The correct answer is to use AWS DMS for full load and ongoing replication, paired with AWS SCT for schema conversion. AWS DMS supports MongoDB as a source and DocumentDB as a target, enabling continuous data synchronization, while AWS SCT handles the critical task of converting MongoDB’s schema structures—such as collections and indexes—into DocumentDB-compatible formats. On the AWS Certified Database Specialty DBS-C01 exam, this pairing tests your understanding of heterogeneous database migrations, where schema transformation and live data replication are distinct but complementary steps. A common trap is confusing MongoDB Atlas (a managed service) with a migration tool, or assuming EBS snapshots work with DMS. Remember the memory tip: “SCT for structure, DMS for data”—SCT transforms the schema first, then DMS moves and replicates the records.
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 self-managed MongoDB database to Amazon DocumentDB (with MongoDB compatibility). Which TWO actions should the company take to ensure a successful migration? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS Schema Conversion Tool (SCT) to convert MongoDB schemas to DocumentDB compatible format.
Options B and D are correct. AWS SCT can convert MongoDB schemas to DocumentDB. AWS DMS supports migration from MongoDB to DocumentDB. Option A is wrong because MongoDB Atlas is a separate service, not used for migration. Option C is wrong because AWS DMS does not support Amazon EBS snapshots. Option E is wrong because DynamoDB is not compatible with MongoDB.
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 Schema Conversion Tool (SCT) to convert MongoDB schemas to DocumentDB compatible format.
Why this is correct
SCT helps convert schemas for compatibility.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS Database Migration Service (DMS) to migrate data from MongoDB Atlas to DocumentDB.
Why it's wrong here
MongoDB Atlas is not the source; the source is self-managed MongoDB.
✓
Use AWS DMS to perform a full load and ongoing replication from MongoDB to DocumentDB.
Why this is correct
DMS supports MongoDB as a source and DocumentDB as a target.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS DMS with an Amazon EBS snapshot as the source for the migration.
Why it's wrong here
DMS does not use EBS snapshots as a source.
✗
Use AWS DMS to migrate data from MongoDB to Amazon DynamoDB, then import into DocumentDB.
Why it's wrong here
DynamoDB is a different database; this adds unnecessary complexity.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 Schema Conversion Tool (SCT) to convert MongoDB schemas to DocumentDB compatible format. — Options B and D are correct. AWS SCT can convert MongoDB schemas to DocumentDB. AWS DMS supports migration from MongoDB to DocumentDB. Option A is wrong because MongoDB Atlas is a separate service, not used for migration. Option C is wrong because AWS DMS does not support Amazon EBS snapshots. Option E is wrong because DynamoDB is not compatible with MongoDB.
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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