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Alibaba ACA-Operator Exam - Topic 8 Question 99 Discussion

A developer has written a web application using a microservice architecture,in such an architecture, the client (web browser or mobile application) first initiates a request. The request first reaches the load balancer, then goes through an authentication service, a billing service, then requests a resource, and finally a result is returned. How many spans does such a call chainconsist of?
C) 5
A) 3
B) 4
D) 6

Alibaba ACA-Operator Exam - Topic 8 Question 99 Discussion

Actual exam question for Alibaba's ACA-Operator exam
Question #: 99
Topic #: 8
[All ACA-Operator Questions]

A developer has written a web application using a microservice architecture,

in such an architecture, the client (web browser or mobile application) first initiates a request. The request first reaches the load balancer, then goes through an authentication service, a billing service, then requests a resource, and finally a result is returned. How many spans does such a call chain

consist of?

Show Suggested Answer Hide Answer
Suggested Answer: C

1-request, 2-load balancer, 3-authentication service, 4-billing service, 5- resource request


by Coleen at May 27, 2026, 07:12 PM

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Yolando
1 day ago
Load balancer, auth, billing, resource request, and result.
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Emilio
6 days ago
Why 5?
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Yolando
12 days ago
I think it’s 5 spans.
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Emilio
17 days ago
This question is tricky!
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Miesha
22 days ago
This is confusing, can someone explain the spans?
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Anabel
27 days ago
I thought it was 6, but I guess 5 is right.
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Carlee
1 month ago
Wait, are we counting the load balancer too?
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Herminia
1 month ago
Totally agree, 5 makes sense!
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Rebecka
1 month ago
There are 5 spans in that call chain.
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Olive
2 months ago
I recall practicing a question that had a similar setup, and I think it was 5 spans.
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Karol
2 months ago
I feel like the load balancer and each service should count, so maybe it's 4?
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Emerson
2 months ago
I'm not entirely sure, but I remember a similar question where we counted each step. Could it be 6?
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Malinda
2 months ago
I think there are 5 spans because each service in the chain counts as a span, right?
upvoted 0 times
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