- A
Take a file system snapshot and restore to DocumentDB
Why wrong: File system snapshots are not directly restorable to DocumentDB.
- B
Use mongodump and mongorestore
These native tools are efficient and compatible with DocumentDB.
- C
Use AWS DMS with full load
Why wrong: DMS is less efficient for large initial loads and may require additional configuration.
- D
Use mongodump with --out and then import using mongoimport
Why wrong: mongoimport is for importing data, but mongodump output is in BSON format, not suitable for mongoimport.
Question 676 of 1,730
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 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 choices
Why each option matters
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 native MongoDB tools designed for logical backups and restores, and Amazon DocumentDB is wire-protocol compatible with MongoDB 3.6 and 4.0. This method efficiently exports the 500 GB dataset as BSON files and imports them directly into DocumentDB, preserving indexes and data types without the overhead of file-system-level differences.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
Read the scenario before looking for a memorised answer.
- ✗
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: answer the scenario, not the keyword
The trap here is that candidates confuse file system snapshots (Option A) with database-native snapshots, or assume AWS DMS (Option C) is the universal migration tool, when in fact DocumentDB's MongoDB compatibility requires MongoDB-native tools for the most efficient and reliable initial load.
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
Under the hood, mongodump creates a binary BSON dump that preserves the exact document structure, including indexes and collection metadata, which mongorestore can replay efficiently in parallel. DocumentDB's wire-protocol compatibility means it accepts the same MongoDB client commands, but it does not support the full MongoDB aggregation pipeline or all index types (e.g., sparse indexes), so post-migration validation is critical. In real-world scenarios, for a 500 GB database, using mongodump with --numParallelCollections and mongorestore with --writeConcern=0 can significantly reduce migration time.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
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 native MongoDB tools designed for logical backups and restores, and Amazon DocumentDB is wire-protocol compatible with MongoDB 3.6 and 4.0. This method efficiently exports the 500 GB dataset as BSON files and imports them directly into DocumentDB, preserving indexes and data types without the overhead of file-system-level differences.
What should I do if I get this DBS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
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