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Use Case Diagram for LinkedIn

Explore the design of LinkedIn’s use case diagram by identifying primary and secondary actors, defining key user interactions and system notifications. Learn how to represent relationships such as generalization, associations, and extensions in UML diagrams, preparing you for object-oriented design interviews focused on real-world applications.

Let’s build LinkedIn’s use case diagram and understand the relationship between its different components. First, we’ll define the different elements of our LinkedIn system, followed by the complete use case diagram.

System

Our system is LinkedIn.

Actors

Now, we’ll define the main actors of LinkedIn.

Primary actors

  • User: This actor can create a profile including their ...