Alibaba ACA-Database Exam - Topic 8 Question 100 Discussion

Actual exam question for Alibaba's ACA-Database exam

Question #: 100
Topic #: 8

PolarDB for MySQL uses shared distributed storage and supports dual-zone deployment by default. How many data replicas are available across the two zones?

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Suggested Answer: D

by Nu at Jun 17, 2026, 09:50 AM

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Nana

4 days ago

Wait, are we sure it's not 4?

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Quentin

9 days ago

Totally agree, 3 is the right answer!

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Leonora

14 days ago

It's 3 replicas across the two zones!

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Novella

20 days ago

If I recall correctly, I think there are 4 replicas across the two zones, but I might be mixing it up with another database system.

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Queenie

25 days ago

I vaguely recall that dual-zone setups often have a minimum of 3 replicas, but I can't remember the exact number for PolarDB.

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Reita

30 days ago

I feel like I practiced a similar question, and I think it was either 4 or 6 replicas.

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Stephaine

1 month ago

I think I remember something about data replicas in distributed systems, but I'm not sure how many PolarDB uses.

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