7. Which of the following UML diagrams is/are use to develop models of behavioral aspects (or dynamic representation) of software systems? (a) Use Case diagram (b) State machine diagram (c) Class diagram (d) Some of the above (e) All of the above 18. Assuming you are to develop an association for Pizza and its Slices. What type of association will be most accurate for the design? (a) one-to-many (unidirectional association) (b) one-to-many (bi-directional association) (c) one-to-many (reflexive association) (d) one-to-many (composition) (e) one-to-many (aggregation) 19. Assuming you are to develop a model for a Computer Folders' structure. Within a folder, there may be any number of folders. What type of association will be most accurate for the design? (a) Unidirectional association (b) Bi-directional association (c) Reflexive association (d) Composition (e) Aggregation 20. Which of the following is NOT true about OCL (Object Constraint Language)? (a) Can specify constraint on constructor of a class (b) Can specify invariants on a class (c) Can specify pre- and post-conditions on an operation (d) None of the above (e) All of the above