Data and Information Basics

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Questions and Answers

What is the primary difference between data and information?

Data depends on information, while information doesn't depend on data
Information is stored in data warehouses, while data is not
Data is raw material without specific meaning, while information is a group of data with logical meaning (correct)
Data is measured in meaningful units, while information is measured in bits and bytes

What is the function of a data warehouse?

Storing consolidated data from multiple locations for analytical needs (correct)
Organizing data for operational needs
Processing data for transactional systems
Storing raw data for immediate retrieval

What does it mean for a data warehouse to be time variant?

The data warehouse can only be accessed at certain times
The data warehouse is synchronized with real-time data
Historical data is kept in the data warehouse (correct)
The data warehouse stores only current data

How does a data warehouse differ from a relational database?

A data warehouse is designed for analytical needs, while a relational database is not (B) Signup and view all the answers

What does it mean for a data warehouse to be subject-oriented?

It can be used to analyze a particular subject area such as 'Sales' (A) Signup and view all the answers

Match the following terms with their descriptions:

Data = Individual unit containing raw materials Information = Group of data carrying logical meaning Data warehouse = Relational database designed for analytical needs OLAP = Functioning basis of a data warehouse Signup and view all the answers

Match the following characteristics with their definitions:

Subject-oriented = Used to analyze a particular subject area Integrated = Integrates data from multiple sources Time Variant = Keeps historical data Non-volatile = Supports management's decision-making process Signup and view all the answers

Match the following terms with their meanings:

Data warehousing = Organizing & storing data for efficient retrieval Bits and bytes = Measurement of data Meaningful units = Measurement of information OLAP = Online Analytical Processing Signup and view all the answers

Match the following statements with their correct definitions:

Data and Information = Relationship where information depends on data Data Warehouse Characteristics = Subject-oriented, integrated, time variant and non-volatile collection of data Data Warehouse Process = Act of transforming data into information Information Measurement = Measured in meaningful units like time, quantity, etc. Signup and view all the answers

Match the following terms with their primary usage:

Bits and bytes = Measurement of data Data warehousing = Efficient and insightful retrieval of stored data OLAP = Online Analytical Processing Non-volatile = Collection of data in support of management’s decision making process Signup and view all the answers