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Alibaba ACA-Database Exam - Topic 7 Question 97 Discussion

If a database exception occurs in a PolarDB cluster because important data is deleted by mistake, how i can data be restored?
A) Level-2 backup + Redo log
B) Level 1 backup + Redo log
C) Level-2 backup
D) Level-1 backup

Alibaba ACA-Database Exam - Topic 7 Question 97 Discussion

Actual exam question for Alibaba's ACA-Database exam
Question #: 97
Topic #: 7
[All ACA-Database Questions]

If a database exception occurs in a PolarDB cluster because important data is deleted by mistake, how i can data be restored?

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Suggested Answer: A

by Justine at May 03, 2026, 01:50 AM

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Tamar
26 days ago
I'm a bit confused about the redo log's role in this scenario. Does it really matter if we have Level-1 or Level-2 backup?
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Brittni
1 month ago
I remember practicing a similar question where we had to choose between Level-1 and Level-2 backups. I feel like Level-2 is usually the safer option.
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Juan
1 month ago
I think we discussed something about Level-2 backups being more comprehensive, but I'm not entirely sure how the redo log fits in.
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