[: Appian Documentation - Testing and Validation, Functional Testing (D): Functional testing is a critical component of UAT as it verifies that the application's functionality works as expected from the end-user's perspective. This includes validating that all features, workflows, and business processes perform correctly according to the specified requirements. UAT is the final phase where end-users interact with the application to confirm that it meets their needs and performs as intended.Reference: Appian Documentation - Functional Testing, Note: Load testing (A) and platform security testing (B) are important types of tests but are usually conducted during performance and security testing phases rather than UAT. UAT focuses more on ensuring the application meets business requirements and end-user expectations., , , =================, ]