What is a backup?

What is a backup?

• A. Have a duplicate of files in case something goes wrong
• B. A single copy of the files
• C. A backup is unnecessary
• D. A backup is a program

Answer: (A)

Having a backup means making a duplicate of important files so you can restore them if something goes wrong. This protects you against data loss from accidents, hardware failure, viruses, or corrupted files, because you can recover from the extra copy rather than starting from scratch. A single copy isn’t enough protection because if that one copy is lost or damaged, there’s nothing to recover from. Saying a backup is unnecessary ignores real risks to data. And a backup isn’t a program itself—it's the copies of your data, though programs can help create and manage those copies. So keeping duplicate files in a separate location is the right idea to recover quickly when problems occur.

Having a backup means making a duplicate of important files so you can restore them if something goes wrong. This protects you against data loss from accidents, hardware failure, viruses, or corrupted files, because you can recover from the extra copy rather than starting from scratch.

A single copy isn’t enough protection because if that one copy is lost or damaged, there’s nothing to recover from. Saying a backup is unnecessary ignores real risks to data. And a backup isn’t a program itself—it's the copies of your data, though programs can help create and manage those copies. So keeping duplicate files in a separate location is the right idea to recover quickly when problems occur.