2.2 Data Flow Diagrams

In data flow diagrams, circles can be used to represent processes that take data inflows and transform them to information outflows.

• True

• False

One difference between system flowcharts and data flow diagrams is that system flowcharts show conditional logic whereas DFDs don't.

• True

• False

The highest level of data flow diagrams is the Level One diagram.

• True
• False

This is the symbol for

• External entitles

• Processes

• Data stores

• Data flows

In the data flow diagram (DFD), arrows represent which way the data goes (in or out); these are called...

• External entitles

• Processes

• Data stores

• Data flows

This is the symbol for

• External entitles

• Processes

• Data stores

• Data flows

This is the symbol for

• External entitles

• Processes

• Data stores

• Data flows

This is the symbol for

• External entitles

• Processes

• Data stores

• Data flows

An upper level DFD showing external entities and one process element ... (pick 2 answers)

• is a Context Diagram

• provides a more detailed view of the Context Level Diagram

• is a basic overview of the whole system.

• shows the main functions carried out by the system are highlighted as it is broken into its sub-processes

What is a Data Flow Diagram (DFD)?

• A DFD is a graphical representation of how data flows through a business information system

• A DFD is a flow chart that represent how data flows in a system

• A DFD is is a way to structure an organization using different levels of authority and a vertical link, or chain of command, between superior and subordinate levels of the organization

• A DFD is a chart showing how data is handled