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?

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:

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