- A
Use AWS Database Migration Service (AWS DMS) with full load and change data capture (CDC) to migrate the database.
Why wrong: Incorrect: DMS also reads from the source, causing similar I/O.
- B
Use Data Pump to export to a networked file system (NFS) mount point to offload storage I/O to the network.
Why wrong: Incorrect: NFS still requires writing to the source filesystem, causing I/O.
- C
Use Oracle Data Pump in network_link mode to directly import the data from the source to the target RDS instance without intermediate files.
Correct: This minimizes source I/O as data is transferred directly.
- D
Increase the parallel workers for the Data Pump export job to 8 to speed up the export and reduce the time window.
Why wrong: Incorrect: More parallelism increases I/O, exacerbating source impact.
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.
A company is migrating its on-premises Oracle database to Amazon RDS for Oracle. The database is 2 TB in size and contains both transactional and analytical workloads. The company uses Oracle Data Pump for migration. During the migration, the database specialist notices that the export job on the source database is taking longer than expected and is generating significant I/O, impacting production performance. The company needs to minimize the impact on the source database while completing the migration within a 48-hour window. The source database is currently running on a dedicated server with sufficient CPU and memory. Which course of action should the database specialist take?
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.
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 Oracle Data Pump in network_link mode to directly import the data from the source to the target RDS instance without intermediate files.
Option C is correct because Oracle Data Pump's network_link mode allows the source database to export data directly to the target RDS for Oracle instance over a database link, bypassing the need to write intermediate dump files to disk. This eliminates the I/O overhead on the source server's storage subsystem, which is the primary cause of the production performance impact, while still completing the migration within the 48-hour window.
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 (AWS DMS) with full load and change data capture (CDC) to migrate the database.
Why it's wrong here
Incorrect: DMS also reads from the source, causing similar I/O.
- ✗
Use Data Pump to export to a networked file system (NFS) mount point to offload storage I/O to the network.
Why it's wrong here
Incorrect: NFS still requires writing to the source filesystem, causing I/O.
- ✓
Use Oracle Data Pump in network_link mode to directly import the data from the source to the target RDS instance without intermediate files.
Why this is correct
Correct: This minimizes source I/O as data is transferred directly.
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.
- ✗
Increase the parallel workers for the Data Pump export job to 8 to speed up the export and reduce the time window.
Why it's wrong here
Incorrect: More parallelism increases I/O, exacerbating source impact.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume increasing parallelism (Option D) is always the best way to speed up a Data Pump job, but they overlook that the primary issue is I/O impact on production, not throughput, and that network_link mode eliminates the I/O bottleneck entirely.
Trap categories for this question
Similar concept trap
Incorrect: DMS also reads from the source, causing similar I/O.
Detailed technical explanation
How to think about this question
Oracle Data Pump network_link mode uses a database link to the target RDS instance and performs a direct path export/import without intermediate files, leveraging the source database's memory and CPU but offloading storage I/O. This approach is particularly effective for large databases (e.g., 2 TB) because it avoids the double I/O of writing and then reading dump files, and it can be parallelized across multiple worker processes on the source side without writing to disk. In real-world scenarios, network_link mode is ideal when the source database is on dedicated hardware with ample CPU and memory but constrained storage I/O, as it shifts the bottleneck to the network bandwidth between source and 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.
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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 Oracle Data Pump in network_link mode to directly import the data from the source to the target RDS instance without intermediate files. — Option C is correct because Oracle Data Pump's network_link mode allows the source database to export data directly to the target RDS for Oracle instance over a database link, bypassing the need to write intermediate dump files to disk. This eliminates the I/O overhead on the source server's storage subsystem, which is the primary cause of the production performance impact, while still completing the migration within the 48-hour window.
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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Last reviewed: Jun 11, 2026
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