Google ACE Deploying and implementing a cloud solution Practice Question
This ACE practice question tests your understanding of deploying and implementing a cloud solution. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 developer is deploying an HTTP-triggered Cloud Function for a production application. Which TWO configuration options should be applied to ensure security and control costs? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set a maximum instances limit
Setting a maximum instances limit (option B) is correct because it prevents uncontrolled scaling of Cloud Functions, which could lead to excessive costs due to high concurrency. By capping the number of concurrent function instances, you ensure that even under heavy load, the function does not scale beyond a predefined budget, directly controlling cost in a production environment.
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.
✗
Allow unauthenticated invocations
Why it's wrong here
Allowing unauthenticated access is insecure; authentication should be required.
✓
Set a maximum instances limit
Why this is correct
Maximum instances prevents uncontrolled scaling and cost spikes.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set minimum instances to 0
Why it's wrong here
Minimum instances 0 is default and reduces cost when idle, but it's not specifically a security measure.
✗
Configure a custom domain for the function
Why it's wrong here
Custom domains are optional and not primarily for security or cost.
✓
Use a service account to authenticate invocations
Why this is correct
Service accounts provide a secure way to authenticate callers.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that setting minimum instances to 0 is a cost-saving measure, but it is actually the default and does not control costs; the trap is confusing 'minimum instances' with 'maximum instances' for cost control.
Detailed technical explanation
How to think about this question
Cloud Functions scale by creating new instances based on incoming requests, and without a maximum instances limit, a sudden traffic spike could spawn hundreds of instances, each incurring compute time costs. The maximum instances setting is enforced at the Cloud Functions infrastructure level, using a concurrency limit that caps the number of function instances, not just requests per instance. In a real-world scenario, a DDoS attack or a viral event could cause runaway costs if no limit is set, making this a critical cost governance control.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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: Set a maximum instances limit — Setting a maximum instances limit (option B) is correct because it prevents uncontrolled scaling of Cloud Functions, which could lead to excessive costs due to high concurrency. By capping the number of concurrent function instances, you ensure that even under heavy load, the function does not scale beyond a predefined budget, directly controlling cost in a production environment.
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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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.
Question Discussion
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