ISTQB Agile Tester 2025 – 400 Free Practice Questions to Pass the Exam

The primary focus of functional testing is to verify that the software behaves according to the specified requirements and functions as intended. It involves checking the application's features and functionalities against the defined specifications or use cases. This type of testing ensures that each function of the software operates in conformance with the requirements outlined for it, confirming that all features work correctly in various scenarios.

In contrast, performance analysis is oriented towards evaluating how the system performs under various conditions, such as load and stress tests. User experience focuses on how satisfying and intuitive the application is for its users, which is more qualitative in nature. Security vulnerabilities pertain to identifying weaknesses in the software that could be exploited, which is a specialized area that often overlaps with functional testing but does not encompass its primary purpose. By ensuring that the software meets its specifications through functional testing, developers can provide a reliable and effective product to users.