Question
Which of the following data repositories stores unformatted data in its original, raw form?
- A. Data warehouse
- B. Data silo
- C. Data mart
- D. Data lake Correct
Explanation
A data lake stores structured, semi-structured and unstructured data in its original raw form, applying a schema only when the data is read. A data warehouse and a data mart hold cleaned, structured data modeled for analysis, with a data mart covering a single subject or department. A data silo is an isolated store that other teams cannot easily access, not a repository type defined by raw storage.
