The answer is using mongodump and mongorestore for the most efficient initial data load during a MongoDB to DocumentDB migration. These native MongoDB tools perform a logical backup by exporting BSON data from the source and then restoring it directly into DocumentDB, which is fully compatible with the format. This method is far more efficient for a 500 GB dataset than AWS DMS, which adds overhead from schema conversion and change data capture, making it better suited for ongoing replication rather than bulk initial loads. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your understanding of migration tooling trade-offs—specifically that native database utilities outperform managed services for one-time, large-volume transfers. A common trap is confusing mongodump with the --out parameter (which only creates files) or assuming snapshot-based methods apply to self-managed instances. Memory tip: think "dump and restore, not DMS, for the first pour."
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 developer is migrating a self-managed MongoDB database to Amazon DocumentDB. The database contains 500 GB of data. What is the most efficient method to perform the initial data load?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use mongodump and mongorestore
Option B is correct because mongodump and mongorestore are the standard tools for logical backup and restore in MongoDB, and they are compatible with DocumentDB. Option A is wrong because AWS DMS supports MongoDB as a source but is less efficient for large initial loads compared to native tools. Option C is wrong because creating a snapshot of a self-managed database is not applicable to DocumentDB. Option D is wrong because mongodump with the --out parameter does not load data into DocumentDB; it creates dump files.
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.
✗
Take a file system snapshot and restore to DocumentDB
Why it's wrong here
File system snapshots are not directly restorable to DocumentDB.
✓
Use mongodump and mongorestore
Why this is correct
These native tools are efficient and compatible with DocumentDB.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS DMS with full load
Why it's wrong here
DMS is less efficient for large initial loads and may require additional configuration.
✗
Use mongodump with --out and then import using mongoimport
Why it's wrong here
mongoimport is for importing data, but mongodump output is in BSON format, not suitable for mongoimport.
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.
Trap categories for this question
Command / output trap
mongoimport is for importing data, but mongodump output is in BSON format, not suitable for mongoimport.
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 mongodump and mongorestore — Option B is correct because mongodump and mongorestore are the standard tools for logical backup and restore in MongoDB, and they are compatible with DocumentDB. Option A is wrong because AWS DMS supports MongoDB as a source but is less efficient for large initial loads compared to native tools. Option C is wrong because creating a snapshot of a self-managed database is not applicable to DocumentDB. Option D is wrong because mongodump with the --out parameter does not load data into DocumentDB; it creates dump files.
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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