DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. 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.
Which THREE factors should be considered when selecting the backup strategy for an Amazon RDS for PostgreSQL DB instance? (Choose 3.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The backup retention period
Option A is correct because the backup retention period directly determines how far back you can perform a point-in-time recovery (PITR) for an RDS for PostgreSQL instance. Amazon RDS stores automated backups and transaction logs for the specified retention period (1 to 35 days), and this period must be aligned with your compliance and operational requirements. Choosing an appropriate retention period is a fundamental factor in defining the backup strategy.
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.
✓
The backup retention period
Why this is correct
Retention period determines how long backups are stored, affecting cost and compliance.
Related concept
Read the scenario before looking for a memorised answer.
✓
The Recovery Point Objective (RPO) requirement
Why this is correct
RPO determines how often backups are taken to minimize data loss.
Related concept
Read the scenario before looking for a memorised answer.
✓
The impact of the backup window on database performance
Why this is correct
Backups can cause I/O impact; choosing a low-activity window is important.
Related concept
Read the scenario before looking for a memorised answer.
✗
The need for Multi-AZ deployment
Why it's wrong here
Multi-AZ is for high availability, not backup strategy.
✗
The encryption at rest requirement
Why it's wrong here
Encryption is a security consideration, not backup strategy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that Multi-AZ deployment is part of the backup strategy, but in reality it is a high-availability feature that does not affect backup retention, RPO, or backup window performance.
Detailed technical explanation
How to think about this question
The backup retention period controls how long automated backups and transaction logs are retained, enabling PITR within that window. RDS for PostgreSQL uses Write-Ahead Logging (WAL) to capture every change, and these logs are stored in Amazon S3 for the duration of the retention period. The backup window is a configurable period (typically 30 minutes) during which automated backups occur; if this window overlaps with heavy write activity, it can cause increased I/O latency and transaction stalls, making performance impact a critical factor.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Management and Operations — This question tests Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The backup retention period — Option A is correct because the backup retention period directly determines how far back you can perform a point-in-time recovery (PITR) for an RDS for PostgreSQL instance. Amazon RDS stores automated backups and transaction logs for the specified retention period (1 to 35 days), and this period must be aligned with your compliance and operational requirements. Choosing an appropriate retention period is a fundamental factor in defining the backup strategy.
What should I do if I get this DBS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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