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INTERVIEW QUESTION:

What is a use case diagram?

Posted by Chris Adams

Article Rating // 7334 Views // 9 Additional Answers & Comments

Categories: Business Analysis, Systems Analysis, Unified Modeling Language (UML), Use Cases

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ranjitnair posted on Monday, October 22, 2007 4:44 AM
Use case diagram is a modelling diagram which depicts how the client and other users of the system (like developer, administrator etc) will interact with the system.There are actors which are the users which interact with the system and the system contains of different use cases which does specefic process.
nithyawarrier posted on Thursday, November 22, 2007 11:03 PM
Interactions between system and actors is represented graphically using usecase diagram
Asha Paul posted on Wednesday, November 28, 2007 6:56 AM
A use case diagram is a type of behavioral diagram defined by the Unified Modeling Language (UML). Its purpose is to present a graphical overview of the functionality provided by a system in terms of actors, their goals—represented as use cases—and any dependencies between those use cases
Roohi Agarwal posted on Sunday, February 3, 2008 3:58 PM
Use Case is a textual description of interaction between the Actor and the system. It is used during the analysis phase of the project to identify and partition the system functionality.

Use case describes the behaviour of the system when the actor sends an input.

Use case usually emphasizes on on WHAT a system should not on HOW it shoul ddo it.
kr_BA posted on Tuesday, March 11, 2008 5:45 AM
A use case diagram is a modeling technique in UML, which depicts the system level functionality via
user-system dilogue exchange in graphical manner.

Also it is a first stage where requirement model is born
and will iterate towards the discovery of static and dynamic behaviour of the candidate system.
Shilpa posted on Thursday, March 12, 2009 9:29 AM
Use Case diagram is a modelling technique in UML.
It has four components:

1.System boundary
2.Use case
3. Actor
4.Association
rachel posted on Sunday, May 10, 2009 10:12 AM
A use case diagram aids in determining the scope of the system being designed via system boundary, the role or the system i.e Actor which interacts with the System being modeled,The Use cases which depict the functionality and the relationships between the use cases if any
LAMPEJO posted on Tuesday, October 25, 2011 7:26 AM
A Use case is the interaction between the initiating actor and the benefiting actor via the system. it also uses includes and extends for simplicity, clarity and unambiguity.
Neha posted on Thursday, August 25, 2016 5:20 AM
UML is an graphical representation of the users actions and system response. Through UML diagrams its always easy to understand the users action on the system. In spite of documenting use cases in 200 pages its always good to represent it with the diagrams which would be easy for the team to understand the use case well.
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