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Database Management Systems

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Questions and Answers

What is the primary purpose of a Data Dictionary?

To improve data redundancy in a database
To provide a detailed description of all the data used in a database (correct)
To store data in a database
To manage concurrent users in a database

What is the role of a Database Administrator (DBA)?

To link databases to the Internet
To plan, design, create, operate, secure, monitor, and maintain databases (correct)
To define and implement data standards and data definitions
To develop data warehouses and data mining tools

What is the main benefit of linking databases to the Internet?

To reduce database cost
To allow people to access and manipulate multiple databases simultaneously through the Internet (correct)
To improve database performance
To increase data redundancy

What is data mining?

A data-analysis tool that involves the automated discovery of patterns and relationships (A) Signup and view all the answers

What is a data warehouse?

A database that collects business information from many sources in the enterprise (B) Signup and view all the answers

What is the role of a data administrator?

To define and implement consistent principles for various data issues (D) Signup and view all the answers

What is the function of a primary key in a relational database?

To ensure each record is unique in some way (B) Signup and view all the answers

What is the purpose of Data Definition Language (DDL)?

To define and describe data and relationships in a database (B) Signup and view all the answers

What is a field in a relational database?

A specific item of data stored about an entity (D) Signup and view all the answers

What is the purpose of a record in a relational database?

To collect all the data about one specific entity (C) Signup and view all the answers

What is Structured Query Language (SQL) used for?

To provide a standardized method for retrieving information from databases (B) Signup and view all the answers

What is a table in a relational database?

A collection of records (B) Signup and view all the answers

What is the primary function of Online Analytical Processing (OLAP)?

To analyze large data sets in real-time (C) Signup and view all the answers

What is a key feature of a distributed database?

Data is split across multiple smaller databases (B) Signup and view all the answers

What is a data cube?

A multi-dimensional view of data (B) Signup and view all the answers

What is the purpose of data replication?

To improve data accessibility (D) Signup and view all the answers

What is a key benefit of using distributed databases?

More flexibility in database organization and use (D) Signup and view all the answers

What is the primary advantage of using OLAP software?

It enables real-time data analysis (A) Signup and view all the answers

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