![Crack the Case System: How to Conquer Your Case Interviews: Ohrvall, David: 9780996779203: Amazon.com: Books Crack the Case System: How to Conquer Your Case Interviews: Ohrvall, David: 9780996779203: Amazon.com: Books](https://m.media-amazon.com/images/I/61SuiUHLVOL._AC_UF1000,1000_QL80_.jpg)
Crack the Case System: How to Conquer Your Case Interviews: Ohrvall, David: 9780996779203: Amazon.com: Books
![Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors). Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors).](https://www.uml-diagrams.org/use-case-diagrams/business-use-case-diagram-elements.png)
Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors).
![Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors). Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors).](https://www.uml-diagrams.org/use-case-diagrams/use-case-diagram-elements.png)