Alibaba ACA-Database Exam - Topic 7 Question 97 Discussion

Actual exam question for Alibaba's ACA-Database exam

Question #: 97
Topic #: 7

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

ALevel-2 backup + Redo log

BLevel 1 backup + Redo log

CLevel-2 backup

DLevel-1 backup

Show Suggested Answer

Suggested Answer: A

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

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Jutta

4 days ago

I think A is the best choice. Level-2 backup is crucial.

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Stanton

9 days ago

Totally agree with A, it's the safest choice!

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Dolores

14 days ago

Wait, are we sure about the redo log part?

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Gearldine

20 days ago

C) Level-2 backup alone isn't enough, right?

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Stephaine

25 days ago

I think B) Level 1 backup + Redo log could work too.

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Andra

30 days ago

A) Level-2 backup + Redo log is the best option.

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Lashon

1 month ago

I vaguely recall that Level-1 backups are quicker but less reliable for restoring important data. Maybe that's why Level-2 is the better choice here?

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Tamar

3 months 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

3 months 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

3 months 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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