As updates to an online order entry system are processed, the updates are recorded on a transaction tape and a hard copy transaction log. At the end of the day, the order entry files are backed up on tape. During the backup procedure, a drive malfunctions and the order entry files are lost. Which of the following is necessary to restore these files?
A. The previous days backup file and the current transaction tape
B. The previous days transaction file and the current transaction tape
C. The current transaction tape and the current hard copy transaction log
D. The current hard copy transaction log and the previous days transaction file
Explanation:
The previous days backup file will be the most current historical backup of activity in the system. The current days transaction file will contain all of the days activity. Therefore, the combination of these two files will enable full recovery up to the point of interruption.