- A
Use point-in-time recovery (PITR) to restore to a new RDS DB instance as of 90 minutes ago, then validate and cut over after approval.
PITR can restore a new DB instance to a specific timestamp using automated backups and transaction logs. Restoring to a separate instance avoids overwriting or interrupting the existing production instance during validation.
- B
Restore a manual snapshot and overwrite the existing production DB instance so the data matches exactly 90 minutes ago.
Why wrong: Overwriting production interrupts service. In addition, manual snapshots may not provide the precision needed to match the exact 90-minute timestamp.
- C
Wait for the next automated backup window and then restart the current DB instance to roll back changes automatically.
Why wrong: Automated backups support restore operations, not automatic rollback. Restarting the DB instance does not rewind logical changes caused by an update.
- D
Use cross-region read replicas to rewind changes and promote the replica to become the writer immediately.
Why wrong: Read replicas replicate the current data stream; they do not provide a built-in mechanism to rewind to a historical point in time. Promoting a replica would not correct the data to the state from 90 minutes ago.
SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient architectures. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 team accidentally updates critical rows in an Amazon RDS for PostgreSQL database. Automated backups are enabled. They need to recover the data to the exact state as of 90 minutes ago.
They also cannot risk interrupting the current production database instance while investigators validate the restored data.
Which recovery strategy best meets these constraints?
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 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 point-in-time recovery (PITR) to restore to a new RDS DB instance as of 90 minutes ago, then validate and cut over after approval.
Point-in-time recovery (PITR) for Amazon RDS allows you to restore a DB instance to any second within the backup retention period, using automated backups and transaction logs. By restoring to a new RDS instance as of 90 minutes ago, you create an isolated copy for validation without affecting the production database. This meets both the recovery point objective (RPO) of 90 minutes and the constraint of no interruption to the current production instance.
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 point-in-time recovery (PITR) to restore to a new RDS DB instance as of 90 minutes ago, then validate and cut over after approval.
Why this is correct
PITR can restore a new DB instance to a specific timestamp using automated backups and transaction logs. Restoring to a separate instance avoids overwriting or interrupting the existing production instance during validation.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Restore a manual snapshot and overwrite the existing production DB instance so the data matches exactly 90 minutes ago.
Why it's wrong here
Overwriting production interrupts service. In addition, manual snapshots may not provide the precision needed to match the exact 90-minute timestamp.
- ✗
Wait for the next automated backup window and then restart the current DB instance to roll back changes automatically.
Why it's wrong here
Automated backups support restore operations, not automatic rollback. Restarting the DB instance does not rewind logical changes caused by an update.
- ✗
Use cross-region read replicas to rewind changes and promote the replica to become the writer immediately.
Why it's wrong here
Read replicas replicate the current data stream; they do not provide a built-in mechanism to rewind to a historical point in time. Promoting a replica would not correct the data to the state from 90 minutes ago.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse point-in-time recovery with snapshot restoration or assume that read replicas can be used for time-based rollbacks, but only PITR provides the exact time-targeted restore without affecting the production instance.
Detailed technical explanation
How to think about this question
Amazon RDS PITR uses stored automated backups and transaction logs (Write-Ahead Logs in PostgreSQL) to reconstruct the database to any specified time within the retention window. The restore creates a new DB instance with a different endpoint, allowing parallel validation. The retention window for automated backups defaults to 7 days, and PITR granularity is typically within 5 minutes of the target time, though for PostgreSQL the actual precision depends on log retention and can be as fine as one second.
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.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
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: Use point-in-time recovery (PITR) to restore to a new RDS DB instance as of 90 minutes ago, then validate and cut over after approval. — Point-in-time recovery (PITR) for Amazon RDS allows you to restore a DB instance to any second within the backup retention period, using automated backups and transaction logs. By restoring to a new RDS instance as of 90 minutes ago, you create an isolated copy for validation without affecting the production database. This meets both the recovery point objective (RPO) of 90 minutes and the constraint of no interruption to the current production instance.
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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Last reviewed: Jun 11, 2026
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