In an online, real-time system, which of the following would be most likely to be used as backup for an application's master file maintained on magnetic disk?
A)At specified periods the disk files would be dumped to (copied on)magnetic tape along with the period's transactions
B)A duplicate disk file would be maintained and all activity would be copied on magnetic tape continuously
C)The grandfather-parent-child technique would be employed to retain disk files
D)All source documents for transactions would be retained
E)The disk files would be copied to magnetic tape continuously

Question

Quizplus · Accepted Answer

The most common method for backing up data in an online, real-time system is to periodically dump the disk files to magnetic tape along with the period's transactions. This ensures that there is a backup of both the data and the transactions that have occurred since the last backup.

In an Online, Real-Time System, Which of the Following Would