FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Functional requirements define what a product must do, what its features and functions are. Nonfunctional requirements describe the general properties of a system. They are also known as quality attributes.

Detailed explanation-2: -A functional requirement is a statement of how a system must behave. It defines what the system should do in order to meet the user’s needs or expectations. Functional requirements can be thought of as features that the user detects.

Detailed explanation-3: -“Any requirement which specifies what the system should do.” In other words, a functional requirement will describe a particular behavior of function of the system when certain conditions are met, for example: “Send email when a new customer signs up” or “Open a new account”.

Detailed explanation-4: -A requirement in software engineering is a feature of new software that someone either wants, needs or commands. It describes what the software does and any limitations it should have.

Detailed explanation-5: -The requirements, which are commonly considered, are classified into three categories, namely, functional requirements, non-functional requirements, and domain requirements. IEEE defines functional requirements as ‘a function that a system or component must be able to perform.