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Question 314 of 1,750

Resilient Cloud Solutions →easyMultiple SelectObjective-mapped

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 designing a disaster recovery strategy for its application. The application runs on EC2 instances and uses an RDS MySQL database. The RTO is 1 hour, and the RPO is 15 minutes. Which TWO approaches meet these requirements?

A
Use a warm standby strategy: run a scaled-down version of the application in the DR region with RDS Multi-AZ across regions.
Warm standby with cross-region replication meets RPO and RTO.
B
Use a pilot light strategy: replicate data using RDS cross-region automated backups and have a small environment running in the DR region.
Pilot light with cross-region backups can meet RPO and RTO.
C
Use a read replica in the DR region and promote it on failover.
Why wrong: Read replicas are for read scaling; promoting may cause data loss.
D
Use a Multi-Zone deployment with RDS in the same region.
Why wrong: Multi-AZ in same region does not protect against region failure.
E
Use a backup and restore strategy: take snapshots every hour and restore in the DR region on failover.
Why wrong: Hourly snapshots exceed 15-minute RPO.

Full breakdown with real-world context →

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 a warm standby strategy: run a scaled-down version of the application in the DR region with RDS Multi-AZ across regions.

Options A and B are correct. A warm standby with RDS Multi-AZ across regions ensures a standby database is ready and can be promoted quickly, meeting the 1-hour RTO. A pilot light with RDS cross-region automated backups provides replication with a 15-minute RPO; a small environment is running, allowing faster failover than a full pilot light. Option C is wrong because RDS read replicas do not support automatic failover; manual promotion can take longer than 1 hour. Option D is wrong because Multi-AZ in the same region does not protect against region failure. Option E is wrong because hourly snapshots meet RPO but restoring from snapshots typically exceeds the 1-hour RTO.

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 a warm standby strategy: run a scaled-down version of the application in the DR region with RDS Multi-AZ across regions.
Why this is correct
Warm standby with cross-region replication meets RPO and RTO.
Related concept
Read the scenario before looking for a memorised answer.
✓
Use a pilot light strategy: replicate data using RDS cross-region automated backups and have a small environment running in the DR region.
Why this is correct
Pilot light with cross-region backups can meet RPO and RTO.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a read replica in the DR region and promote it on failover.
Why it's wrong here
Read replicas are for read scaling; promoting may cause data loss.
✗
Use a Multi-Zone deployment with RDS in the same region.
Why it's wrong here
Multi-AZ in same region does not protect against region failure.
✗
Use a backup and restore strategy: take snapshots every hour and restore in the DR region on failover.
Why it's wrong here
Hourly snapshots exceed 15-minute RPO.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

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.
Use explanations to understand the rule behind the answer.

TExam Day Tips

Underline the problem statement mentally.
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

An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.

What to study next

Got this wrong? Here's your next step.

Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this DOP-C02 question test?

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 a warm standby strategy: run a scaled-down version of the application in the DR region with RDS Multi-AZ across regions. — Options A and B are correct. A warm standby with RDS Multi-AZ across regions ensures a standby database is ready and can be promoted quickly, meeting the 1-hour RTO. A pilot light with RDS cross-region automated backups provides replication with a 15-minute RPO; a small environment is running, allowing faster failover than a full pilot light. Option C is wrong because RDS read replicas do not support automatic failover; manual promotion can take longer than 1 hour. Option D is wrong because Multi-AZ in the same region does not protect against region failure. Option E is wrong because hourly snapshots meet RPO but restoring from snapshots typically exceeds the 1-hour RTO.

What should I do if I get this DOP-C02 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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