There are many functional and non functional requirements of a web search engine. The non functional requirements would be the design you see, while the functional requirement would be the search bar.

what are the functional requirements of a website

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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.

Non-functional requirements of a banking system are basically unnecessary requirements that are not reliant upon the functional requirements of the system. They typically include system performance, availability and security.