System Modeling: Full Review

This comprehensive review quiz covers all major topics in system modelling: system modeling concepts (model vs. representation, four perspectives), context models and activity diagrams, use case modeling and sequence diagrams, structural models (class diagrams, generalization, aggregation), behavioral models (data-driven and event-driven), state diagrams and superstates, and model-driven architecture (MDA, CIM/PIM/PSM, benefits and limitations)

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Views #: 212

Questions #: 15

Time: 10 minutes

Pass Score: 80.0%

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Model vs. Representation

1 pts

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Which statement correctly distinguishes a model of a system from a representation of a system?

A model is always graphical; a representation is always textual

A model maintains all information about the system; a representation deliberately omits detail

A model is produced by engineers; a representation is produced by stakeholders

A model deliberately simplifies and picks out only the most salient characteristics; a representation maintains all information about the entity being represented

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Four Modeling Perspectives

2 pts

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Please drag and drop the options to sort them

Sort the four modeling perspectives from the most external/environmental view to the most internal/behavioral view.

Structural perspective (class diagrams)

External perspective (context model)

Behavioral perspective (state diagrams, activity diagrams)

Interaction perspective (use cases, sequence diagrams)

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Context Models - What They Do and Don't Show

2 pts

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Which of the following statements about context models are correct? Select all that apply.

Context models show which external systems are in the environment of the system being specified

Context models show the precise nature of the relationships between the system and its environment (e.g., whether data is shared or consumed)

Context models are used to define system boundaries - what is and is not part of the system

Context models are normally used alongside process models to give a more complete picture

Context models always show internal system components and their interactions

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UML Activity Diagram Notation

1 pts

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The diagram below shows a simple UML activity diagram.

True or False: In this diagram, Activities B and C execute in sequence - B must finish before C can start.

True

False

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Use Case vs. Sequence Diagram Level of Detail

1 pts

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To complete the line match

Click on an item in the first group
Click on an item in the second group
To delete a match, double click on a line

Diagram Type

Use case diagram

Sequence diagram

Level of Detail

Shows specific objects/actors as lifelines, the sequence of messages between them with parameters and return values, activation boxes showing computation periods, and alternative interaction paths using alt boxes

Provides a high-level overview showing which actors interact with which system tasks (use cases), without specifying the sequence or content of messages

Match each diagram type to the level of detail it provides about system interactions.

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Class Diagram Reading

1 pts

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In a UML class diagram, what does a 1..* multiplicity annotation on one end of an association line mean?

There are between one and a fixed maximum number of objects involved

There is one or more (at least one, no upper limit) objects of that class involved in the association

There is exactly one object of that class involved in the association

There are zero or more objects of that class involved in the association

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Generalization Arrow Direction

1 pts

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In a UML generalization hierarchy, the open arrowhead (hollow triangle) points:

From subclass to superclass - pointing upward toward the more general class

Horizontally between sibling classes at the same level

From superclass to subclass - pointing downward toward the more specific class

In both directions - generalization uses bidirectional arrows

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Aggregation Diamond Placement

1 pts

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In a UML aggregation association, the diamond shape is placed next to which class, and what does it signify?

Next to the class with fewer instances; it signifies the minority class

Next to the part class; it signifies that the part is abstract

Next to the whole class; it signifies that the whole is composed of the parts

In the center of the association line; it signifies a many-to-many relationship

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Data-Driven vs. Event-Driven Behavioral Models

2 pts

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options

×A phone billing system that accepts call records, calculates costs, and generates bills

×A landline phone switching system that responds to 'handset activated', 'digits pressed', 'call connected' events

×A microwave oven controller that responds to door open/close, button presses, and timer expiry

×A payroll system that processes employee time records and generates pay slips

Data-Driven

Event-Driven

Classify each of the following systems according to whether it is primarily data-driven or event-driven.

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Superstates - Purpose

1 pts

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True or False: A superstate in a UML state diagram is used to hide complexity by encapsulating a number of separate sub-states, making the high-level diagram simpler while allowing the detail to be shown on a separate expanded diagram.

True

False

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Three MDA Model Types

2 pts

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Please drag and drop the options to sort them

Sort the three MDA model types in order from the most abstract (furthest from implementation) to the most concrete (closest to executable code).

Computation Independent Model (CIM)

Platform Specific Model (PSM)

Platform Independent Model (PIM)

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Why Not All Graphical Models Need to Be Rigidly Formal

1 pts

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True or False: When using graphical models to stimulate discussion among software engineers (as in agile modeling), the models must be completely rigorous and use the notation with absolute precision.

True

False

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Which of the following are correct? Select all that apply

3 pts

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A model is an abstract view of a system that deliberately ignores some system detail

Context models show how a system is positioned in its environment; activity diagrams can extend them to show business processes

Sequence diagrams are primarily used to show the static class structure of a system

Class diagrams are used to define the static structure of object classes and their associations

State diagrams are used to model a system's behavior in response to internal or external events

Model-driven engineering is an approach in which a system is represented as models that can be automatically transformed to executable code

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Which Diagram for Which Purpose?

3 pts

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To complete the line match

Click on an item in the first group
Click on an item in the second group
To delete a match, double click on a line

Modeling Need

Show which external systems surround the system being developed and how it connects to them

Show the high-level interactions between a user role and the system as a set of discrete tasks

Show the detailed sequence of messages between objects during a specific interaction

Show the class hierarchy with inherited attributes and operations

Show how a real-time system transitions between states in response to events

Diagram Type

Sequence diagram

Use case diagram

Context model (with «system» stereotypes)

State diagram

Class diagram with generalization arrows

Match each modeling need to the most appropriate UML diagram type.

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UML Has How Many Diagram Types?

1 pts

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The Unified Modeling Language (UML) includes how many different diagram types in total, and how many does a survey suggest are sufficient to represent the essentials of most systems?

13 total; 5 are sufficient for most systems

5 total; 3 are essential

10 total; 7 are essential

20 total; 10 are essential

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Undergraduate Professional

Model vs. Representation

Correct Answer

Explanation

Four Modeling Perspectives

Correct Answer

Explanation

Context Models - What They Do and Don't Show

Correct Answer

Explanation

UML Activity Diagram Notation

Correct Answer

Explanation

Use Case vs. Sequence Diagram Level of Detail

Diagram Type

Level of Detail

Correct Answer

Explanation

Class Diagram Reading

Correct Answer

Explanation

Generalization Arrow Direction

Correct Answer

Explanation

Aggregation Diamond Placement

Correct Answer

Explanation

Data-Driven vs. Event-Driven Behavioral Models

Correct Answer

Explanation

Superstates - Purpose

Correct Answer

Explanation

Three MDA Model Types

Correct Answer

Explanation

Why Not All Graphical Models Need to Be Rigidly Formal

Correct Answer

Explanation

Which of the following are correct? Select all that apply

Correct Answer

Explanation

Which Diagram for Which Purpose?

Modeling Need

Diagram Type

Correct Answer

Explanation

UML Has How Many Diagram Types?

Correct Answer

Explanation

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