Quiz 7

Question 1

An SD describes

Answer 1

Only the interactions between objects; it does not describe what happens inside of an object.

Question 2

When an object A creates another object B ___

Answer 2

A create dependency exists between A and B

Question 3

What does a dependency relationship represent?

Answer 3

A transient relationship between class objects

Question 4

If an object of class A is passed in as a parameter to a method defined in class B

Answer 4

A dependency exists between A and B

Question 5

What does a lifeline in an SD represent?

Answer 5

An instance of a class

Question 6

What does an alt fragment represent?

Answer 6

Alternative interactions

Question 7

What does a par fragment represent?

Answer 7

Groups of interactions that can occur in parallel

Question 8

What does an opt fragment represent?

Answer 8

A conditional interaction

Question 9

Association

Answer 9

• Link between objects
• Have at least two ends
• Must have multiplicities at each end
• Must have either a name or role names at the ends

Question 10

What does an object have to do if it sends a synchronous message?

Answer 10

Wait for a response

Question 11

Subsystem Design

Answer 11

• describes the internal detail of a design
• can commence after the subsystem interfaces are defines
• describes how a subsystem discharges its responsibilities
• can consist of class diagrams and interaction diagrams that describe the inner workings of the subsystem

Question 12

What type of modeling are interaction diagrams used for?

Answer 12

Dynamic

Question 13

What is illustrated in UML Class diagrams?

Answer 13

Classes, interfaces, dependencies, associations

Question 14

Types of interaction diagrams

Answer 14

Sequence diagram and communication diagram

Question 15

Communication diagrams work well for:

Answer 15

• UML as a sketch
• Formal modeling
• the agile modeling environment

Question 16

UML Stereotypes

Answer 16

• destroy and create are examples of stereotypes
• a stereotype represents a refinement of an existing modeling concept
• a stereotype is defined within a UML profile
• Object Management Group (OMG) provides many pre-defined stereotypes

Question 17

How do we describe strong composition

Answer 17

Aggregation, a solid diamond arrow

Question 18

UML’s formal specification language for constraints

Answer 18

Object Constraint Language (OCL)

Question 19

Visibility

Answer 19

The ability of one object to have a reference to another object

Question 20

Gang-of-Four (GoF)

Answer 20

• Erich Gamma
• Richard Helm
• Ralph Johnson
• John Vlissides

Question 21

GRASP

Answer 21

A methodology for OOD based on responsibility-driven design. Consists of a collection of design patterns

Question 22

What patterns can be applied to minimize the impact of changes to the system?

Answer 22

High cohesion, low coupling

Question 23

Two types of Controllers

Answer 23

Session Controller and Facade Controller