DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. 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 a 5 TB Oracle database to Amazon RDS for Oracle. The database has several large tables with LOB columns. The migration must have minimal downtime. Which approach should be taken?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS DMS with LOB support and ongoing replication from Oracle to RDS.
AWS DMS with LOB support and ongoing replication (change data capture, CDC) is the correct approach because it enables a near-zero downtime migration by continuously replicating changes from the source Oracle database to Amazon RDS for Oracle after an initial full load. DMS handles large LOB columns efficiently using its 'Full LOB mode' or 'Limited LOB mode' settings, which are critical for tables with LOB data. The combination of full load + CDC ensures minimal downtime, as the target remains synchronized until cutover.
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 Oracle GoldenGate to replicate data to RDS.
Why it's wrong here
While GoldenGate can work, it requires additional licensing and complexity; AWS DMS is the recommended service.
✓
Use AWS DMS with LOB support and ongoing replication from Oracle to RDS.
Why this is correct
AWS DMS supports LOBs and can replicate changes continuously, minimizing downtime.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Oracle Data Pump to export the database and import into RDS.
Why it's wrong here
Data Pump is an offline method that would cause significant downtime for a 5 TB database.
✗
Copy the database files to Amazon S3 and use the rdsadmin.rds_restore_from_s3 procedure.
Why it's wrong here
RDS for Oracle does not support restoring from S3 directly.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose Oracle GoldenGate (Option A) because it is a well-known replication tool, but the exam expects you to recognize that AWS DMS is the native, fully managed service designed for minimal-downtime migrations to RDS, and GoldenGate introduces unnecessary complexity and cost.
Detailed technical explanation
How to think about this question
AWS DMS uses Oracle LogMiner or Oracle Binary Reader to capture changes from the source redo logs for CDC, which allows continuous replication without significant impact on the source. For LOB columns, DMS by default uses 'Full LOB mode' which loads entire LOBs into memory, but for very large LOBs, 'Limited LOB mode' can be configured to chunk the data; the 'Max LOB size' parameter must be set appropriately to avoid truncation or performance issues. In real-world scenarios, DMS can handle multi-terabyte databases with LOBs by using task settings like 'ParallelLoadThreads' and 'BatchApplyEnabled' to optimize throughput and reduce latency.
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.
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS DMS with LOB support and ongoing replication from Oracle to RDS. — AWS DMS with LOB support and ongoing replication (change data capture, CDC) is the correct approach because it enables a near-zero downtime migration by continuously replicating changes from the source Oracle database to Amazon RDS for Oracle after an initial full load. DMS handles large LOB columns efficiently using its 'Full LOB mode' or 'Limited LOB mode' settings, which are critical for tables with LOB data. The combination of full load + CDC ensures minimal downtime, as the target remains synchronized until cutover.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.