Use Case Diagram for Stack Overflow

Let’s build the use case diagram of Stack Overflow and understand the relationship between its different components.

First, we’ll define the different elements of our Stack Overflow system, followed by the complete use case diagram of the system.

System

Our system is "Stack Overflow."

Actors

Now, we’ll define the main actors of Stack Overflow.

Primary actors

• User: This actor can create, answer, and flag questions. This actor can add bounty, tags, and comments to questions, and vote to close or delete questions or answers.

Secondary actors

• Guest: The guest can only search and view questions and their answers but needs to register an account to ask and answer questions.

• Admin: The admin is in charge of performing numerous operations, such as blocking or unblocking users.

• Moderator: The moderator is in ...