DA0-002 Question #63: Real Exam Question with Answer & Explanation

The correct answer is A: Data lake. A data lake is a centralized repository designed to store vast amounts of raw data in its native format, regardless of structure or source. This allows for the storage of unaltered data before any transformations or structuring.

Data Concepts and Environments

Question

Which of the following data repositories stores unaltered data?

Options

AData lake
BData warehouse
CData table
DData factory

Explanation

A data lake is a centralized repository designed to store vast amounts of raw data in its native format, regardless of structure or source. This allows for the storage of unaltered data before any transformations or structuring.

Common mistakes.

B. A data warehouse stores structured, processed, and transformed data that has been cleaned and organized for analytical purposes, meaning it is not unaltered.
C. A data table is a structural component within a database, and while it can hold data, it is not a distinct type of repository known specifically for preserving data in an unaltered state like a data lake.
D. A data factory is a data integration and orchestration service used to move and transform data, but it is not a repository for storing data itself.

Concept tested. Characteristics of data lake vs. data warehouse

Reference. https://learn.microsoft.com/en-us/azure/architecture/data-guide/relational-data/data-lake

Topics

#Data Lake#Data Storage#Raw Data#Data Repositories

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