Answer:
Functional & Nonfunctional Requirements
• Functional Requirements: Actions that a system must be able to perform without taking physical constraints into considerations.
• Nonfunctional Requirements: Describe the required attribute of the system (performance, security, etc.).
With Use Case
• Use cases place the functional requirements into the context of a user.
• Use case can also be used to capture any nonfunctional requirements that are specific to the use cases.
Misconceptions related to Use Cases
• Use cases are nothing else than capturing functional requirements.
• Nonfunctional requirements are captured apart from the use cases.