- A
Use AWS DMS with parallel load and ongoing replication.
DMS parallel load reduces migration time.
- B
Use Oracle RMAN to create a backup and restore to RDS.
Why wrong: Backup transfer over 100 Mbps may exceed 3 days.
- C
Use Oracle Data Pump with a single export and import.
Why wrong: Single-threaded export/import may be too slow.
- D
Use Oracle GoldenGate for real-time replication.
Why wrong: GoldenGate adds complexity and cost.
Question 284 of 1,730
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 2 TB Oracle database from on-premises to Amazon RDS for Oracle. The network bandwidth is 100 Mbps. The migration must be completed within 3 days. Which approach is MOST efficient?
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 DMS with parallel load and ongoing replication.
AWS DMS with parallel load and ongoing replication is the most efficient approach because it can handle the 2 TB migration within the 3-day window over a 100 Mbps link. At 100 Mbps, the theoretical maximum transfer is about 1.08 TB per day (100 Mbps * 86400 seconds / 8 bits per byte / 1024^4), so 2 TB would take nearly 2 days just for the full load. DMS's parallel load splits the data into multiple tasks, maximizing throughput and reducing the full-load time, while ongoing replication captures changes during the migration, allowing a seamless cutover without downtime.
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 DMS with parallel load and ongoing replication.
Why this is correct
DMS parallel load reduces migration time.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use Oracle RMAN to create a backup and restore to RDS.
Why it's wrong here
Backup transfer over 100 Mbps may exceed 3 days.
- ✗
Use Oracle Data Pump with a single export and import.
Why it's wrong here
Single-threaded export/import may be too slow.
- ✗
Use Oracle GoldenGate for real-time replication.
Why it's wrong here
GoldenGate adds complexity and cost.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume Oracle-native tools like RMAN or Data Pump are always the best for migrations, but they overlook the bandwidth constraint and RDS's lack of direct OS access, making DMS the only viable option for a time-bound, large-scale migration with minimal downtime.
Detailed technical explanation
How to think about this question
AWS DMS uses a task-level parallelism mechanism where it can split the source table data into multiple segments based on primary key ranges or custom predicates, each handled by a separate thread. This allows DMS to achieve higher throughput than single-threaded tools like Data Pump, especially over constrained bandwidth. Additionally, DMS's ongoing replication uses Oracle LogMiner or binary logs to capture changes, ensuring zero data loss during the migration window, which is critical for production databases.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
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Deployment and Migration — study guide chapter
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
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 parallel load and ongoing replication. — AWS DMS with parallel load and ongoing replication is the most efficient approach because it can handle the 2 TB migration within the 3-day window over a 100 Mbps link. At 100 Mbps, the theoretical maximum transfer is about 1.08 TB per day (100 Mbps * 86400 seconds / 8 bits per byte / 1024^4), so 2 TB would take nearly 2 days just for the full load. DMS's parallel load splits the data into multiple tasks, maximizing throughput and reducing the full-load time, while ongoing replication captures changes during the migration, allowing a seamless cutover without downtime.
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
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Last reviewed: Jul 4, 2026
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