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GCDL Practice Question: A DevOps team wants to implement a release…
This GCDL practice question tests your understanding of a devops team wants to implement a release…. 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 DevOps team wants to implement a release process where a new application version is first deployed to 5% of production traffic, monitored for errors, then gradually increased to 100% if metrics remain healthy. Which deployment strategy does this describe?
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
Recreate deployment, where the old version is terminated before the new version is deployed
Recreate deployment causes downtime by shutting down old instances before starting new ones. The described gradual rollout maintains both versions running simultaneously — the opposite of recreate.
B
Distractor review
Blue/green deployment, where two identical environments run simultaneously and traffic is switched atomically
Blue/green switches all traffic at once from the old (blue) to new (green) environment. The gradual percentage-based rollout described is not blue/green.
C
Best answer
Canary deployment, where a new version receives a small percentage of traffic first and is progressively rolled out as metrics confirm it is healthy
Canary deployment precisely matches the description: 5% traffic initially, monitoring, then gradual increase to 100%. The term comes from the mining practice of using canaries to detect dangerous gas — the canary deployment detects problems before full rollout.
D
Distractor review
Rolling deployment, where instances are updated sequentially one at a time until all run the new version
Rolling deployment replaces instances sequentially (all run the new version once done). It doesn't maintain a percentage traffic split or provide the fine-grained control of a canary.
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.
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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: Canary deployment, where a new version receives a small percentage of traffic first and is progressively rolled out as metrics confirm it is healthy — Canary deployment releases a new version to a small subset of users first (the 'canary' is the early warning system). Metrics are monitored; if the canary behaves well, traffic is progressively shifted to the new version. If problems are detected, the canary can be rolled back immediately with minimal user impact. This is distinct from blue/green (full traffic switch) and rolling updates (sequential instance replacement).
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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