Data Flow Diagrams

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

• True
• False

A data flow diagram should balance between levels.  This refers to the fact that the level one DFD should have the same system inputs and outputs as the corresponding level zero DFD.

• True
• False

A general rule in data flow diagramming is that any single data flow diagram should not have more than about eleven processes.

• True
• False

Flowcharts are biased toward representing the physical characteristics of the system, while data flow diagrams can omit the physical system attributes.

• True
• False

One difference between system flowcharts and data flow diagrams is that system flowcharts have numerous different types of symbols and data flow diagrams have just four types of symbols.

• True
• False

In the data flow diagram (DFD), there are 4 parts. The elements that input data and the system outputs to, are called...

• External entitles

• Processes

• Data stores

• Data flows

In the data flow diagram (DFD), there are 4 parts. The way the data is collated are called...

• External entitles

• Processes

• Data stores

• Data flows

In the data flow diagram (DFD). Any real world stores of data, paper or digital are called...

• External entitles

• Processes

• Data stores

• Data flows

In the data flow diagram (DFD). The 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