What is a common outcome of a functionality test?

Functionality testing is primarily focused on ensuring that a software application behaves as expected and meets specified requirements. This type of testing evaluates whether the features and functionalities of the application operate correctly and perform their intended functions. Therefore, a common outcome of a functionality test is the verification that all required features work as intended.

The other choices relate to different aspects of software testing. Improved user interface design is more closely associated with usability testing, which focuses on the user's experience and interaction with the application. Identification of security flaws is often the focus of security testing, which aims to uncover vulnerabilities that could be exploited. Lastly, assessment of system load capacity pertains to performance testing, where the goal is to determine how well the system performs under varying levels of demand.