Which type of testing focuses on the system's performance and scalability?

Performance Testing is specifically designed to evaluate how a system performs under various conditions. This type of testing focuses on key aspects such as responsiveness, speed, reliability, and scalability of the system. By simulating multiple users or high transaction loads, Performance Testing aims to determine how the application behaves when subjected to stress or varying operational conditions.

It allows teams to identify bottlenecks, assess the limits of the system, and ensure it can handle expected and peak loads effectively. Understanding performance characteristics is crucial for user satisfaction and maintaining a good user experience, especially as the application scales.

In contrast, Unit Testing, Integration Testing, and Acceptance Testing serve different purposes: Unit Testing examines individual components for correctness, Integration Testing checks the interaction between integrated components, and Acceptance Testing verifies that the system meets business requirements from an end-user perspective.