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Alibaba ACA-Developer Exam - Topic 3 Question 95 Discussion

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)
A) When the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate. and B) Insufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early. and E) Cache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).
C) HTTP Header settings may cause cache misses.
D) The origin site has a large number of dynamic resources.

Alibaba ACA-Developer Exam - Topic 3 Question 95 Discussion

Actual exam question for Alibaba's ACA-Developer exam
Question #: 95
Topic #: 3
[All ACA-Developer Questions]

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)

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Suggested Answer: A, B, E

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

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Shad
27 days ago
I think dynamic resources are a big factor too.
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Percy
1 month ago
A low traffic site can definitely lead to a low cache hit rate.
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Clorinda
2 months 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
2 months 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
2 months 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
2 months 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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