What is the most suitable technology for providing a specific department with a dedicated subset of data from a data warehouse?

What is the most suitable technology for providing a specific department with a dedicated subset of data from a data warehouse?

• A. Data lake
• B. Data mart
• C. Data repository
• D. Data silo

Answer: (B)

A data mart is a subset of a data warehouse that is specifically designed to serve the needs of a particular department or business unit within an organization. By focusing on a specific subject area, such as sales or finance, data marts allow departments to access relevant data quickly and efficiently without having to sift through the entire data warehouse. This targeted approach not only enhances performance by reducing data volume but also ensures that the data is tailored to the reporting and analytical needs of the department.

On the other hand, a data lake is a storage repository that can hold vast amounts of structured and unstructured data, but is not specifically tailored for a single department, making it less suitable for providing a dedicated subset. A data repository is a broader term that can encompass various forms of data storage and management, lacking the specific focus that a data mart provides. A data silo refers to isolated data stores that are not easily shared or integrated with other systems, which would hinder access to comprehensive data rather than provide a dedicated subset.