Question 1

What is a data warehouse?

Accepted Answer

A large, centralized repository for data from various sources

Answer

A collection of spreadsheets

Answer

A network of interconnected computers

Answer

A small database for storing personal files

Answer

A tool for creating and editing videos

Question 2

What is the purpose of a data warehouse?

Accepted Answer

To provide a single source of truth for decision-making processes

Answer

To sell data to other organizations

Answer

To store data in a variety of formats

Answer

To automate data entry processes

Answer

To create visualizations and dashboards

Question 3

Which of the following is NOT a characteristic of data warehousing?

Accepted Answer

Real-time data processing

Answer

High-performance querying

Answer

Historical data storage

Answer

Aggregation and summarization

Answer

Data transformation and cleaning

Question 4

What is ETL?

Accepted Answer

A process for extracting, transforming, and loading data into a data warehouse

Answer

A programming language for data analysis

Answer

A type of database model

Answer

A method for encrypting data

Answer

A tool for creating data visualizations

Question 5

What is meant by the term 'dimension' in data warehousing?

Accepted Answer

A category or attribute used to group and filter data

Answer

The number of columns in a table

Answer

The physical size of a database

Answer

The level of detail in a report

Answer

A measure of data quality

Question 6

What is a 'fact table' in a data warehouse?

Accepted Answer

A table that contains numerical data, usually used for aggregation and analysis

Answer

A table used for logging user actions

Answer

A table used for storing metadata

Answer

A table used for storing text data

Answer

A table used for storing data backups

Question 7

What is OLAP?

Accepted Answer

Online Analytical Processing, a technology for multidimensional analysis of data

Answer

Optical Line Amplifier

Answer

Organic Light-Emitting Polymer

Answer

Object Linking and Embedding Protocol

Answer

Online Learning and Assessment Platform

Question 8

What is meant by the term 'data mart'?

Accepted Answer

A subset of a larger data warehouse, focused on a specific business area or department

Answer

A type of data cleaning algorithm

Answer

A type of database model used for storing large amounts of data

Answer

A tool for creating data visualizations

Answer

A method for data encryption

Question 9

What is meant by the term 'data mining'?

Accepted Answer

The process of discovering patterns and insights in large datasets

Answer

The process of querying a database for specific information

Answer

The process of loading data into a data warehouse

Answer

The process of transforming data into a different format

Answer

The process of encrypting data for security purposes

Question 10

Which of the following is NOT a benefit of data warehousing?

Accepted Answer

Reduced need for data governance and security

Answer

More efficient reporting and analysis

Answer

Improved data quality

Answer

Increased scalability and flexibility

Answer

Better decision-making processes

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