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Data Flow Diagram and Entity Relationship Diagram Quiz

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Questions and Answers

In a data flow diagram, what is the primary purpose of processes?

To depict the work performed by specific users
To change the relationships in an entity-relationship diagram
To transform incoming data into outgoing information (correct)
To represent the system's boundaries

What is another term for an 'associative entity' in data modeling?

Gerund (correct)
Attributive entity
External entity
Co-variant entity

What does a zero on a relationship line indicate in an entity-relationship diagram?

That the relationship line is undefined
That none is possible for the next relationship (correct)
The absence of well-defined entities
That an associative entity should be created

What is the significance of underlined attributes on an entity-relationship diagram?

<p>They indicate that the attributes can be searched for (A)</p> Signup and view all the answers

Which management group typically has a high need for historical data and predictive information?

<p>Strategic management (C)</p> Signup and view all the answers

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Study Notes

Data Flow Diagrams

Processes on a data flow diagram transform incoming data into outgoing information.

Entity-Relationship Diagrams

An associative entity is also referred to as a gerund.
A zero on a relationship line indicates that none is possible for the next relationship.

Entity Attributes

Attributes that are underlined on an entity-relationship diagram can be searched for.

Management Levels

Middle management has a high need for historical data along with information that allows prediction of future events.

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