Which of the following data repositories stores unstructured and structured data?

Data store is a general term and doesn't specifically imply storage of both unstructured and structured data in a raw format like a data lake.

A data silo refers to data isolated within one department or system, not a type of repository for mixed data types.

A data mart is a subset of a data warehouse, typically focused on a specific department or business function, storing only structured, refined data.

A data lake is designed to store data in its raw, native format, which includes structured data like relational databases, semi-structured data like CSVs/JSONs, and unstructured data like documents or images, without requiring a predefined schema. This flexibility makes it ideal for handling diverse data types before analysis.