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Database Concepts

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Questions and Answers

What is the purpose of normalizing a database?

To efficiently organize data and prevent anomalies (correct)
To make data inconsistent and hard to manage
To increase data integrity and make anomalies occur more frequently
To make data difficult to convert into human-readable format

How does a poorly planned flat-file database contribute to data problems?

By making the data inconsistent and easy to manage
By preventing anomalies and making data integrity easier to maintain
By organizing data in an efficient manner
By creating difficulties when inserting, deleting, or modifying records (correct)

What type of structures do computers use to organize data?

Data structures that make information unreadable
Data structures that increase anomalies in databases
Data structures that convert data into human-readable format
Data structures that describe a specific sequence for data organization (correct)

What happens when processing data is complete in a computer?

Data is converted into human-readable format (C) Signup and view all the answers

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

It makes handling the data increasingly difficult as the database grows (A) Signup and view all the answers

Who stated the goals of normalization for relational databases?

Edgar F Codd (A) Signup and view all the answers

What is a field in a database?

A single bit of information about a person or item (A) Signup and view all the answers

Which term is used to refer to a group of related fields about an item or person captured in a table?

Record (D) Signup and view all the answers

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

To contain a unique identifier for each record (B) Signup and view all the answers

In a relational database, how are tables connected?

By having common data points (B) Signup and view all the answers

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

To ensure each record has a unique identifier (A) Signup and view all the answers

What does a flat database consist of?

A single table (D) Signup and view all the answers

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