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GCDL Practice Question: A CISO is designing an identity strategy for…
This GCDL practice question tests your understanding of a ciso is designing an identity strategy for…. 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.
A CISO is designing an identity strategy for Google Cloud that follows Zero Trust principles. She proposes that no long-lived credentials (API keys, service account keys) should be used for any automated workloads. What Google Cloud mechanism replaces service account keys for authenticating workloads running on Google Cloud infrastructure?
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
Using OAuth 2.0 user accounts instead of service accounts for all automated workloads
OAuth 2.0 user accounts require human interaction for authentication and are designed for user-facing applications. They cannot be used for unattended automated workloads. Service accounts with metadata-based authentication are the correct solution.
B
Distractor review
Using long-lived API keys stored in Secret Manager instead of environment variables — the keys are the same but stored more securely
Long-lived API keys remain a risk even in Secret Manager — they can be extracted and used outside the intended context. The Zero Trust approach requires eliminating long-lived credentials, not just storing them more securely.
C
Best answer
Attaching a service account to the Compute Engine VM or GKE workload, allowing the workload to obtain short-lived access tokens from the metadata server automatically — no key files required
This is the correct Zero Trust-aligned approach. A service account is attached to the VM or GKE pod. The workload calls the metadata server (169.254.169.254) to get a short-lived (1-hour) access token automatically. No key file is created, stored, or managed — eliminating the key compromise risk entirely. Workload Identity in GKE extends this to Kubernetes service accounts.
D
Distractor review
Rotating service account keys every 24 hours to minimize the exposure window
Frequent rotation reduces exposure time but doesn't eliminate the key file risk. Keys must still be distributed, stored, and managed. The Zero Trust principle is to eliminate long-lived credentials entirely through keyless authentication.
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 GCDL practice-question pages
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More questions from this exam
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Question 1
A traditional retailer currently maintains its own data centers, purchasing servers every 3–5 years and paying for facilities, power, and staff regardless of demand. When it migrates its workloads to the public cloud, which change in cost model does it experience?
Question 2
An e-commerce company plans its infrastructure for peak shopping events (e.g., Black Friday) which drive 50× normal traffic. On-premises, they must maintain 50× capacity year-round. In the cloud, they provision 50× capacity only during peak periods. Which cloud characteristic enables this cost optimization?
Question 3
Which term describes the process by which organizations integrate digital technology into all areas of their business, fundamentally changing how they operate and deliver value to customers?
Question 4
When a company moves from maintaining its own data center to using Google Cloud, which operational responsibility does Google assume that the company previously managed?
Question 5
A hospital runs a patient records system that must remain on-premises due to strict regulatory data residency requirements. However, they also want to use cloud-based AI for diagnostic imaging analysis. Which cloud deployment model best describes their architecture?
Question 6
What is virtualization in the context of cloud computing, and why is it fundamental to how cloud providers deliver services?
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FAQ
Questions learners often ask
What does this GCDL question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Attaching a service account to the Compute Engine VM or GKE workload, allowing the workload to obtain short-lived access tokens from the metadata server automatically — no key files required — Workload Identity (for GKE) and the Compute Engine metadata server allow workloads running on Google Cloud to authenticate to Google Cloud APIs using automatically managed short-lived credentials, without any key files. Google Cloud VMs can impersonate service accounts through the metadata server, which provides short-lived access tokens that rotate automatically. This eliminates the risk of key file compromise.
What should I do if I get this GCDL 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 GCDL NAT questions on configuration and troubleshooting.
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This GCDL 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 GCDL exam.