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Question 833 of 1,730

Management and Operations →mediumMultiple ChoiceObjective-mapped

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 specialist is managing an Amazon RDS for Oracle DB instance. The instance has a large amount of data and the specialist needs to migrate it to a new instance in a different AWS Region. Which method would minimize downtime and be the most efficient?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

A
Use AWS Database Migration Service (DMS) with ongoing replication to migrate to the target instance.
DMS supports minimal downtime with ongoing replication.
B
Export the database to Amazon S3 using Oracle Data Pump, then import into the new instance.
Why wrong: This method causes significant downtime and is not efficient for large data.
C
Create a cross-region read replica and promote it.
Why wrong: Cross-region read replicas are not supported for Oracle RDS.
D
Take a full backup using Oracle RMAN, copy the backup files to the target region, and restore.
Why wrong: RMAN backup/restore is not natively integrated across regions.

Full breakdown with real-world context →

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 AWS Database Migration Service (DMS) with ongoing replication to migrate to the target instance.

AWS DMS with ongoing replication (change data capture) allows you to perform a full load of the existing Oracle database to the target instance in the new region, and then continuously replicate changes from the source until you cut over. This minimizes downtime because you can keep the source database fully operational during the migration and only stop it for a brief period during the final switchover. It is the most efficient method for cross-region migrations because it handles schema conversion, data validation, and ongoing synchronization automatically.

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 AWS Database Migration Service (DMS) with ongoing replication to migrate to the target instance.
Why this is correct
DMS supports minimal downtime with ongoing replication.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Export the database to Amazon S3 using Oracle Data Pump, then import into the new instance.
Why it's wrong here
This method causes significant downtime and is not efficient for large data.
✗
Create a cross-region read replica and promote it.
Why it's wrong here
Cross-region read replicas are not supported for Oracle RDS.
✗
Take a full backup using Oracle RMAN, copy the backup files to the target region, and restore.
Why it's wrong here
RMAN backup/restore is not natively integrated across regions.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often assume cross-region read replicas are available for all RDS engines, but Amazon RDS for Oracle does not support cross-region read replicas, making Option C an invalid choice despite its appeal for minimizing downtime.

Detailed technical explanation

How to think about this question

AWS DMS uses Oracle LogMiner or Oracle Binary Reader to capture changes from the source database's redo logs for ongoing replication, enabling near-zero downtime migrations. The service can automatically create the target schema and tables using its built-in schema conversion, or you can use AWS Schema Conversion Tool (SCT) for complex transformations. In a real-world scenario, you would first perform a full load, then enable CDC, and finally stop writes to the source, apply any remaining changes, and redirect traffic to the target.

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.

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FAQ

Questions learners often ask

What does this DBS-C01 question test?

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: Use AWS Database Migration Service (DMS) with ongoing replication to migrate to the target instance. — AWS DMS with ongoing replication (change data capture) allows you to perform a full load of the existing Oracle database to the target instance in the new region, and then continuously replicate changes from the source until you cut over. This minimizes downtime because you can keep the source database fully operational during the migration and only stop it for a brief period during the final switchover. It is the most efficient method for cross-region migrations because it handles schema conversion, data validation, and ongoing synchronization automatically.

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.

Are there clue words in this question I should notice?

Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.