220-1102 Question 290
Single answerPhysical media vs. mountable ISO fileA technician needs to reinstall Windows 11 on a user's laptop. The technician has downloaded the official Windows installation image as an ISO file to the laptop's current Windows desktop. The laptop does not have a DVD drive, and the technician wants to begin the installation without using external media. Which action should the technician take first to start the installation from the downloaded image?
- A
Burn the ISO to a DVD and boot from the disc
- B
Mount the ISO file in Windows and run Setup from the virtual drive
- C
Rename the ISO file to .exe and launch it directly
- D
Copy the ISO file to the desktop and restart the laptop
Show answer and explanation
Correct answer: B
Explanation
The key distinction is between physical installation media and a mountable ISO file. Physical media, such as a DVD or bootable USB drive, is used when booting a system externally or when the operating system is unavailable. A mountable ISO file, by contrast, can be opened directly within a working operating system and presented as a virtual disc drive. In modern Windows versions, ISO mounting is built in through File Explorer, and running Setup.exe from the mounted image is a common best practice for starting an installation or upgrade without burning disc media. Microsoft installation guidance for Windows supports both approaches, but the best method depends on the hardware available and whether the technician is initiating setup from within a running OS or booting from external media.
- A. Incorrect.
This is incorrect because the scenario specifically states that the laptop does not have a DVD drive and the technician wants to avoid external media. Burning the ISO to physical media is a valid installation method in some environments, but it does not fit the constraints of this situation.
- B. Correct.
This is correct. In Windows, an ISO can be mounted as a virtual optical drive, allowing the technician to access its contents without burning it to physical media. Running Setup from the mounted ISO is the appropriate first step when performing an in-place installation or starting the installation process from within the existing Windows environment.
- C. Incorrect.
This is incorrect because changing a file extension does not convert an ISO image into an executable program. An ISO is a disk image that must be mounted or written to bootable media before its contents can be used properly. This option reflects a misunderstanding of how file types work in Windows.
- D. Incorrect.
This is incorrect because simply storing the ISO on the desktop does not make it bootable or automatically start installation. The technician must either mount the ISO in the operating system or create bootable physical/removable media from it. Restarting alone will not cause the system to boot from or use an ISO file sitting in the file system.