Can you explain the difference between functional and non-functional requirements?

In a recent college project, I worked on developing a mobile application for our university. The functional requirements were clear: the app had to allow students to check their grades, register for classes, and access course materials. Each of these features was critical to the app's purpose. However, we also had to consider non-functional requirements, such as ensuring the app was user-friendly and could handle a certain number of users simultaneously without crashing. We conducted user testing to gather feedback on the app's usability, and we optimized the backend to ensure it could manage peak traffic during registration times. This experience taught me the importance of balancing both functional and non-functional requirements to create a successful product.

During my time volunteering at a local nonprofit, I helped design a website to promote our events. The functional requirements included features like an event calendar, donation buttons, and a contact form. However, I quickly learned about non-functional requirements, such as the need for the website to load quickly and be accessible on mobile devices. To achieve this, I researched best practices for web design and utilized tools that ensured our site was responsive. Gathering feedback from users helped us refine the site further, emphasizing that both functional and non-functional aspects are essential to meet the needs of our audience effectively.

In my first job as a junior software developer, I was involved in a project to enhance an existing application. I quickly recognized the difference between functional and non-functional requirements. For instance, one of the core functional requirements was to implement a search feature that allowed users to find products quickly. However, I also had to address non-functional requirements like system performance, ensuring that search results appeared within two seconds. By working closely with the QA team, we established performance benchmarks and conducted load testing, which was pivotal in delivering a robust application that satisfied both user needs and performance expectations.