The correct answer is to combine AWS Schema Conversion Tool (SCT) for schema assessment and conversion with AWS Database Migration Service (DMS) for full load and ongoing replication. This pairing directly addresses the need for minimal downtime because SCT first evaluates and converts any incompatible schema objects, such as indexes or stored procedures, ensuring the target RDS environment is ready, while DMS performs an initial full load of the 2 TB database and then continuously replicates ongoing changes from the source to keep them in sync until cutover. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding of online migration strategies versus offline methods; a common trap is selecting AWS Snowball for large datasets, but with a limited maintenance window and the need for minimal downtime, Snowball’s offline transfer would introduce unacceptable delays. Another trap is confusing Direct Connect as a migration strategy rather than a network optimization. Remember the memory tip: “SCT for the structure, DMS for the data stream” — if you need near-zero downtime, always pair schema conversion with continuous replication.
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 SQL Server database to Amazon RDS for SQL Server. They have a limited maintenance window and need to minimize downtime. Which TWO strategies should they combine?
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 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.
Using DMS for full load and ongoing replication minimizes downtime. AWS SCT is needed to convert schema if there are incompatibilities. Snowball is for offline transfer, but with 2 TB and limited time, DMS online is better. Direct Connect improves network but is not a migration strategy. CloudEndure is for server migration.
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 DMS to perform a full load and ongoing replication.
Why this is correct
DMS enables near-zero downtime migration.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS Direct Connect to increase bandwidth.
Why it's wrong here
Direct Connect is not a migration strategy itself.
✓
Use AWS SCT to convert the schema and assess compatibility.
Why this is correct
SCT ensures schema compatibility before migration.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS CloudEndure Migration.
Why it's wrong here
CloudEndure is for server migration, not database migration.
✗
Use AWS Snowball to transfer a backup offline.
Why it's wrong here
Offline transfer may not fit limited maintenance window.
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 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.
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. — Using DMS for full load and ongoing replication minimizes downtime. AWS SCT is needed to convert schema if there are incompatibilities. Snowball is for offline transfer, but with 2 TB and limited time, DMS online is better. Direct Connect improves network but is not a migration strategy. CloudEndure is for server migration.
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.
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?
Static NAT maps one inside address to one outside address.
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Question Discussion
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