The answer is the acceptable downtime window for the application and the ability to modify the schema. These two factors are critical because the downtime window dictates whether you can use an offline migration, which is faster but requires the database to be unavailable, or an online migration using AWS DMS for near-zero downtime. Meanwhile, the ability to modify the schema determines if you need the AWS Schema Conversion Tool (SCT) to transform the database objects for compatibility with RDS, as SCT handles schema and code changes that may be required. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your understanding of migration planning constraints, often appearing as a trap where candidates mistakenly focus on source version or user count instead of operational and structural requirements. Remember that SQL Server Agent jobs can be migrated manually, and version compatibility is a prerequisite, not a choice factor. A useful memory tip is "Downtime and Schema" — the two D's that drive your migration approach.
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 planning to migrate a 1 TB SQL Server database to Amazon RDS for SQL Server. Which TWO factors should be considered when choosing the migration approach?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The need to modify the database schema for compatibility
Options A and C are correct. The acceptable downtime window determines whether offline or online migration is used, and the ability to modify the schema may require SCT. Option B is wrong because SQL Server Agent jobs can be migrated. Option D is wrong because the source SQL Server version affects compatibility. Option E is wrong because the number of concurrent users is not a primary factor.
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.
✗
The number of concurrent users accessing the database
Why it's wrong here
Concurrent users affect performance but not the migration approach.
✓
The need to modify the database schema for compatibility
Why this is correct
Schema changes may be required and SCT can assist.
Related concept
Static NAT maps one inside address to one outside address.
✗
Whether the database uses SQL Server Agent jobs
Why it's wrong here
SQL Server Agent jobs can be migrated to RDS using SCT or recreated.
✓
The acceptable downtime window for the application
Why this is correct
Determines whether offline (snapshot) or online (CDC) migration is feasible.
Related concept
Static NAT maps one inside address to one outside address.
✗
The version of the source SQL Server instance
Why it's wrong here
Version affects compatibility but not the overall migration approach choice.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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: The need to modify the database schema for compatibility — Options A and C are correct. The acceptable downtime window determines whether offline or online migration is used, and the ability to modify the schema may require SCT. Option B is wrong because SQL Server Agent jobs can be migrated. Option D is wrong because the source SQL Server version affects compatibility. Option E is wrong because the number of concurrent users is not a primary factor.
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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