Software Quality Assurance Practice Exam

Usability testing primarily differs from other testing methods by directly involving end-users of the product during the testing process. This approach allows testers to gather firsthand feedback on user interactions with the product, which is essential for understanding how real users perceive and utilize the system.

Unlike other testing types that might focus on aspects like code efficiency, functionality, or performance, usability testing centers around the user's experience. This involves observing how easy and intuitive the product is for the intended audience, helping to identify areas for improvement based on actual user behavior and interactions.

The other options fall short in context. Focusing on code efficiency reflects more of a performance or software testing perspective rather than usability. Sole reliance on automated methods contradicts the fundamental obligation of usability testing to incorporate user feedback, as it typically requires human input to assess user-friendliness. Lastly, while usability testing can vary in cost depending on the scope and resources involved, it is not inherently less expensive than all other testing methods, as it may require significant investment in user recruitment and session facilitation.