Description: In-line testing refers to tests that occur during the normal operation of software. This approach allows for continuous evaluation of software quality while it is in use, facilitating early detection of errors and performance issues. Unlike traditional testing, which is usually conducted in controlled environments separate from the production environment, in-line testing is integrated directly into the software lifecycle. This means developers can receive instant feedback on the software’s behavior in real-time, allowing them to make adjustments and improvements more swiftly. In-line testing is particularly relevant in the context of software applications, where users constantly interact with the software. This approach not only enhances the user experience by ensuring smoother operation but also optimizes the development process by reducing the time and resources needed to identify and fix faults. In summary, in-line testing is an essential practice in modern software development, promoting a culture of continuous quality and adaptability in an ever-evolving technological landscape.