Perry should conduct beta testing to identify subtle errors in the application's interface, as it involves real users testing the software in a real-world environment. Other testing methods like big-bang, top-down, acceptance, and non-functional testing are less effective for this purpose. Beta testing provides valuable feedback and improves the application's quality before release.
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The appropriate testing type for Perry to identify subtle errors in the application is beta testing , where real users test the software in real-world scenarios. This process helps uncover interface issues not detected during earlier testing stages. Other testing methods like big-bang, top-down, acceptance, and non-functional testing do not specifically target subtle interface errors. ;