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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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Son
3 days ago
I think A is the best choice.
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Rodrigo
9 days ago
This question is tricky.
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Deja
14 days ago
D is too risky. Level-1 alone won't cut it.
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Audry
19 days ago
C seems too limited. Level-2 is the way to go.
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Tegan
24 days ago
I like A too. Redo log is essential for recovery.
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Kiera
29 days ago
A feels right. Can't risk losing data permanently.
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Jesusita
1 month ago
But B lacks the depth of A. Level-2 is safer.
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Deeanna
1 month ago
I'm leaning towards B. Level-1 backup is still useful.
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Kate
1 month ago
I agree, A makes sense. Redo log helps too.
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Jutta
2 months ago
I think A is the best choice. Level-2 backup is crucial.
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Stanton
2 months ago
Totally agree with A, it's the safest choice!
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Dolores
2 months ago
Wait, are we sure about the redo log part?
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Gearldine
2 months ago
C) Level-2 backup alone isn't enough, right?
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Stephaine
2 months ago
I think B) Level 1 backup + Redo log could work too.
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Andra
3 months ago
A) Level-2 backup + Redo log is the best option.
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Lashon
3 months 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
4 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
4 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
5 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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