Software Quality Assurance Practice Exam

Which layer of an internet application contains the data used by the application?

1. Browser

2. Data

3. Business

4. Presentation

The correct answer is: Data

The data layer of an internet application is crucial because it encapsulates the management and storage of the application's data. This layer is responsible for interacting with databases to retrieve and manipulate the data needed by the application. The data layer typically includes database management systems, data storage mechanisms, and data access logic, ensuring that the application efficiently and securely stores and retrieves the information it requires. In contrast, the browser serves primarily as the user interface to interact with the application but does not contain the application's core data. The business layer focuses on the logic and rules that dictate how the application operates and processes data, while the presentation layer handles the visual aspects and user interface, facilitating user interactions. Each of these layers has its distinct role, but the data layer specifically and directly contains the data utilized by the application.