DA0-002 Data Concepts and Environments Practice Question
Which of the following is a characteristic of a NoSQL document database like MongoDB?
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
✓
Schema-flexible, JSON-like documents
Document databases store data in flexible, JSON-like documents, allowing schema variability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Schema-flexible, JSON-like documents
Why this is correct
Document databases store data in flexible documents.
- ✗
Data stored in tables with rows and columns
Why it's wrong here
That describes relational databases.
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Strict schema enforcement
Why it's wrong here
NoSQL databases are schema-flexible.
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Support for ACID transactions across multiple documents
Why it's wrong here
Many NoSQL databases relax ACID for scalability.
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