Data Warehousing Chapter 1

What was the primary purpose of organizations in the early 1990s?

To design dimensional data models
To implement ETL processes
To support decision-making processes (correct)
To develop OLAP operations

What is the main difference between a regular database and a data warehouse?

Data security measures
Data storage capacity
Design focus for daily business operations versus analytical purposes (correct)
Data processing speed

What is OLTP?

Offline Data Processing
Online Transactional Processing (correct)
Online Data Warehousing
Online Analytics Processing

What is the primary goal of an ETL process?

To extract, transform, and load data (D) Signup and view all the answers

When did organizations recognize the need for sophisticated data analysis?

In the early 1990s (D) Signup and view all the answers

What is the primary focus of traditional operational databases?

Daily business operations (B) Signup and view all the answers

What is the primary benefit of using an OLAP cube in data analysis?

To analyze complex data more efficiently (A) Signup and view all the answers

Which of the following is an example of a dimension that can be merged in a multidimensional cube?

Location (B) Signup and view all the answers

What can be achieved by combining the three dimensions (Time, Location, and Product) in a multidimensional cube?

Finding answers to questions about business sales operations based on product, time, and location at the same time (D) Signup and view all the answers

What is a key advantage of using a multidimensional chart?

It becomes easier to interpret and compare data (B) Signup and view all the answers

What can be observed from the multidimensional chart example?

Sales are strongest in France across all categories of products (B) Signup and view all the answers

What is a result of using a multidimensional cube?

A more efficient method of providing a more meaningful view of information (C) Signup and view all the answers

What is the main purpose of the drill-down operation in a multidimensional cube model?

To drill down into a more specific area of data (D) Signup and view all the answers

What is the result of applying the dice operation to a multidimensional cube?

Selecting a subset of data based on specific conditions (B) Signup and view all the answers

What is the benefit of a hierarchical data structure in a multidimensional cube model?

It allows both drill-down and roll-up operations (C) Signup and view all the answers

What is the main advantage of using OLAP operations in a data warehouse?

To provide fast and flexible access to data (A) Signup and view all the answers

What is a characteristic of structured data?

It is presented in a well-defined data model (C) Signup and view all the answers

What is the purpose of the roll-up operation in a multidimensional cube model?

To move into a higher level of data (D) Signup and view all the answers

What type of data is typically used in a data warehouse?

Structured data (A) Signup and view all the answers

What is the main focus of OLAP operations in a data warehouse?

To provide fast and flexible access to data (C) Signup and view all the answers

What is an example of semi-structured data?

An email message (C) Signup and view all the answers

What is a characteristic of unstructured data?

It contains several different kinds of data (A) Signup and view all the answers

What type of database model is commonly used for structured data?

Relational database model (D) Signup and view all the answers

What is a benefit of using structured data?

It is easier to gain insights and uncover answers to specific questions (B) Signup and view all the answers

What is the primary function of metadata in a data warehouse?

To manage and track changes within source systems (B) Signup and view all the answers

What is the purpose of a data mart?

To meet the demands of a specific group of users (C) Signup and view all the answers

What is stored in a data mart?

A subset of data focused on a particular part of the business (B) Signup and view all the answers

What is performed in the OLAP tier of the data warehouse architecture?

Data analytics (D) Signup and view all the answers

What is an example of metadata in the Global Super Stores dataset?

Information about the data source and creation time (C) Signup and view all the answers

What can data analysts do with the data in the Global Super Stores repository?

Perform data analytics using different techniques (C) Signup and view all the answers