In classic MS-DOS maintenance, which single command will both format a floppy disk in drive A: and transfer the DOS system files so that the disk becomes bootable?
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AFORMAT A: /S
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BSYS A:
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CSYS C: A:
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DFORMAT A: /T
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ENone of the above
Answer
Correct Answer: FORMAT A: /S
Explanation
Introduction / Context:Technicians working with legacy PCs and MS-DOS often need to create a bootable floppy disk for recovery or installation tasks. There are two related capabilities: formatting the media at the filesystem level and transferring the DOS system files plus a proper boot sector. This question tests whether you know the exact command that performs both operations in one step.
Given Data / Assumptions:
- The target is a floppy disk in drive A: that may be blank or previously used.
- The PC is already booted into a working DOS environment.
- You want the result to be bootable with core system files present.
Concept / Approach:MS-DOS offers two primary tools here. The FORMAT command creates a new filesystem on the disk and, with the correct switch, can also transfer system files and write a boot sector. The SYS command copies system files and updates the boot sector on an already formatted disk, but it does not perform a format. Therefore, if you need to accomplish both tasks in a single action, you choose FORMAT with the system switch.
Step-by-Step Solution:
Step 1: Insert a floppy into A: and ensure it is not write-protected.Step 2: Run the command: FORMAT A: /SStep 3: Allow DOS to complete low-level verification, create the filesystem, and copy system files (for example, IO.SYS, MSDOS.SYS, COMMAND.COM depending on version).Step 4: Label the disk if prompted and verify the completion message that indicates a system transfer.Verification / Alternative check:Boot the computer from the floppy. If the format and system transfer were successful, the machine reaches the DOS prompt from drive A:. Alternatively, list the disk contents to confirm that the expected system files are present and hidden attributes are set appropriately.
Why Other Options Are Wrong:
- SYS A:: Transfers system files and writes a boot sector but does not format the disk.
- SYS C: A:: Syntax varies by DOS version; SYS is not a formatter.
- FORMAT A: /T: The /T switch relates to tracks; it does not copy system files.
- None of the above: Incorrect because FORMAT A: /S performs both tasks together.
Common Pitfalls:Assuming SYS will also format, forgetting that hidden/system files may not show with a simple DIR, and using the wrong DOS version or incorrect switches that do not exist on that particular release.
Final Answer:FORMAT A: /S