This question pertains to the Data Concepts and Environments domain, focusing on data repositories. The task is to identify a repository that stores raw, unformatted data.
Data warehouse (Option A): A data warehouse stores structured, processed data in a predefined schema, not raw data.
Data silo (Option B): A data silo is an isolated repository, often structured, not designed for raw data storage.
Data mart (Option C): A data mart is a subset of a data warehouse, also storing structured data.
Data lake (Option D): A data lake stores raw, unformatted data in its original format (structured, semi-structured, or unstructured), making it the correct choice.
The DA0-002 Data Concepts and Environments domain includes understanding "different types of databases and data repositories," and a data lake is designed for raw data storage.
[Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 1.0 Data Concepts and Environments., ==============]
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