COMPUTER SCIENCE AND ENGINEERING
SOFTWARE ENGINEERING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Specifies the functional decomposition of a system
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Comprises classes and objects
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Specifies who performs which tasks with a system that is going to be developed
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Models the time flow within a system
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Detailed explanation-1: -So what is a use case diagram? A UML use case diagram is the primary form of system/software requirements for a new software program underdeveloped. Use cases specify the expected behavior (what), and not the exact method of making it happen (how).
Detailed explanation-2: -Use-case diagrams illustrate and define the context and requirements of either an entire system or the important parts of the system. You can model a complex system with a single use-case diagram, or create many use-case diagrams to model the components of the system.
Detailed explanation-3: -A use case diagram is a way to summarize details of a system and the users within that system. It is generally shown as a graphic depiction of interactions among different elements in a system.
Detailed explanation-4: -UCDs have only 4 major elements: The actors that the system you are describing interacts with, the system itself, the use cases, or services, that the system knows how to perform, and the lines that represent relationships between these elements.
Detailed explanation-5: -Use cases are represented with a labeled oval shape. Stick figures represent actors in the process, and the actor’s participation in the system is modeled with a line between the actor and use case.