SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient architectures. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 customer portal must recover from a regional outage within a few hours. The business wants lower ongoing cost than a fully active second Region and does not want to rebuild everything from scratch during the outage. Which two DR patterns best fit that goal? Select two.
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Pilot light
Pilot light is correct because it maintains a minimal core infrastructure (e.g., database, networking) in the secondary Region that can be quickly scaled up during a disaster, meeting the recovery time objective (RTO) of a few hours while keeping ongoing costs lower than a fully active second Region. It avoids rebuilding everything from scratch by having critical data and configurations already in place, allowing compute resources to be launched on demand.
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.
✗
Backup and restore
Why it's wrong here
This is the lowest-cost option, but recovery usually requires rebuilding much of the environment after a disaster.
✓
Pilot light
Why this is correct
Pilot light keeps only core components running in the secondary Region, which lowers cost while reducing recovery time.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Warm standby
Why this is correct
Warm standby keeps a scaled-down but functional environment ready, which shortens recovery while avoiding full active-active cost.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Multi-site active-active
Why it's wrong here
Active-active improves availability, but it runs production in multiple Regions continuously and costs more than the stated goal.
✗
Single-AZ deployment
Why it's wrong here
A single-AZ design is not a regional disaster recovery strategy and does not meet the recovery objective.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the distinction between pilot light and warm standby—the trap here is that candidates may confuse pilot light with backup and restore, not realizing that pilot light maintains a live, minimal environment (e.g., database replicas) rather than just backup files, enabling faster recovery without full rebuild.
Detailed technical explanation
How to think about this question
Pilot light uses a minimal footprint (e.g., a small Amazon RDS instance or replicated data in Amazon S3) in the secondary Region, with no compute running until failover. During recovery, you scale up by launching EC2 instances from pre-built AMIs and updating Route 53 DNS records, achieving RTOs of minutes to a few hours. Warm standby, the other correct option, runs a scaled-down but fully functional copy of the production environment (e.g., smaller EC2 instances, a read-replica database) that can be scaled up during failover, offering faster recovery than pilot light but at slightly higher cost.
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
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.
Design Resilient Architectures — This question tests Design Resilient Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Pilot light — Pilot light is correct because it maintains a minimal core infrastructure (e.g., database, networking) in the secondary Region that can be quickly scaled up during a disaster, meeting the recovery time objective (RTO) of a few hours while keeping ongoing costs lower than a fully active second Region. It avoids rebuilding everything from scratch by having critical data and configurations already in place, allowing compute resources to be launched on demand.
What should I do if I get this SAA-C03 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". 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.
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Question Discussion
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