Which approach best supports systematic compatibility testing?

• A. Test across a single device and OS.
• B. Test across devices, OS versions, browsers, and screen sizes; note inconsistencies and report.
• C. Rely solely on automated tests.
• D. Ignore platform differences.

Answer: (C)

Systematic compatibility testing relies on broad environmental coverage. You need to test across devices, OS versions, browsers, and screen sizes to mirror real user setups. This wide matrix helps reveal where behavior changes or UI elements break, so you can ensure a consistent experience. As you test, note any inconsistencies and report them so developers can reproduce and fix them across the environments you tested. Relying on a single device misses many issues, and automated tests alone often don’t capture all real-world scenarios or visual/layout differences. Ignoring platform differences creates a fragmented user experience. The strongest approach combines cross-environment testing with clear documentation of inconsistencies, enabling comprehensive fixes that work across the ecosystem.