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Data Warehousing and Management

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Questions and Answers

What is the primary advantage of cloud-based data warehouse architectures?

They are easier to set up than traditional data warehouses
They can store large amounts of data
They can perform complex analytical queries much faster (correct)
They are more secure than traditional data warehouses

What is the process of extracting data from a source system, transforming it, and then loading it into a data warehouse?

ETL (extract, transform, load) (correct)
BI (business intelligence)
MPP (massively parallel processing)
ELT (extract, load, transform)

What is the primary purpose of a data warehouse?

To perform complex analytical queries
To provide a single depot for all data
To integrate and store data from internal and external sources (correct)
To store data in its raw format

What is an example of semi-structured data that can be stored in a data lake?

CSV files (B) Signup and view all the answers

What is the advantage of using a cloud platform to host a data lake?

It is a scalable and flexible storage solution (B) Signup and view all the answers

What is the main difference between a data warehouse and a data lake?

A data warehouse stores data in a transformed format, while a data lake stores it in its raw format (C) Signup and view all the answers

What is the process of extracting data from a source system, loading it into a central repository, and then transforming it?

ELT (extract, load, transform) (C) Signup and view all the answers

What is an example of unstructured data that can be stored in a data lake?

Emails (A) Signup and view all the answers

What is the primary purpose of business intelligence (BI) tools?

To access, mine, and report on data (D) Signup and view all the answers

What are two popular cloud-based data warehouses mentioned in the text?

Amazon Redshift and Google BigQuery (C) Signup and view all the answers

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