The correct choice is synchronous database replication with automated failover because it guarantees zero data loss by committing every write transaction to both the primary and recovery sites before acknowledging success, effectively achieving a recovery point objective (RPO) of zero. This fully synchronized, hot standby replica can be promoted within seconds to minutes, easily satisfying the 1-hour recovery time objective (RTO). On the CompTIA Cloud+ CV0-004 exam, this scenario tests your understanding that synchronous replication is the only strategy that meets a strict RPO of 15 minutes or less, while automated failover ensures the RTO is met without manual intervention. A common trap is confusing asynchronous replication, which introduces lag and risks data loss, with synchronous replication’s immediate consistency. Remember the mnemonic “Sync for Zero” — synchronous replication means RPO equals zero, making it the go-to for any disaster recovery plan requiring near-instant data integrity across geographic regions.
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 cloud architect is designing a disaster recovery plan for a cloud-based application. The primary site is in a cloud region, and the recovery site is in a different geographic region. The application uses a relational database with synchronous replication. The recovery time objective (RTO) is 1 hour, and the recovery point objective (RPO) is 15 minutes. Which replication strategy BEST meets these objectives?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure synchronous database replication with automated failover
Synchronous database replication with automated failover ensures that every write transaction is committed to both the primary and recovery site databases before acknowledging success, guaranteeing zero data loss (RPO=0) and near-instantaneous failover within seconds to minutes, which comfortably meets the RTO of 1 hour and RPO of 15 minutes. This strategy directly satisfies the strict RPO requirement by maintaining a fully synchronized, hot standby replica that can be promoted immediately upon failure.
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.
✗
Perform daily backups of the database and restore at the recovery site
Why it's wrong here
Daily backups result in RPO up to 24 hours, exceeding 15 minutes.
✗
Use storage-level asynchronous replication between regions
Why it's wrong here
Asynchronous replication may have higher RPO and slower failover.
✗
Use a script to copy database logs every hour to the recovery site
Why it's wrong here
Hourly log shipping results in RPO up to 1 hour, exceeding 15 minutes.
✓
Configure synchronous database replication with automated failover
Why this is correct
Synchronous replication provides near-zero RPO and fast failover.
Clue confirmation
The clue words "best", "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that asynchronous replication (Option B) can meet a low RPO like 15 minutes, but the trap is that asynchronous replication inherently risks data loss equal to the replication lag, which can spike unpredictably under load or network congestion, making it unsuitable for strict RPO requirements.
Detailed technical explanation
How to think about this question
Synchronous replication typically uses a two-phase commit protocol (e.g., 2PC) or a quorum-based mechanism to ensure data consistency across regions, but it introduces latency proportional to the round-trip time between sites (e.g., 50–100 ms for cross-continent links), which can impact application write performance. In practice, cloud providers like AWS RDS Multi-AZ or Azure SQL Database failover groups implement this with automatic health monitoring and DNS-level failover, achieving RTOs of 30–60 seconds. A subtle behavior is that synchronous replication may degrade to asynchronous if the secondary site becomes unreachable, potentially violating RPO during network partitions unless strict consistency settings are enforced.
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: Configure synchronous database replication with automated failover — Synchronous database replication with automated failover ensures that every write transaction is committed to both the primary and recovery site databases before acknowledging success, guaranteeing zero data loss (RPO=0) and near-instantaneous failover within seconds to minutes, which comfortably meets the RTO of 1 hour and RPO of 15 minutes. This strategy directly satisfies the strict RPO requirement by maintaining a fully synchronized, hot standby replica that can be promoted immediately upon failure.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best", "primary". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Variation 1. A cloud architect is planning a disaster recovery (DR) strategy for a mission-critical application. The RTO must be under 1 hour and RPO under 15 minutes. The primary site is in a different region. Which DR pattern meets these requirements?
medium
A.Backup and restore
B.Cold standby
✓ C.Pilot light
D.Multi-site active-active
Why C: The pilot light pattern meets the RTO under 1 hour and RPO under 15 minutes because it keeps a minimal core set of services (e.g., database replicating via asynchronous replication) running in the DR region, allowing rapid scale-up of the full application stack during failover. This pattern balances cost and recovery speed, as the replicated data ensures an RPO of seconds to minutes, and the pre-provisioned core infrastructure enables failover within minutes, satisfying the strict RTO.
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Question Discussion
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