DA0-002 Data Concepts and Environments Practice Question
Which of the following best describes a data mart?
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
✓
A subject-specific subset of a data warehouse
A data mart is a subject-specific subset of a data warehouse, focused on a particular department or function.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A repository for raw, unprocessed data
Why it's wrong here
That describes a data lake.
- ✗
An OLTP system for transaction processing
Why it's wrong here
OLTP systems are transactional databases.
- ✓
A subject-specific subset of a data warehouse
Why this is correct
Data marts are subsets of data warehouses.
- ✗
A tool for extract, transform, and load processes
Why it's wrong here
ETL is a process, not a data mart.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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