What is the system requirement and how are systems requirements classified?

System requirements are the specifications that outline the necessary attributes and functions of a system to meet user needs and expectations. They are typically classified into two main categories: functional requirements, which describe what the system should do (features and capabilities), and non-functional requirements, which define how the system performs those functions (such as performance, security, and usability). Additionally, requirements can be categorized as business, stakeholder, or technical requirements, depending on their focus and intended audience.