The correct architecture is active-active web servers in two regions with multi-region database replication. This design directly addresses the need for multi-region high availability for stateless web and stateful database components, because stateless web servers can scale horizontally and serve traffic simultaneously in both regions, while the stateful database requires replication across regions to ensure data consistency and failover capability. On the CompTIA Cloud+ CV0-004 exam, this scenario tests your understanding of how to decouple stateless and stateful tiers in a geo-distributed design—a common trap is assuming a single active-passive database suffices, but true multi-region availability demands database replication that supports read/write in both locations. Remember the memory tip: “Stateless spreads, stateful syncs”—the web tier spreads active traffic, while the database tier synchronizes data across regions to prevent split-brain or data loss.
CV0-004 Cloud Architecture and Design Practice Question
This CV0-004 practice question tests your understanding of cloud architecture and design. 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 migrating its on-premises application to the cloud and wants to ensure high availability across multiple geographic regions. The application consists of stateless web servers and a stateful database. Which architecture should the company implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Active-active web servers in two regions with a multi-region database replication
Option C is correct because the application requires high availability across multiple geographic regions for both stateless web servers and a stateful database. Active-active web servers in two regions ensure traffic distribution and failover, while multi-region database replication (e.g., using synchronous or asynchronous replication such as MySQL Group Replication or Aurora Global Database) keeps the stateful database synchronized across regions, enabling read/write capabilities and automatic failover without data loss.
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.
✗
Active-passive web servers in two regions with a single database in the primary region
Why it's wrong here
Single database is a single point of failure.
✗
Active-active web servers in two regions with read replicas in each region
Why it's wrong here
Read replicas do not handle write failures.
✓
Active-active web servers in two regions with a multi-region database replication
Why this is correct
Multi-region replication allows failover for both reads and writes.
Related concept
Read the scenario before looking for a memorised answer.
✗
Active-active web servers in one region with a standby database in another region
Why it's wrong here
Standby database may not be promoted quickly enough.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that read replicas alone provide high availability for a stateful database, but candidates must remember that read replicas are read-only and cannot handle writes, so they do not ensure full database availability during a primary failure.
Detailed technical explanation
How to think about this question
Multi-region database replication typically uses either synchronous replication (e.g., Google Cloud Spanner or CockroachDB with strong consistency) or asynchronous replication (e.g., AWS Aurora Global Database with a failover time of ~1 minute). The trade-off is between consistency and latency: synchronous replication ensures zero data loss but adds write latency across regions, while asynchronous replication may lose recent writes during a failover. In practice, for a stateful database, the choice depends on the application's RPO/RTO requirements.
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 practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cloud Architecture and Design — This question tests Cloud Architecture and Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Active-active web servers in two regions with a multi-region database replication — Option C is correct because the application requires high availability across multiple geographic regions for both stateless web servers and a stateful database. Active-active web servers in two regions ensure traffic distribution and failover, while multi-region database replication (e.g., using synchronous or asynchronous replication such as MySQL Group Replication or Aurora Global Database) keeps the stateful database synchronized across regions, enabling read/write capabilities and automatic failover without data loss.
What should I do if I get this CV0-004 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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