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Introduction to Data Collection and Warehousing Concepts

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Questions and Answers

What is the primary purpose of databases according to the text?

To enable computers to function properly
To provide instructions for computer operations
To store temporary data used by applications
To organize and store data for future access (correct)

How are files and databases different in terms of data storage?

Files and databases both store data in the computer's memory
Files are used for graphic data, while databases are used for text data
Files store temporary data, while databases store permanent data
Files store data required for application use, while databases store data for future access (correct)

What role does Database Management Software (DBMS) play in database management?

Managing database creation, tables, and data security (correct)
Creating applications for database use
Storing temporary data used by programmers
Ensuring data is only accessible by web developers

What is the purpose of an e-tag in the context of the text?

To track and identify different items using radio frequency (A) Signup and view all the answers

How do electronic tags (tags) transmit information in the context of the text?

By emitting a radio frequency to a tag reader or vice versa (A) Signup and view all the answers

What is the main advantage of using RFID technology mentioned in the text?

Tracking and identifying items with tiny chips (B) Signup and view all the answers

In what way have web forms changed the way business is conducted according to the text?

By limiting errors in user input and favoring online documentation (B) Signup and view all the answers

What was the main goal of SANRAL's electronic toll (e-toll) system in Gauteng, as mentioned in the text?

To fund a highway improvement project through toll collection (C) Signup and view all the answers

What is the primary reason for normalizing a database?

To efficiently organize data (C) Signup and view all the answers

Why is denormalized data in a flat-file database problematic?

It leads to anomalies (D) Signup and view all the answers

What does Edgar F Codd consider as the main goal of normalization?

Efficiently organizing data (A) Signup and view all the answers

How does a poorly planned flat-file database affect data handling as it grows?

Causes difficulties in handling data (B) Signup and view all the answers

What makes handling data increasingly difficult in a poorly planned database?

Introduction of anomalies (A) Signup and view all the answers

What is the significance of a primary key in a database?

It ensures that there are no duplicates in the records. (D) Signup and view all the answers

In a relational database, what is the role of multiple connected tables?

To group related fields together based on unique identifiers. (C) Signup and view all the answers

How do fields differ from records in a database?

Fields group related information, while records store individual data entries. (A) Signup and view all the answers

Why do database creators usually create a new field specifically for the primary key?

To ensure that there are no duplicates in the records. (A) Signup and view all the answers

What is the purpose of having a compulsory field called a primary key in each table of a database?

To hold a unique identifier for each record to refer to a specific entry. (C) Signup and view all the answers

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