SYSTEM AND DESIGN CHAPTER 7

19. A behavioral state machine is a dynamic model that shows the different state through which a single _____ passes through its life in response to events, along with its responses and actions a. object b. actor c. use case d. sequence diagram e. communication diagram

Ans: a

6. A(n) _____ describes information about an object. a. attribute b. behavior c. operation d. message e. instance

Ans: a Response: See page 240

13. On a sequence diagram, an object name of Students:List would indicate that _____. a. Students is an instance of the List class that contains individual student objects b. List is an instance of the Students class c. List is a method of the Students class d. the Students and Lists objects are combined for that step in the sequence diagram e. a message is being passed from the Students class to the List class

Ans: a Response: See page 242

16. The first step in building a sequence diagram is to _____. a. set the context b. identify which objects will participate c. set the lifeline for each object d. add the focus of control to each object's lifeline e. validate the sequence diagram

Ans: a Response: See page 243

18. The acronym CRUD stands for _____. a. create, read, update, delete b. create, reference, underline, delete c. create, re-do, underline, delete d. collaborate, read, update, delete e. collaborate, reference, update, discard

Ans: a Response: See page 256

1. The external behavior of a system is described by _____. a. functional models b. structural models c. behavioral models d. interaction diagrams e. statechart diagrams

Ans: a Response: See pages 238-

8. Analysts use _____ to show the objects that participate in a use case and the messages that pass between the objects over time for one particular use case. a. structural models b. sequence diagrams c. collaboration diagram d. class diagrams e. behavioral state machines

Ans: b Response: See page 240

11. A systems analyst draws a lifeline with an X at the end. This lifeline represents _____. a. a message that cannot be delivered b. an object that is destroyed at a point in time c. a message that is delivered at that point in time d. an object that is complete at that point in time e. an object that arrives at its final destination

Ans: b Response: See page 241

2. An analyst depicts the static view of an information system with _____. a. use-case models b. structural models c. behavioral models d. interaction diagrams e. statechart diagrams

Ans: b Response: See pages 238-

3. The two types of interaction diagrams are ______________ diagrams. a. use-case and sequence b. class and sequence c. sequence and communication d. object and communication e. statechart and object

Ans: c Response: See page 239

7. _____ are information that is sent to objects to tell it to execute one of its behaviors. a. attributes b. operations c. messages d. instances e. use-cases

Ans: c Response: See page 240

15. When an object sends a message to itself in a sequence diagram, that is referred to as _____. a. recursive-messaging b. self-messaging c. self-delegation d. recursive-delegation e. none of the above

Ans: c Response: See page 243

17. In a communication diagram, a(n) _____ between actors and objects is shown with an undirected line. a. procedure calls b. data flow c. association d. message e. relationship

Ans: c Response: See page 248

4. The modeling focus of the interaction diagram is at the _____ level while the modeling focus on the class diagram is at the _____ level. a. class, object b. interaction, class c. class, interaction d. object, class e. high, low

Ans: d Response: See page 240

9. When arranging actors and objects on a sequence diagram, it is nice to list them _____. a. in alphabetical order down the side of the diagram b. in alphabetical order across the top of the diagram c. in order in which they participate in the sequence down the side of the diagram d. in order in which they participate in the sequence across the top of the diagram e. actors and objects are not both shown on a sequence diagram

Ans: d Response: See page 241

14. The order of messages on a sequence diagram goes from ____ to _____. a. right to left b. bottom to top c. left to right d. top to bottom e. left to right, top to bottom

Ans: d Response: See page 243

5. A(n) _____ is an instantiation of a class. a. attribute b. behavior c. operation d. message e. object

Ans: e Response: See page 240

10. Which of the following objects would be most likely to be destroyed at some point in time in a sequence diagram? a. customer b. order c. order item d. invoice e. shopping cart

Ans: e Response: See page 241

12. The focus in a sequence diagram is on __________________ a. How actors interact with objects to realize a given use case b. Messages sent by actors to other objects c. when an object is being created d. when messages are being destroyed e. time ordering of messages being passed between objects

Ans: e Response: See page 246