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ACE Practice Question: Allow a vendor to upload files to a specific…
This ACE practice question tests your understanding of allow a vendor to upload files to a specific…. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 want to allow a vendor to upload files to a specific Cloud Storage bucket in your project without creating a GCP account for them. The upload URL should expire after 24 hours. Which mechanism should you use?
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
Distractor review
Make the Cloud Storage bucket publicly writable and share the bucket URL.
Making a bucket publicly writable exposes it to anyone on the internet, not just the vendor — a significant security risk.
B
Distractor review
Add the vendor's email to the bucket's IAM policy with Storage Object Creator role.
This requires the vendor to have a Google account and grants persistent access. Signed URLs are the right solution for temporary external access without account requirements.
C
Distractor review
Create a GCP service account for the vendor and share the key JSON file.
Sharing a service account key grants permanent access and requires GCP account management. Signed URLs are purpose-built for this temporary, external access pattern.
D
Best answer
Generate a Signed URL with a 24-hour expiration for the specific bucket path.
Signed URLs provide authenticated, time-limited, no-account-required access to Cloud Storage. The vendor can upload directly using the URL until expiration.
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.
Question 1
What is the correct order of the Google Cloud resource hierarchy from highest to lowest level?
Question 2
A compliance archive stores legal documents accessed at most once per quarter. Which Cloud Storage class minimizes storage cost while meeting that access pattern?
Question 3
Which gcloud command creates a Compute Engine VM named 'web-01' using the e2-medium machine type in zone us-central1-a?
Question 4
A team wants to receive an email alert when the average CPU utilization of VMs in a managed instance group exceeds 80% for more than 5 minutes. What should they create in Cloud Monitoring?
Question 5
A junior developer needs read-only access to all GCP resources in a project. Which IAM role grants the minimum permissions required?
Question 6
A startup creates its first Google Cloud project. Before deploying any paid resources, what must be linked to the project?
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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: Generate a Signed URL with a 24-hour expiration for the specific bucket path. — Signed URLs provide time-limited, pre-authenticated access to Cloud Storage objects without requiring a Google account. A signed URL is generated server-side using a service account's private key (or via the IAM signBlob API) with a specified expiration. The vendor uses the URL to upload the file directly to GCS. After expiration, the URL is invalid.
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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This ACE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ACE exam.