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Software Engineering 3 Data Flow Diagrams by Nachum Danzig

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Software Engineering 3 Data Flow Diagrams by Nachum Danzig

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Questions and Answers

What do we call a flow between two complex processes?

Complex data flow

How can we detail a flow between two complex processes in DFD-2 and DFD-3?

By using a bi-directional arrow

How do we know the sequence of activities in a DFD?

By the direction of the arrows

What logic symbols are used in DFDs?

AND and OR Signup and view all the answers

When does a process use the AND notation in DFDs?

When it only occurs when two previous processes trigger it Signup and view all the answers

When is the OR notation used in DFDs?

When either one of two previous processes can trigger the process by itself Signup and view all the answers

What is assumed if no sign is written for a process that produces multiple outputs?

AND Signup and view all the answers

What is a basic process not connected with in a DFD?

Bi-directional arrow Signup and view all the answers

What is the exception in determining the sequence of activities in a DFD?

Arrow connectors Signup and view all the answers

What do we call a flow between a complex process and another entity?

Complex data flow Signup and view all the answers