DOP-C02 Resilient Cloud Solutions Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud solutions. 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 implementing a disaster recovery strategy for its Amazon Aurora MySQL database. The primary database is in us-west-2. The company requires an RPO of less than 1 minute and an RTO of less than 5 minutes. Which solution meets these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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
✓
Use Amazon Aurora Global Database with a secondary Region cluster.
Amazon Aurora Global Database is designed for low-latency cross-Region replication with a typical RPO of 1 second and RTO of 1 minute or less, meeting the <1 minute RPO and <5 minute RTO requirements. It uses a dedicated storage-level replication channel that keeps the secondary cluster fully synchronized without impacting primary performance, and failover involves promoting the secondary cluster to primary in under a minute.
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.
✗
Create a cross-Region read replica in the secondary Region and promote it during failover.
Why it's wrong here
Replication lag can exceed 1 minute; promotion may take longer than 5 minutes.
✗
Use automated backups and restore to a new DB instance in the secondary Region.
Why it's wrong here
Automated backups have up to 5-minute RPO; restore can take hours.
✓
Use Amazon Aurora Global Database with a secondary Region cluster.
Why this is correct
Aurora Global Database provides low-latency replication and fast failover (under 1 minute for RPO, minutes for RTO).
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Take manual snapshots of the DB instance and copy them to the secondary Region every hour.
Why it's wrong here
Hourly snapshots do not meet 1-minute RPO; restore takes time.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse a cross-Region read replica (Option A) with Aurora Global Database, assuming both provide similar failover speed, but the read replica's promotion process is slower and less reliable for meeting strict RTO/RPO targets.
Detailed technical explanation
How to think about this question
Aurora Global Database leverages a dedicated, low-latency replication link at the storage layer (not the database engine layer), which replicates data from the primary cluster's storage volume to the secondary cluster's storage volume in near real-time. During a failover, the secondary cluster is promoted to primary by making its storage volume writable and updating the DNS endpoint, typically completing in under 1 minute because no redo log replay is needed—the secondary already has all committed transactions. This architecture is distinct from standard cross-Region read replicas, which rely on MySQL binary log replication and can lag significantly under heavy write loads.
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.
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.
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Amazon Aurora Global Database with a secondary Region cluster. — Amazon Aurora Global Database is designed for low-latency cross-Region replication with a typical RPO of 1 second and RTO of 1 minute or less, meeting the <1 minute RPO and <5 minute RTO requirements. It uses a dedicated storage-level replication channel that keeps the secondary cluster fully synchronized without impacting primary performance, and failover involves promoting the secondary cluster to primary in under a minute.
What should I do if I get this DOP-C02 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: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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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