DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. 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 a 500 GB Oracle database to Amazon Aurora PostgreSQL. Which THREE steps should be part of the migration plan?
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 to perform a full load and ongoing replication from Oracle to Aurora.
Using SCT for schema conversion is necessary because Oracle and PostgreSQL have different syntax. DMS can migrate data with ongoing replication. After migration, testing is crucial to ensure functionality. Direct Connect is optional. Snowball may be overkill for 500 GB. S3 is used for backup storage but not a required step.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 Snowball to transfer the database files.
Why it's wrong here
For 500 GB, DMS online is simpler and faster than offline transfer.
✗
Set up AWS Direct Connect between on-premises and AWS.
Why it's wrong here
Direct Connect is helpful but not a required step in migration plan.
✓
Use AWS DMS to perform a full load and ongoing replication from Oracle to Aurora.
Why this is correct
DMS supports Oracle as source and Aurora PostgreSQL as target.
Related concept
Static NAT maps one inside address to one outside address.
✓
Use AWS SCT to convert the Oracle schema to PostgreSQL-compatible schema.
Why this is correct
SCT converts schema objects like tables, views, stored procedures.
Related concept
Static NAT maps one inside address to one outside address.
✓
Validate the migrated data and test the application against the new database.
Why this is correct
Testing is essential to ensure correctness and performance.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
Deployment and Migration — This question tests Deployment and Migration — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use AWS DMS to perform a full load and ongoing replication from Oracle to Aurora. — Using SCT for schema conversion is necessary because Oracle and PostgreSQL have different syntax. DMS can migrate data with ongoing replication. After migration, testing is crucial to ensure functionality. Direct Connect is optional. Snowball may be overkill for 500 GB. S3 is used for backup storage but not a required step.
What should I do if I get this DBS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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