- A
Data residency requirements
Regulations may require data to stay within specific regions.
- B
Cost of data transfer
Data transfer costs vary between regional and multi-regional configurations.
- C
Single region compliance
Why wrong: Compliance is about data location, not about being in one region.
- D
Replication lag
Why wrong: Replication lag is a database concern, not a deployment choice factor.
- E
Latency for users
Multi-regional deployment reduces latency for global users.
Question 302 of 999
Designing highly scalable, available, and reliable cloud-native applications →easyMultiple SelectObjective-mapped
Regional vs Multi-Regional Deployment — Key Factors for Global Apps | Google Professional Cloud Developer Explained
This PCD practice question tests your understanding of designing highly scalable, available, and reliable cloud-native applications. 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 three factors should be considered when choosing a regional vs. multi-regional deployment for a globally distributed application?
Quick Answer
The answer is latency for users, data residency requirements, and cost of data transfer. These three factors are critical because a globally distributed application must balance user experience with legal and operational constraints: latency drives the need for multi-regional deployment to minimize response times, while data residency mandates that certain data stay within specific geographic boundaries due to regulations like GDPR or HIPAA, forcing a regional approach. Cost of data transfer then becomes a decisive factor, as multi-regional setups incur egress fees and replication overhead that can quickly escalate. On the Google Professional Cloud Developer exam, this scenario tests your ability to weigh trade-offs between performance and compliance, often appearing in case studies where a single-region deployment is a trap for low-latency requirements. A common memory tip is to think of the “LRC” mnemonic—Latency, Residency, Cost—as the three pillars that determine whether you scale horizontally or stay local.
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
✓
Data residency requirements
When choosing between regional and multi-regional deployment for a globally distributed application, three key factors should be considered: data residency requirements, cost of data transfer, and latency for users. Data residency requirements (A) mandate that certain data must remain within specific geographic boundaries due to legal or regulatory obligations (e.g., GDPR, HIPAA). Choosing a regional deployment ensures data stays within a single region, while multi-regional deployment may require complex data replication and compliance with multiple jurisdictions. Cost of data transfer (B) is a significant factor because multi-regional deployments involve frequent data replication and cross-region traffic, which can incur higher costs compared to a single regional deployment. Latency for users (E) is critical for globally distributed applications; multi-regional deployment allows placing resources closer to users worldwide, reducing latency, while regional deployment may increase latency for remote users. Options C (single region compliance) is not a distinct factor because compliance is inherently tied to data residency requirements. Option D (replication lag) is a technical consideration but is not among the primary factors for choosing regional vs. multi-regional deployment at the architectural level.
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.
- ✓
Data residency requirements
Why this is correct
Regulations may require data to stay within specific regions.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Cost of data transfer
Why this is correct
Data transfer costs vary between regional and multi-regional configurations.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Single region compliance
Why it's wrong here
Compliance is about data location, not about being in one region.
- ✗
Replication lag
Why it's wrong here
Replication lag is a database concern, not a deployment choice factor.
- ✓
Latency for users
Why this is correct
Multi-regional deployment reduces latency for global users.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The PCD exam often tests the misconception that compliance is a separate factor from data residency, when in reality compliance requirements (like GDPR) are the driving force behind data residency decisions, making 'single region compliance' a redundant or misleading option.
Detailed technical explanation
How to think about this question
Under the hood, data residency often involves encryption key management and data localization policies enforced by cloud providers like AWS with Regions and Availability Zones. For example, AWS Outposts or Azure Availability Zones can help meet data residency by keeping data within a specific geographic area. In a real-world scenario, a financial services app must ensure customer transaction data never leaves the EU, making regional deployment mandatory despite higher latency for global users.
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.
What to study next
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FAQ
Questions learners often ask
What does this PCD question test?
Designing highly scalable, available, and reliable cloud-native applications — This question tests Designing highly scalable, available, and reliable cloud-native applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Data residency requirements — When choosing between regional and multi-regional deployment for a globally distributed application, three key factors should be considered: data residency requirements, cost of data transfer, and latency for users. Data residency requirements (A) mandate that certain data must remain within specific geographic boundaries due to legal or regulatory obligations (e.g., GDPR, HIPAA). Choosing a regional deployment ensures data stays within a single region, while multi-regional deployment may require complex data replication and compliance with multiple jurisdictions. Cost of data transfer (B) is a significant factor because multi-regional deployments involve frequent data replication and cross-region traffic, which can incur higher costs compared to a single regional deployment. Latency for users (E) is critical for globally distributed applications; multi-regional deployment allows placing resources closer to users worldwide, reducing latency, while regional deployment may increase latency for remote users. Options C (single region compliance) is not a distinct factor because compliance is inherently tied to data residency requirements. Option D (replication lag) is a technical consideration but is not among the primary factors for choosing regional vs. multi-regional deployment at the architectural level.
What should I do if I get this PCD 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 25, 2026
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