Sequence diagrams in Software Engineering - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to name the main components of a sequence diagram.

Software Engineering

A sequence diagram shows interactions between [1] over time.

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Aobjects

Bdatabases

Cfiles

Dnetworks

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing objects with databases or files.

Thinking sequence diagrams show physical networks.

Sequence diagrams illustrate how objects interact with each other in a time sequence.

2fill in blank

medium

Complete the code to identify the element that represents the time progression in a sequence diagram.

Software Engineering

The vertical dashed line in a sequence diagram is called a [1] and shows the object's lifetime.

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Amessage

Bactivation box

Carrow

Dlifeline

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing lifeline with message arrows.

Thinking activation box is the vertical dashed line.

The lifeline is a vertical dashed line that represents the existence of an object over time.

3fill in blank

hard

Fix the error in the description of message arrows in a sequence diagram.

Software Engineering

A solid arrow with a filled arrowhead represents a [1] message, which is synchronous.

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Asynchronous

Basynchronous

Creturn

Dcreation

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing synchronous and asynchronous message symbols.

Confusing return messages with synchronous calls.

A synchronous message is shown with a solid arrow and filled arrowhead, indicating the sender waits for a response.

4fill in blank

hard

Fill both blanks to complete the description of activation boxes and return messages.

Software Engineering

The [1] box shows when an object is active, and a [2] message is shown with a dashed arrow.

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Aactivation

Bcreation

Creturn

Dcall

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing activation boxes with creation boxes.

Using solid arrows for return messages.

The activation box indicates when an object is performing an action. A return message is shown with a dashed arrow to indicate a response.

5fill in blank

hard

Fill all three blanks to complete the code for a simple sequence diagram fragment.

Software Engineering

object1 -> object2: [1]
object2 [2] [3]

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AcallMethod()

B-->

Cactivation box

Dreturn

Attempts:

3 left

💡 Hint

Common Mistakes

Using solid arrows for return messages.

Placing activation box in place of message names.

The first line shows a message callMethod() sent from object1 to object2. The second line shows a return message with a dashed arrow --> back to object1.