Google ACE Practice Question: Ensuring successful operation of a cloud solution
This ACE practice question tests your understanding of ensuring successful operation of 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.
Which TWO actions should be taken to reduce latency for users accessing a global application hosted on Compute Engine? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy instances in multiple regions behind a global load balancer.
Deploying instances in multiple regions behind a global load balancer (Option B) reduces latency by directing user traffic to the closest healthy backend, minimizing network round-trip time. Using Cloud CDN with a backend bucket (Option E) caches static content at edge locations worldwide, serving users from a nearby cache and offloading origin requests. Together, these actions ensure both dynamic and static content are delivered with minimal latency across a global user base.
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.
✗
Use a single region with more instances.
Why it's wrong here
Concentrates all traffic in one region, increasing latency for distant users.
✓
Deploy instances in multiple regions behind a global load balancer.
Why this is correct
Routes users to closest healthy backend.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable Cloud Armor to filter traffic.
Why it's wrong here
Security feature; does not reduce latency.
✗
Use Cloud Interconnect for connectivity.
Why it's wrong here
For hybrid connectivity, not global latency reduction.
✓
Use Cloud CDN with the backend bucket.
Why this is correct
Caches static content at edge locations.
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 often confuse 'scaling up' (more instances in one region) with 'scaling out' (multi-region deployment) and overlook that Cloud CDN is specifically for static content caching, not dynamic requests—though the question does not specify content type, the combination of B and E is the standard best practice for global latency reduction.
Detailed technical explanation
How to think about this question
Global load balancing uses Anycast IP addresses and Google's global network to route traffic to the closest healthy backend based on the user's source IP and latency measurements, leveraging Google's BGP anycast announcements. Cloud CDN caches content at over 200 edge points of presence (PoPs) worldwide, using HTTP cache-control headers and serving cached objects directly from the edge without hitting the origin. In a real-world scenario, a user in Tokyo accessing a US-hosted application might see latency drop from 150ms to under 10ms when using both a global load balancer and CDN, as traffic is terminated at a Tokyo edge PoP.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this ACE question in full detail.
Ensuring successful operation of a cloud solution — This question tests Ensuring successful operation of a cloud solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy instances in multiple regions behind a global load balancer. — Deploying instances in multiple regions behind a global load balancer (Option B) reduces latency by directing user traffic to the closest healthy backend, minimizing network round-trip time. Using Cloud CDN with a backend bucket (Option E) caches static content at edge locations worldwide, serving users from a nearby cache and offloading origin requests. Together, these actions ensure both dynamic and static content are delivered with minimal latency across a global user base.
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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