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Data Modeling: Introduction and Principles

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Data Modeling: Introduction and Principles

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Questions and Answers

What are the basic building blocks of all data models?

Tables, records, fields, and keys

Entities, attributes, relationships, and constraints (correct)

Variables, arrays, loops, and functions

Classes, methods, properties, and inheritance

Which type of relationship does a data model use to describe an association among entities?

Parent-Child

Primary-Foreign

Main-Subordinate

One-to-Many (correct)

What is a business rule used to define within a specific organization?

Entities, attributes, relationships, and constraints (correct)

Company policies and procedures

Database schema and structure

Software development processes

Who are the main sources of business rules in the context of database design?

Company managers, policy makers, and department managers Signup and view all the answers

Why is the process of identifying and documenting business rules essential to database design?

It helps to standardize the company’s view of data. Signup and view all the answers

What is the main function of a data model?

To represent complex real-world data structures in a graphical form Signup and view all the answers

Which process does data modeling serve as a bridge between?

Real-world objects and the computer database Signup and view all the answers

What does a well-developed data model facilitate?

Interaction among the designer, applications programmer, and end user Signup and view all the answers

In the context of databases, what does a data model represent?

Data structures and their characteristics, relations, constraints, transformations, and other constructs Signup and view all the answers

What is the first step in designing a database?

Data modeling Signup and view all the answers