Google ACE Deploying and implementing a cloud solution Practice Question
This ACE practice question tests your understanding of deploying and implementing a cloud solution. 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 company runs an App Engine Standard application with multiple versions. They want to gradually roll out new features by sending a small percentage of traffic to a new version. How should they implement this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use App Engine's traffic splitting feature to assign a percentage of traffic to the new version
App Engine Standard provides built-in traffic splitting, allowing you to assign a percentage of incoming requests to different versions of the same service. This is the simplest and most direct way to gradually roll out a new feature by sending a small percentage of traffic to the new version without needing external load balancers or additional services.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Deploy the new version and delete the old version
Why it's wrong here
This is an all-or-nothing approach, not gradual.
✗
Use Cloud Load Balancing to distribute traffic between versions
Why it's wrong here
App Engine handles traffic routing internally; external load balancing is not needed.
✗
Create a new service for the new version and use a custom domain
Why it's wrong here
Creating a separate service would require manual routing and is not the standard gradual rollout method.
✓
Use App Engine's traffic splitting feature to assign a percentage of traffic to the new version
Why this is correct
Traffic splitting is natively supported by App Engine for gradual rollouts.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse App Engine's internal traffic splitting with external Cloud Load Balancing, thinking they need to set up a separate load balancer when App Engine already provides this capability natively for version-level traffic distribution.
Detailed technical explanation
How to think about this question
App Engine traffic splitting uses a deterministic algorithm based on the request's cookie or IP address to ensure consistent routing for a given user during a gradual rollout. You can specify the split via the `gcloud app services set-traffic` command or the Cloud Console, setting a percentage like 5% to the new version and 95% to the old version. This feature is ideal for canary deployments and A/B testing, as it allows you to monitor the new version's performance and errors before fully migrating traffic.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this ACE question in full detail.
Deploying and implementing a cloud solution — This question tests Deploying and implementing a cloud solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use App Engine's traffic splitting feature to assign a percentage of traffic to the new version — App Engine Standard provides built-in traffic splitting, allowing you to assign a percentage of incoming requests to different versions of the same service. This is the simplest and most direct way to gradually roll out a new feature by sending a small percentage of traffic to the new version without needing external load balancers or additional services.
What should I do if I get this ACE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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