Final answer:
The type of backup used for immediate recovery of a lost file is working copies, which are real-time replicas of current work, unlike other backup strategies that may not be suitable for immediate restoration.
Step-by-step explanation:
The type of backups used for immediate recovery of a lost file is B. Working copies. Working copies are live versions of files that are saved in real-time or near-real-time and serve as a direct representation of current work. This method allows a user to recover a file quickly to the most recent state, ensuring minimal data loss in the event of a corruption or accidental deletion. While onsite storage, incremental backup, and differential backup can be used to store and recover data, they are usually part of a larger backup strategy and not designed explicitly for immediate file recovery.
The type of backup used for immediate recovery of a lost file is Working Copies.
Working copies are the most up-to-date versions of files that are readily accessible and can be used to replace a lost or corrupted file. They are typically stored on local storage such as the user's computer or network drive. When a file is lost or becomes inaccessible, the working copies can be used to quickly restore the file.
Onsite storage is a type of backup that involves keeping copies of files at the same physical location as the original files, which may not be helpful for immediate recovery of a lost file. Incremental backup and differential backup are both types of backup strategies that involve backing up only the changes made since the last full backup, and may not be suitable for immediate recovery of a lost file.