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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Olen

24 days ago

I’m leaning towards C) 5. More replicas mean better availability.

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Felicidad

29 days ago

I feel like it's A) 3. Less complexity, more efficiency.

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Irma

1 month ago

I think the answer is B) 4. It makes sense for redundancy.

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Pamella

1 month ago

Definitely 3, that's how it works!

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Joni

1 month ago

I've always thought it was 5, but I guess not!

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Nana

2 months ago

Wait, are we sure it's not 4?

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Quentin

2 months ago

Totally agree, 3 is the right answer!

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Leonora

2 months ago

It's 3 replicas across the two zones!

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Novella

2 months 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

2 months 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

3 months ago

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

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Stephaine

3 months 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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