The answer is the pilot light disaster recovery strategy. This approach is correct because it maintains a minimal, always-on core of critical infrastructure—such as a small database or a few EC2 instances—in the secondary Region, while the rest of the application remains dormant. When a full Region outage occurs, this “pilot light” can be rapidly scaled up to full production capacity, balancing low ongoing costs with the ability to recover from a complete failure. On the SAA-C03 exam, this question tests your understanding of the four DR strategies (backup and restore, pilot light, warm standby, and multi-site active-active) and their cost-recovery trade-offs. A common trap is confusing pilot light with warm standby; remember that pilot light keeps only a tiny core running, whereas warm standby runs a scaled-down but fully functional copy. Memory tip: think of a real pilot light in a furnace—a small flame ready to ignite the full system when needed.
SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. 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 wants to protect a critical application from a full Region outage. The secondary Region should keep only a small amount of infrastructure running most of the time to control cost. Which disaster recovery strategy fits best?
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
The pilot light strategy is correct because it keeps a minimal core of infrastructure (e.g., a small database, a few EC2 instances) running in the secondary Region, while the bulk of the application remains dormant. In a full Region outage, the pilot light can be rapidly scaled up to full production capacity, meeting the requirement of low ongoing cost with the ability to recover from a complete Region 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.
✓
Pilot light
Why this is correct
Pilot light keeps a minimal version of the environment running in the backup Region, which helps reduce cost while still supporting recovery.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Active-active
Why it's wrong here
Active-active keeps both Regions serving traffic, which is usually more expensive than the requirement described.
✗
Single-AZ deployment
Why it's wrong here
A single-AZ deployment does not protect against a complete Regional outage and is less resilient overall.
✗
Blue/green deployment
Why it's wrong here
Blue/green is mainly a deployment technique, not a full multi-Region disaster recovery strategy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'pilot light' with 'active-active' or 'warm standby,' mistakenly thinking that any multi-Region setup must run full capacity, when the pilot light specifically minimizes cost by keeping only a minimal footprint until failover is triggered.
Detailed technical explanation
How to think about this question
In a pilot light setup, the secondary Region typically runs a minimal stack—such as a replicated RDS instance or a small EC2 instance with critical data—using Route 53 DNS failover to redirect traffic. The recovery process involves scaling out the pilot light environment via Auto Scaling groups and pre-configured AMIs, often achieving RTOs of minutes to hours. A real-world scenario is a financial application that replicates its database to a secondary Region using cross-Region read replicas, keeping only the database and a single application server running to minimize costs while ensuring data durability.
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 Secure Architectures — This question tests Design Secure Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Pilot light — The pilot light strategy is correct because it keeps a minimal core of infrastructure (e.g., a small database, a few EC2 instances) running in the secondary Region, while the bulk of the application remains dormant. In a full Region outage, the pilot light can be rapidly scaled up to full production capacity, meeting the requirement of low ongoing cost with the ability to recover from a complete Region failure.
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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