If you encounter an error after the POST beep sounds, but before the operating system’s user interface loads, which of the following is likely to the issue? Choose all that apply.

A.
A mismatch between installed hardware and the CMOS configuration settings.

B.
A missing or corrupt missing boot file.

C.
A mismatch between an application program’s configuration parameters and the system’s hardware configuration.

D.
A boot drive issue

E.
A missing or corrupt operating system file.

Explanation:
When you encounter an error after the POST beep sounds, and the operating system’s user interface fails to load, you have an issue with your software. This can be attributed to a missing or corrupt boot file, a boot drive issue, or a missing or corrupt operating system file.
Incorrect Answers:

A, C: You have a configuration error when there is a mismatch between installed hardware and the CMOS configuration settings, and a mismatch between an application program’s configuration parameters and the system’s hardware configuration. These errors are encountered before the POST beep sounds.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 494-497.