While running DOS on a PC, which command should be used to duplicate an entire diskette sector-by-sector (including boot records and directory structure)?

Introduction / Context:
File-level copying differs from disk-level cloning. When you need an exact duplicate of a floppy disk—including boot sector, FAT, root directory, and all files—DOS provides a dedicated command to replicate the entire medium rather than just individual files.

Given Data / Assumptions:

• Source and destination are diskettes of the same capacity.
• Goal is a full, bootable, structural clone.
• Standard DOS command set is available.

Concept / Approach:
DISKCOPY performs a sector-by-sector copy from one diskette to another, duplicating low-level structures as well as file contents. COPY only transfers files at the filesystem level. CHKDSK checks a disk for errors; TYPE displays file contents. Therefore, DISKCOPY is the correct command for cloning an entire floppy disk.

Step-by-Step Solution:

Verification / Alternative check:
A successfully cloned disk created by DISKCOPY will preserve bootability and volume metadata, whereas a simple COPY of files will not replicate boot records or hidden system data.

Why Other Options Are Wrong:

• COPY: File-level only; does not duplicate low-level structures.
• CHKDSK: Diagnostic; no cloning function.
• TYPE: Displays a file; irrelevant to duplication.
• None of the above: Incorrect because DISKCOPY is appropriate.

Common Pitfalls:
Using COPY with wildcards and assuming the target becomes bootable; it will not without system transfer of boot code and hidden files.

Final Answer:
DISKCOPY