The answer is Amazon RDS automated backups. This is the correct choice because RDS automated backups are a native, built-in feature that automatically performs daily snapshots of your DB instance during a defined backup window and retains transaction logs for point-in-time recovery, with a configurable retention period of 1 to 35 days—so setting it to 30 days directly satisfies the requirement without any additional services or scripting. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your understanding of RDS’s default backup capabilities versus manual snapshots or third-party tools; a common trap is assuming you need AWS Backup or Lambda scripts for daily automation, but RDS automated backups handle this natively. Remember the memory tip: “RDS does the daily grind, just set your retention time.”
DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 database administrator needs to automate the backup process for an Amazon RDS for MySQL DB instance. The backups must be retained for 30 days and should be taken daily. Which AWS service should be used to implement this automation?
Why wrong: S3 lifecycle policies are for managing objects in S3, not for database backups.
B
AWS Backup
Why wrong: AWS Backup is a centralized backup service, but for a simple daily backup with 30-day retention, RDS automated backups are more straightforward.
C
AWS Lambda with custom scripts
Why wrong: While possible, it's unnecessary complexity when RDS automated backups provide the required functionality.
D
Amazon RDS automated backups
RDS automated backups can be enabled with a retention period of up to 35 days and perform daily backups automatically.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon RDS automated backups
Amazon RDS automated backups are the native, built-in mechanism for backing up RDS DB instances. They automatically take daily snapshots during the backup window and retain transaction logs for point-in-time recovery. By default, the retention period can be set from 1 to 35 days, so configuring it to 30 days meets the requirement without any additional services or custom scripting.
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.
✗
Amazon S3 lifecycle policies
Why it's wrong here
S3 lifecycle policies are for managing objects in S3, not for database backups.
✗
AWS Backup
Why it's wrong here
AWS Backup is a centralized backup service, but for a simple daily backup with 30-day retention, RDS automated backups are more straightforward.
✗
AWS Lambda with custom scripts
Why it's wrong here
While possible, it's unnecessary complexity when RDS automated backups provide the required functionality.
✓
Amazon RDS automated backups
Why this is correct
RDS automated backups can be enabled with a retention period of up to 35 days and perform daily backups automatically.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may over-engineer the solution by choosing AWS Backup or Lambda, not realizing that RDS automated backups natively support daily backups with a configurable retention period up to 35 days, making them the simplest and most appropriate choice.
Detailed technical explanation
How to think about this question
RDS automated backups use a combination of daily full snapshots and transaction log backups (binlogs for MySQL) to enable point-in-time recovery to any second within the retention period. The backup data is stored in S3 but managed entirely by RDS, and the retention period is set via the BackupRetentionPeriod parameter in the DB instance configuration. A common nuance is that automated backups are only available for InnoDB storage engine in MySQL, as MyISAM tables do not support crash recovery and will not be backed up consistently.
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: Amazon RDS automated backups — Amazon RDS automated backups are the native, built-in mechanism for backing up RDS DB instances. They automatically take daily snapshots during the backup window and retain transaction logs for point-in-time recovery. By default, the retention period can be set from 1 to 35 days, so configuring it to 30 days meets the requirement without any additional services or custom scripting.
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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