MC	Which statement is CORRECT?	Information hiding (also referred to as encapsulation) states that the variables of an object can only be accessed through either getter or setter methods. 	correct	UML supports variables with unique values.	incorrect	3 binary relationship types between 3 entity types can always be replaced by 1 ternary relationship type between the 3 participating entity types.	incorrect	A composite aggregation has a maximum multiplicity of n and a minimum multiplicity of 0 at the composite side.	incorrect	
MC	A composite aggregation...	has a maximum multiplicity of n and a minimum multiplicity of 0 or 1 at the composite side. 	incorrect	has a maximum multiplicity of 1 and a minimum multiplicity of 0 or 1 at the composite side. 	correct	has a maximum multiplicity of 1 and a minimum multiplicity of 1 at the composite side. 	incorrect	has a maximum multiplicity of n and a minimum multiplicity of 0 at the composite side. 	incorrect	
MC	Which statement is CORRECT?	An existence dependent entity type always participates in a 1:1 relationship type.	incorrect	An existence dependent entity type is always a weak entity type.	incorrect	A weak entity type is always existence dependent.	correct	A weak entity type can only have one attribute type.	incorrect	
MC	Given the following EER categorisation:<br><br><img class="img-fluid" src="http://www.pdbmbook.com/static/quiz/fig3_7.png"><br><br>Which statement is CORRECT?	A patient only inherits the 'Name' and 'Date of Birth' attribute types from the superclass that the current entity belongs to.	correct	All men and women are patients.	incorrect	The categorisation can also be represented as an aggregation.	incorrect	The categorisation can also be represented as a specialisation.	incorrect	
MC	Which statement is CORRECT?	An association is an instance of a link.  	incorrect	Qualified associations can be used to represent weak entity types.	correct	Only binary associations are supported in the UML class diagram.	incorrect	An association is always bidirectional.  	incorrect	
MC	<img class="img-fluid" src="http://www.pdbmbook.com/static/quiz/fig3_2.png"><br><br>In the movie ER model above, we focus on the binary relationship 'PRODUCES'.  Suppose we add an attribute type that indicates the time that each producer spent on producing each movie called 'WORKING HOURS'. <br><br>Which of the following scenarios is possible?	We can migrate the attribute type 'WORKING HOURS' to the 'MOVIE' entity type.	incorrect	We can add the attribute type 'WORKING HOURS' to the relationship type PRODUCES.	correct	We can migrate the attribute type 'WORKING HOURS' to the 'PRODUCER' entity type.	incorrect	We can migrate the attribute type 'WORKING HOURS' to either one of the linked entity types.	incorrect	
MC	Which variables types are not directly supported in UML?	Multivalued variables	incorrect	Derived variables	incorrect	Variables with unique values (similar to key attribute types in the ER model)	correct	Composite variables	incorrect	
MC	Which statement is NOT CORRECT?	The changeability property specifies the type of operations which are allowed on either variable values or links.  	incorrect	In UML, dependency defines a 'using' relationship which states that a change in the specification of a UML modeling concept may affect another modeling concept that uses it.  	incorrect	OCL constraints are defined in a procedural way.	correct	OCL constraints can be used for various purposes such as, to specify invariants for classes, to specify pre- and post-conditions for methods, to navigate between classes, or to define constraints on operations.  	incorrect	
MC	Given the following ER model:<br><img class="img-fluid" src="http://www.pdbmbook.com/static/quiz/fig3_5.png"><br><br>Which statement is NOT CORRECT?	According to the ER model, a supplier cannot have more than 1 address.	incorrect	According to the ER model, there can be suppliers that supply no products and have no purchase orders outstanding.	incorrect	The ER model does not enforce that a supplier can only have purchase orders outstanding for products he/she can actually supply.  	incorrect	The ER model has both weak and existence dependent entity types.  	correct	
MC	<img class="img-fluid" src="http://www.pdbmbook.com/static/quiz/fig3_2.png"><br><br>In the movie ER model above, we focus on the binary relationship 'PRODUCES'.  Suppose we add an attribute type that indicates the time that each producer spent on producing each movie called 'WORKING HOURS'. <br><br>Which of the following scenarios is possible?	We can migrate the attribute type 'WORKING HOURS' to either one of the linked entity types.	incorrect	We can migrate the attribute type 'WORKING HOURS' to the 'MOVIE' entity type.	incorrect	We can add the attribute type 'WORKING HOURS' to the relationship type PRODUCES.	correct	We can migrate the attribute type 'WORKING HOURS' to the 'PRODUCER' entity type.	incorrect