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Which of the following backup lets you restore your data to a point in time and saves multiple copies of any file that has been changed?

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Which of the following backup lets you restore your data to a point in time and saves multiple copies of any file that has been changed?

(a) Point-in-time

(b) Differential

(c) Reverse backup

(d) None of the mentioned

I had been asked this question in homework.

Question is from Cloud Backup Solutions topic in chapter Cloud-Based Storage of Cloud Computing

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The correct choice is (a) Point-in-time

Explanation: At least 10 to 30 copies of previous versions of files should be saved.

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