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UNIT 2 Global Information > LO5 Flow of Information > Flashcards

Flashcards in LO5 Flow of Information Deck (9)
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1

What is Qualitative Data?

Descriptive data, often composed of text.

2

What is Quantitative Data?

Measured data, often in the form of numbers, percentages or statistics

3

What is a level 0 Data Flow Diagram

Level 0 data flow diagrams show the transfer of data in a simple manner.
Commonly Generalised and not shown separately for a more basic overview.

4

What is a Level 1 Data Flow Diagram?

Level 1 data flow diagrams show the transfer of data in a more detailed manner. Processes are shown separately, for a more complex and realistic overview.

5

Impacts that Affect the Flow of Information?

Reasons include:
Information not being filled incorrectly.
Computer system failure.
Human Error.
Breakdowns in human communication.

6

What does the arrow represent in a DFD?

Data Flow

7

What does the rectangle with soft edges represent in a DFD?

Process

8

What does the rectangle with sharp edges represent in a DFD?

External Entity.

9

What does the Rectangle with sharps edges and a small box cut into the shape represent in a DFD?

Data store