UML Activity Diagrams for System Behavior Modeling

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Questions and Answers

Which of the following best describes the primary purpose of an activity diagram in software modeling?

To model the flow of control and dependencies between activities within a system. (correct)
To define the static structure of classes and their relationships.
To outline the database schema and data storage mechanisms.
To depict the user interface layout and design.

In an activity diagram, what is the role of a 'fork node'?

To represent a decision point where the flow of activity diverges based on a condition.
To split a single flow of activity into multiple parallel or concurrent flows. (correct)
To merge multiple flows of activity into a single flow.
To indicate the termination point of an activity.

When creating an activity diagram, which of the following is a crucial initial step?

Writing the code for the core functionalities.
Designing the user interface layout.
Defining the database tables.
Identifying candidate use cases by examining business workflows. (correct)

In the context of activity diagrams, what does a 'merge node' signify?

The point where different parallel flows converge back into a single flow after a decision. (D) Signup and view all the answers

Which of the following is NOT a typical use of activity diagrams in software development?

Defining the class hierarchy and attributes of objects. (D) Signup and view all the answers

In an activity diagram for modifying a profile photo, a decision node is used to validate the uploaded photo. What happens after the system saves the new photo?

The system notifies the user of a successful update. (C) Signup and view all the answers

What is the purpose of 'swimlanes' in an activity diagram?

To assign activities to specific roles or departments responsible for their execution. (B) Signup and view all the answers

Consider an activity diagram modeling a login use case. What is the likely sequence of events after the 'Start' node?

User enters credentials, and the system validates them. (A) Signup and view all the answers

In an activity diagram for a train ticket machine, which of the following scenarios best describes the interaction between the traveler and the machine?

The traveler provides trip information, selects payment options, and receives a ticket after successful payment. (C) Signup and view all the answers

When modeling the 'Process Order' activity with an activity diagram, how are the filling and billing activities typically represented to show they occur concurrently?

Using parallel forks to indicate that the activities occur simultaneously. (A) Signup and view all the answers

In the 'University Enrollment' activity diagram, what signifies the registrar's decision-making process regarding the completeness of enrollment forms?

A decision node that leads to different paths based on whether the forms are properly filled. (A) Signup and view all the answers

What is the primary difference between an activity diagram and a swimlane diagram in the context of modeling a business process?

An activity diagram shows the flow of activities, while a swimlane diagram also specifies which actor or role is responsible for each activity. (A) Signup and view all the answers

During the train ticket purchase activity, if the commuter chooses to pay by credit card, which additional actor becomes involved according to the description?

The bank. (A) Signup and view all the answers

Considering the 'SmartBank' exercise, what would be the most crucial initial activity to depict when creating an activity diagram for a 'withdraw' use case?

Initiating the withdrawal request. (A) Signup and view all the answers

Which of the following is the MOST important reason for using use case diagrams in the early stages of a project?

To improve communication among stakeholders regarding high-level system functionality. (A) Signup and view all the answers

What is the purpose of the “Thank You” screen activity shown by the train ticket vending machine considered from a modeling perspective?

To signal the completion of the process and provide feedback to the commuter. (A) Signup and view all the answers

Flashcards

Activity Diagram

A diagram used to model workflows by identifying process steps and their conditions.

Activity Diagram Goal

Show dependencies and coordination between activities within a system.

Activity Diagram Uses

Modelling business processes, understanding concurrent system behavior, and clarifying dynamic system aspects.