What is the BEST backup strategy for a large database with data supporting online sales?

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What is the BEST backup strategy for a large database with data supporting online sales?

A.
Weekly full backup with daily incremental backup

B.
Daily full backup

C.
Clustered servers

D.
Mirrored hard disks

Explanation:
Weekly full backup and daily incremental backup is the best backup strategy; it ensures the ability
to recover the database and yet reduces the daily backup time requirements. A full backup normally
requires a couple of hours, and therefore it can beimpractical to conduct a full backup every day.
Clustered servers provide a redundant processing capability, but are not a backup. Mirrored hard
disks will not help in case of disaster.

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