Sequence diagrams in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the lifeline for the User actor in a sequence diagram.

LLD

[1] User

Drag options to blanks, or click blank then click option'

Aactor

Bentity

Cobject

Dparticipant

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'actor' instead of 'participant' causes syntax errors.

In sequence diagrams, participant is used to define lifelines for actors or objects.

2fill in blank

medium

Complete the code to show a message from Client to Server in a sequence diagram.

LLD

Client -> [1]: Request

Drag options to blanks, or click blank then click option'

ACache

BServer

CUser

DDatabase

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'Database' or 'Cache' instead of 'Server'.

The message is sent from Client to Server, so the arrow points to Server.

3fill in blank

hard

Fix the error in the return message syntax from Server to Client.

LLD

Server --> [1]: Response

Drag options to blanks, or click blank then click option'

ADatabase

BServer

CClient

DCache

Attempts:

3 left

💡 Hint

Common Mistakes

Pointing the return message to Server instead of Client.

The return message goes back to the Client, so the arrow points to Client.

4fill in blank

hard

Fill both blanks to show a synchronous call and its return in a sequence diagram.

LLD

Client -> [1]: ProcessData
[2] --> Client: Result

Drag options to blanks, or click blank then click option'

AServer

BClient

DDatabase

Attempts:

3 left

💡 Hint

Common Mistakes

Using Client as the receiver of the call or sender of the return.

The synchronous call goes from Client to Server, and the return message comes back from Server to Client.

5fill in blank

hard

Fill all three blanks to define lifelines and a message flow in a sequence diagram.

LLD

participant [1] as Client
participant [2] as Server
[3] -> Server: Authenticate

Drag options to blanks, or click blank then click option'

AUser

BClient

CServer

DDatabase

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing participant names or message sender names.

The lifeline names are Client and Server. The message is sent from Client to Server.