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Exam 9: Process Modeling

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Question 101

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In data flow diagrams, arrows represent___________________________ .

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Question 102

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Physical models show not only what a system is or does, but also how the system is physically and technically implemented. They are implementation independent because they specify the technology.

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Question 103

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Another name for a data flow diagram is:

For each use case we need to list: (1) _________________________________ (2) _____________________ (3) ______ and (4) ___________.

Events are sometimes called transactions.

_________________________ models show not only what a system is or does, but also how the system is technically implemented. They are implementation dependent because they reflect technology choices and limitations of those technology choices.

Structured English is built using the following three fundamental constructs that have governed structured programming: (1) ____________________________________________________ (2) ______________________________________________________ and (3) ________________.

A composite data flow is a data flow that consists of other data flows.

In data flow diagrams, open-ended boxes represent external agents.

A system is a process.

Structured English should be precise enough to clearly specify the required business procedure to a programmer or user. But it should not be so inflexible that you spend hours arguing over syntax.

Data stores are data in motion, and data flows are data at rest.

Logical models:

The context diagram is constructed for event processes that require additional processing details. These data flow diagrams include all the elementary processes, data stores and data flows for single events.

Each logical process must be implemented in software.

A system context diagram is constructed to establish initial project scope.

A logical process can use stored data to create, read, update or delete a record.

A control flow represents a condition or non-data event that triggers a process.

A black hole is an acceptable elementary process.

Elementary processes are at the highest level of detail when depicted in a process model.