Which backup type is immediately usable after a disaster?

Which backup type is immediately usable after a disaster?

• A. Warm backup.
• B. Cold backup.
• C. Incremental backup.
• D. Hot backup.

Answer: (D)

When you’re recovering from a disaster, how quickly you can get service back depends on how the backup was taken. A hot backup is created while the system is running and is designed to be immediately usable, often supporting rapid failover or quick restoration with little or no downtime. That makes it the fastest option to get back online without a long wait. A warm backup is ready to go but typically requires some steps to bring it fully online, so it isn’t instantly usable. A cold backup is created when the system is shut down, so you must boot and restore, which takes longer. Incremental backups only capture changes since the last backup, so restoring requires the base full backup plus all subsequent increments, not immediate usability.

When you’re recovering from a disaster, how quickly you can get service back depends on how the backup was taken. A hot backup is created while the system is running and is designed to be immediately usable, often supporting rapid failover or quick restoration with little or no downtime. That makes it the fastest option to get back online without a long wait.

A warm backup is ready to go but typically requires some steps to bring it fully online, so it isn’t instantly usable. A cold backup is created when the system is shut down, so you must boot and restore, which takes longer. Incremental backups only capture changes since the last backup, so restoring requires the base full backup plus all subsequent increments, not immediate usability.