- A
Use Cloud CDN in front of an external HTTPS Load Balancer with backend services in multiple regions.
Cloud CDN caches static content at edge, and Load Balancer routes dynamic requests to nearest backend.
- B
Use Cloud NAT to allow egress traffic from instances and distribute static content via a shared VPC.
Why wrong: Cloud NAT is for outbound traffic, not content delivery.
- C
Use Cloud DNS with geo-routing to direct users to the closest regional Cloud Run service.
Why wrong: Cloud DNS does not cache content; it only resolves DNS. Cloud Run is for serverless, but static content would still need a CDN.
- D
Use VPC Network Peering to connect multiple regional VPCs and serve content from a central location.
Why wrong: Peering doesn't provide global caching or low latency; it just connects networks.
Quick Answer
The correct architecture is to use Cloud CDN in front of an external HTTPS Load Balancer with backend services in multiple regions. This combination works because Cloud CDN leverages Google’s globally distributed edge caches to serve static content like images and CSS with ultra-low latency, while the external HTTPS Load Balancer uses anycast IP to route dynamic API requests to the nearest healthy backend instance, minimizing round-trip time for users worldwide. On the Google Professional Cloud Architect exam, this scenario tests your understanding of how to decouple static and dynamic delivery paths—a common trap is choosing a single-region backend or omitting the CDN, which fails the global low-latency requirement. Remember that the load balancer handles dynamic traffic intelligently, while the CDN offloads static content; think of it as “cache the static, route the dynamic.” A useful memory tip is “CDN for the files, LB for the logic.”
Google PCA Manage implementation of cloud architecture Practice Question
This PCA practice question tests your understanding of manage implementation of cloud architecture. 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 is planning to deploy a global web application on Google Cloud. They expect low latency for users worldwide and need to serve static content (images, CSS) as well as dynamic API responses. Which architecture should they use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use Cloud CDN in front of an external HTTPS Load Balancer with backend services in multiple regions.
Cloud CDN in front of an external HTTPS Load Balancer with backend services in multiple regions is correct because it provides global anycast IP termination, low-latency content delivery via Google's edge cache for static content, and dynamic API requests are forwarded to the nearest healthy backend in the closest region. This architecture meets both the low-latency requirement for users worldwide and the need to serve both static and dynamic content efficiently.
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 Cloud CDN in front of an external HTTPS Load Balancer with backend services in multiple regions.
Why this is correct
Cloud CDN caches static content at edge, and Load Balancer routes dynamic requests to nearest backend.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use Cloud NAT to allow egress traffic from instances and distribute static content via a shared VPC.
Why it's wrong here
Cloud NAT is for outbound traffic, not content delivery.
- ✗
Use Cloud DNS with geo-routing to direct users to the closest regional Cloud Run service.
Why it's wrong here
Cloud DNS does not cache content; it only resolves DNS. Cloud Run is for serverless, but static content would still need a CDN.
- ✗
Use VPC Network Peering to connect multiple regional VPCs and serve content from a central location.
Why it's wrong here
Peering doesn't provide global caching or low latency; it just connects networks.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that DNS geo-routing alone (Option C) can provide low-latency global content delivery, but it lacks caching and introduces DNS resolution delays, making it unsuitable for static content without a CDN.
Detailed technical explanation
How to think about this question
Cloud CDN leverages Google's global edge cache points of presence (PoPs) to serve static content from the nearest location, reducing origin load. The external HTTPS Load Balancer uses global anycast IP addresses (e.g., 34.96.0.0/16) and terminates TLS at the edge, then routes dynamic requests to the closest backend service based on latency and capacity. This architecture supports both static and dynamic content in a single global frontend, with cache hit ratios often exceeding 90% for static assets.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this PCA question test?
Manage implementation of cloud architecture — This question tests Manage implementation of cloud architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud CDN in front of an external HTTPS Load Balancer with backend services in multiple regions. — Cloud CDN in front of an external HTTPS Load Balancer with backend services in multiple regions is correct because it provides global anycast IP termination, low-latency content delivery via Google's edge cache for static content, and dynamic API requests are forwarded to the nearest healthy backend in the closest region. This architecture meets both the low-latency requirement for users worldwide and the need to serve both static and dynamic content efficiently.
What should I do if I get this PCA 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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Last reviewed: Jun 30, 2026
This PCA 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 PCA exam.
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