according to the ODMG standard.	incorrect	
MC	Which statement is CORRECT?	Two objects with the same values always have the same OID.	incorrect	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	Each literal is defined by an OID according to the ODMG standard.	incorrect	
MC	Which statement is CORRECT?	Many-to-many relationships cannot be expressed using ODL.	incorrect	Unary, binary and ternary relationships are supported in ODL. 	incorrect	The extent of a class is the set of all current instances.  	correct	ODL is only optimized for Java objects.	incorrect	
MC	What is NOT an advantage of OODBMSs?	They allow to store objects and relationships in a transparent way.	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 solve the impedance mismatch problem by using the same data model as the programming language.	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 implies that the methods of a class are not accessible to the other classes. 	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	
MC	Which statement is CORRECT?	Persistence by inheritance indicates that the persistence capabilities are inherited from a pre-defined persistent class.  	correct	In inheritance, a subclass only inherits the variables of its superclass.	incorrect	OODBMSs implement the three-layer architecture in a transparent way. 	incorrect	Persistence by class allows for flexibility since it allows a class to have transient objects.	incorrect	
MC	Which statement is NOT CORRECT?	Join queries are not supported in OQL.	correct	OQL is a declarative, non-procedural query language.	incorrect	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	Which statement is NOT CORRECT?	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	Encapsulation refers to storing a value in a variable, and never changing it again. This way its value is safe forever.	incorrect	
MC	Which statement is NOT CORRECT?	Dynamic binding allows for polymorphism.	incorrect	OQL can be used for both navigational (procedural) as well as associative (declarative) access.	incorrect	An object contains the blueprint description of all its characteristics.	correct	All relationships in ODMG's ODL should be defined in a bidirectional way. 	incorrect	
MC	Which statement is NOT CORRECT?	Encapsulation implies that the methods of a class are not accessible to the other classes. 	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 refers to storing a value variable, and making it impossible to retrieve it.	incorrect	Encapsulation refers to storing a value in a variable, and never changing it again. This way its value is safe forever.	incorrect