What occurs during system functional testing?

During system functional testing, the primary objective is to verify that the various components of a system operate together effectively and as intended. This process involves assessing the interactions between different system parts to ensure they work harmoniously and meet the specified operational requirements.

Functional testing goes beyond checking individual units; it focuses on the overall system performance, which includes both hardware and software components. This thorough validation aims to uncover any integration issues, ensuring that the system behaves as expected in a real-world scenario.

The other options do not accurately reflect the purpose of system functional testing. Checking only mechanical parts, bypassing electrical components, or focusing solely on power supplies would not provide a comprehensive understanding of how the entire system functions as a cohesive unit.