- A
Replace BFILEs with BLOBs in the source database before migration.
Why wrong: This requires schema changes and downtime.
- B
Use AWS SCT to convert any incompatible schema objects.
SCT helps convert Oracle-specific objects to RDS-compatible ones.
- C
Upload the BFILEs to Amazon S3 and use Oracle Directory objects to reference them.
After migration, BFILEs can be stored in S3 and accessed via directories.
- D
Use AWS CloudEndure Migration to replicate the entire server.
Why wrong: CloudEndure migrates servers, not database objects like BFILEs.
- E
Use AWS DMS with the Oracle source endpoint configured to include the BFILE directory path.
DMS can migrate BFILEs when the directory path is specified.
Question 764 of 1,730
DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 contains large BFILEs stored in a file system. The company needs to migrate the data with minimal downtime and ensure the BFILEs are migrated. Which THREE steps should the company take?
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 SCT to convert any incompatible schema objects.
The correct steps for migrating a 5 TB Oracle database with BFILEs to Amazon RDS for Oracle with minimal downtime are: (B) Use AWS Schema Conversion Tool (SCT) to identify and convert incompatible schema objects, ensuring the target schema is ready. (C) Upload the BFILEs to Amazon S3 and use Oracle Directory objects to reference them in the target database, as BFILEs reference files stored outside the database. (E) Use AWS Database Migration Service (DMS) with the Oracle source endpoint configured to include the BFILE directory path, enabling DMS to migrate the BFILEs during the continuous replication phase, minimizing downtime. Option A (replacing BFILEs with BLOBs) is unnecessary because DMS handles BFILEs natively, and such a change would increase complexity and downtime. Option D (using CloudEndure Migration) is designed for server-level migration, not database-level, and would not be appropriate for this database migration.
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.
- ✗
Replace BFILEs with BLOBs in the source database before migration.
Why it's wrong here
This requires schema changes and downtime.
- ✓
Use AWS SCT to convert any incompatible schema objects.
Why this is correct
SCT helps convert Oracle-specific objects to RDS-compatible ones.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Upload the BFILEs to Amazon S3 and use Oracle Directory objects to reference them.
Why this is correct
After migration, BFILEs can be stored in S3 and accessed via directories.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use AWS CloudEndure Migration to replicate the entire server.
Why it's wrong here
CloudEndure migrates servers, not database objects like BFILEs.
- ✓
Use AWS DMS with the Oracle source endpoint configured to include the BFILE directory path.
Why this is correct
DMS can migrate BFILEs when the directory path is specified.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume BFILEs must be converted to BLOBs before migration (Option A), but AWS DMS can handle BFILEs natively during the migration process, avoiding pre-migration schema changes and reducing downtime.
Detailed technical explanation
How to think about this question
AWS DMS supports BFILE migration by using an Oracle source endpoint with the 'IncludeBfileDirectory' extra connection attribute, which allows DMS to read BFILEs from the file system and store them as BLOBs in the target RDS instance. Alternatively, BFILEs can be uploaded to Amazon S3 and referenced via Oracle Directory objects, but this requires manual scripting and does not leverage DMS's continuous replication for minimal downtime. The combination of SCT for schema conversion and DMS for data migration (including BFILEs) is the standard AWS-recommended approach for heterogeneous migrations.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
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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 SCT to convert any incompatible schema objects. — The correct steps for migrating a 5 TB Oracle database with BFILEs to Amazon RDS for Oracle with minimal downtime are: (B) Use AWS Schema Conversion Tool (SCT) to identify and convert incompatible schema objects, ensuring the target schema is ready. (C) Upload the BFILEs to Amazon S3 and use Oracle Directory objects to reference them in the target database, as BFILEs reference files stored outside the database. (E) Use AWS Database Migration Service (DMS) with the Oracle source endpoint configured to include the BFILE directory path, enabling DMS to migrate the BFILEs during the continuous replication phase, minimizing downtime. Option A (replacing BFILEs with BLOBs) is unnecessary because DMS handles BFILEs natively, and such a change would increase complexity and downtime. Option D (using CloudEndure Migration) is designed for server-level migration, not database-level, and would not be appropriate for this database migration.
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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Last reviewed: Jul 4, 2026
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