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 company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database size is 500 GB. The migration must have minimal downtime. Which AWS service should be used to perform the migration?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Database Migration Service (DMS)
AWS Database Migration Service (DMS) is the correct choice because it supports heterogeneous migrations from Oracle to Amazon RDS for Oracle with minimal downtime. DMS can perform continuous replication using Oracle's change data capture (CDC) via LogMiner or binary reader, allowing the source database to remain operational during the migration. This makes it ideal for a 500 GB database where downtime must be minimized.
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.
✗
AWS Snowball Edge
Why it's wrong here
Snowball is for bulk data transfer, not for ongoing replication.
✓
AWS Database Migration Service (DMS)
Why this is correct
DMS supports Oracle to RDS Oracle migrations with minimal downtime using change data capture.
Related concept
Read the scenario before looking for a memorised answer.
✗
AWS DataSync
Why it's wrong here
DataSync is for file and object storage, not database migration.
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Amazon RDS for Oracle snapshot copy
Why it's wrong here
Snapshot copy is only for existing RDS instances, not for importing from on-premises.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS DataSync or Snowball Edge as viable options for live database migrations, but DataSync is for file/object transfers and Snowball Edge is for offline bulk data movement, neither of which support ongoing change replication or minimal-downtime database migration.
Detailed technical explanation
How to think about this question
DMS uses a replication instance to connect to the source Oracle database via Oracle Net Services (SQL*Net) and to the target RDS for Oracle instance. During the full load phase, DMS performs a bulk copy of the schema and data; then, during CDC, it reads Oracle redo logs (via LogMiner or binary reader) to capture ongoing changes, applying them to the target with transactional consistency. A subtle behavior is that DMS requires supplemental logging to be enabled on the source Oracle database for CDC to work, and it can handle data type conversions automatically (e.g., Oracle NUMBER to RDS NUMBER) but may require custom transformations for unsupported types.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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: AWS Database Migration Service (DMS) — AWS Database Migration Service (DMS) is the correct choice because it supports heterogeneous migrations from Oracle to Amazon RDS for Oracle with minimal downtime. DMS can perform continuous replication using Oracle's change data capture (CDC) via LogMiner or binary reader, allowing the source database to remain operational during the migration. This makes it ideal for a 500 GB database where downtime must be minimized.
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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