Alibaba ACA-Developer Exam - Topic 3 Question 95 Discussion

Actual exam question for Alibaba's ACA-Developer exam

Question #: 95
Topic #: 3

If a user finds that the Content Delivery Network (CDN) cache hit rate is low, what could be the reason? (Number of correct answers: 3)

AWhen the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate.

BInsufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early.

CHTTP Header settings may cause cache misses.

DThe origin site has a large number of dynamic resources.

ECache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).

Show Suggested Answer

Suggested Answer: A, B, E

by Melynda at Mar 31, 2026, 11:42 AM

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Clorinda

6 days ago

I’m a bit confused about option A; I thought low traffic wouldn’t necessarily mean a low cache hit rate, but maybe it does if there are fewer requests overall?

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Chaya

11 days ago

I practiced a similar question about CDN performance, and I feel like option E about cache configuration is likely a reason for low hit rates.

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Marci

16 days ago

I'm not entirely sure, but I think the HTTP Header settings could definitely play a role in cache misses, so maybe option C is correct too.

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Nancey

21 days ago

I remember discussing how dynamic resources can really impact cache hit rates, so I think option D might be one of the answers.

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