- A
Restore the latest manual snapshot and then run SQL scripts to revert the deletion.
Why wrong: Manual snapshots may not be close to the deletion time, which can lead to restoring data that is too far back. Reversion scripts are also error-prone and may be difficult to apply safely without additional data consistency checks.
- B
Use point-in-time restore (PITR) to restore the database to a specific timestamp before the deletion, based on automated backups.
With automated backups enabled, RDS supports PITR within the retention window. PITR lets you restore to any second within that window, so you can select a timestamp just before the destructive deletion occurred. This avoids restoring a potentially stale snapshot and eliminates the need for risky manual compensating scripts.
- C
Promote an existing read replica to be the primary and then copy the missing rows from logs.
Why wrong: If the replica is an active read replica, it generally replicates changes from the source, including the delete operation. Promoting the replica would typically preserve the deleted state, not recover the missing rows. Also, relying on “logs” is not a standard RDS row-level recovery mechanism.
- D
Recreate the instance using the most recent CloudWatch metric alarm snapshot of storage metrics.
Why wrong: CloudWatch metric alarms store metrics/threshold evaluations, not database contents or row data snapshots. Metrics are not sufficient to reconstruct deleted rows.
SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient 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 developer accidentally deletes important rows in an RDS database. The mistake is discovered 45 minutes later. The database has automated backups enabled with a retention period of 7 days. What is the best way to restore the database to a point just before the deletion?
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 restore (PITR) to restore the database to a specific timestamp before the deletion, based on automated backups.
Point-in-time restore (PITR) allows you to restore an RDS DB instance to any second within the automated backup retention period (here, 7 days). Since the deletion occurred 45 minutes ago, you can specify a timestamp just before the deletion, and RDS will replay the transaction logs to bring the database to that exact state. This is the most precise and efficient recovery method for accidental data modifications.
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.
- ✗
Restore the latest manual snapshot and then run SQL scripts to revert the deletion.
Why it's wrong here
Manual snapshots may not be close to the deletion time, which can lead to restoring data that is too far back. Reversion scripts are also error-prone and may be difficult to apply safely without additional data consistency checks.
- ✓
Use point-in-time restore (PITR) to restore the database to a specific timestamp before the deletion, based on automated backups.
Why this is correct
With automated backups enabled, RDS supports PITR within the retention window. PITR lets you restore to any second within that window, so you can select a timestamp just before the destructive deletion occurred. This avoids restoring a potentially stale snapshot and eliminates the need for risky manual compensating scripts.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Promote an existing read replica to be the primary and then copy the missing rows from logs.
Why it's wrong here
If the replica is an active read replica, it generally replicates changes from the source, including the delete operation. Promoting the replica would typically preserve the deleted state, not recover the missing rows. Also, relying on “logs” is not a standard RDS row-level recovery mechanism.
- ✗
Recreate the instance using the most recent CloudWatch metric alarm snapshot of storage metrics.
Why it's wrong here
CloudWatch metric alarms store metrics/threshold evaluations, not database contents or row data snapshots. Metrics are not sufficient to reconstruct deleted rows.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume manual snapshots or read replicas can be used for granular point-in-time recovery, but only automated backups with transaction logs enable restoring to a specific second within the retention period.
Detailed technical explanation
How to think about this question
Under the hood, RDS automated backups consist of daily snapshots plus transaction logs (stored in S3) that are retained for the backup retention window. When you perform a PITR, RDS restores the most recent daily snapshot and then applies the transaction logs up to the specified timestamp, effectively replaying all committed transactions except those after the target time. This process can take from minutes to hours depending on the database size and the number of logs to replay, but it guarantees a consistent state without manual intervention.
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 restore (PITR) to restore the database to a specific timestamp before the deletion, based on automated backups. — Point-in-time restore (PITR) allows you to restore an RDS DB instance to any second within the automated backup retention period (here, 7 days). Since the deletion occurred 45 minutes ago, you can specify a timestamp just before the deletion, and RDS will replay the transaction logs to bring the database to that exact state. This is the most precise and efficient recovery method for accidental data modifications.
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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