DA0-002 Data Concepts and Environments Practice Question
An organization uses a data warehouse for analytics. The data team wants to load data from source systems into the warehouse. They choose to load raw data first and then perform transformations within the warehouse. Which approach are they using?
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
✓
ELT
ELT (Extract, Load, Transform) involves extracting data, loading it into the target system (e.g., data warehouse), and then transforming it there. This is common with modern cloud warehouses like Snowflake or BigQuery that handle transformations efficiently.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
ELT
Why this is correct
ELT loads raw data first, then transforms it within the warehouse.
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Data lake
Why it's wrong here
A data lake stores raw data but is not a process; ELT is the process.
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Data mart
Why it's wrong here
A data mart is a subset of a data warehouse, not a process.
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ETL
Why it's wrong here
ETL transforms data before loading into the target, not after.
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