Which of the following installation types would require the use of an answer file to install the OS?
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A. B. C. D.A.
The correct answer is A. Unattended.
An answer file, also known as an unattended installation file, is a configuration file used during an unattended installation of an operating system (OS). An unattended installation is a method of installing an OS without requiring user interaction during the installation process.
Answer B, a clean installation, does not require an answer file. A clean installation is a method of installing an OS on a new or reformatted hard drive, where the previous OS and data have been erased.
Answer C, a repair installation, does not typically require an answer file. A repair installation is a method of fixing problems with an existing OS installation by replacing damaged or missing system files.
Answer D, an upgrade installation, does not typically require an answer file. An upgrade installation is a method of installing a newer version of an OS on top of an existing installation of an older version of the same OS.
In summary, the installation type that would require the use of an answer file to install the OS is an unattended installation (Answer A).