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ACE Practice Question: You deploy a Cloud Function (gen1) that calls an…
This ACE practice question tests your understanding of you deploy a cloud function (gen1) that calls an…. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You deploy a Cloud Function (gen1) that calls an external API. During testing you find the function times out after 60 seconds even though you set `--timeout=540`. You also notice the function logs show execution completing in 45 seconds before the timeout. What is the most likely cause of the external timeout?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
The HTTP client library used in the function has a default 60-second socket/connection timeout.
Many HTTP client libraries (requests, axios, etc.) have default timeouts shorter than the function timeout. The function timeout controls Cloud Functions' kill signal, not the client library's connection timeout.
B
Distractor review
Cloud VPC restricts outbound connections to 60 seconds.
VPC does not impose a 60-second connection limit on outbound traffic. This is not a VPC feature.
C
Distractor review
Cloud Functions gen1 has a hard maximum timeout of 60 seconds regardless of configuration.
Cloud Functions gen1 supports up to 540 seconds (9 minutes). The configured 540-second timeout is valid.
D
Distractor review
The function's service account lacks permission to make outbound HTTP calls.
A permission error would manifest as an auth/403 error, not a timeout. The logs show execution completing, suggesting HTTP calls are being made but timing out.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Related practice questions
Related ACE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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Question 4
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Question 5
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Question 6
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FAQ
Questions learners often ask
What does this ACE question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: The HTTP client library used in the function has a default 60-second socket/connection timeout. — Cloud Functions gen1 has a maximum timeout of 540 seconds (9 minutes) configurable by the user. However, HTTP-triggered functions have a hard internal limit where if the function doesn't send an HTTP response within the configured timeout, it's killed. The 60-second issue is likely the external API's own connection or response timeout, not the function's configured timeout. Alternatively, the function's outbound HTTP client may have a default 60-second socket timeout that needs to be increased in the application code.
What should I do if I get this ACE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ACE NAT questions on configuration and troubleshooting.
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