Quality assurance (QA) is the set of practices that make sure software meets requirements and works reliably for users. It covers how quality is built into the process as well as how products are tested before release.
Test automation is the use of software to run tests, compare results with expectations and report failures without manual effort. It lets teams check every change quickly and consistently.
User acceptance testing (UAT) is the final phase of testing, in which business users or clients check that software meets their needs in realistic scenarios. It comes before the software is approved for release.
The definition of done is a shared checklist of conditions every piece of work must meet before a team calls it complete. It makes "finished" mean the same thing for everyone.
A QA engineer makes sure software works as intended before and after release, designing test strategies, writing automated tests and finding defects. QA means quality assurance, and teams often hire one when escaped bugs start reaching customers.
The software development life cycle (SDLC) is the end-to-end process by which software is planned, designed, built, tested, released and maintained. Different models organise these stages in different ways.
Web accessibility is the practice of building websites and apps that people with disabilities can perceive, navigate and use. WCAG is the widely used standard that sets testable criteria for it.
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