Exam 7: Structuring System Process Requirements

List the advanced rules governing DFDs.

A data flow cannot go directly back to the same process it leaves.There must be at least ________ other process(es)that handle(s)the data flow,produce(s)some other data flow,and return(s)the original data flow to the beginning process.

Which characteristics of sources and sinks are of no importance?

The information system is depicted as a DFD and the highest-level view of this system is called a context diagram.

A ________ is a picture of the movement of data between external entities and the processes and data stores within a system.

Data cannot move directly from a source to a sink.It must be moved by a process if the data are of any concern to our system.Otherwise,the data flow is not shown on the ________.

Provide an example of DFDs being used in BPR.

A(n)________ is an external entity that interacts with a system and is someone or something that exchanges information with the systems.

What is process modeling? What are the deliverables for process modeling?

How can you use DFDs as an analysis tool?

Flowcharting has been criticized by proponents of structured analysis and design because it is too ________.

A(n)________ in a data flow means that exactly the same data come from any of two or more different processes,data stores,or sources/sinks to a common location.

DFDs are not as good as flowcharts for depicting the details of physical systems; on the other hand,flowcharts are not very useful for depicting purely logical information flows.

According to the DFD guidelines,the inputs to a process are different from the outputs of that process.

Explain the process of functional decomposition.

Data flow repository entries typically will NOT include ________.

When two ________ have the same data flow name,you must be careful that these flows are exactly the same.

________,shown as a half arrowhead in a sequence diagram,is one where the sender does not have to wait for the recipient to handle the message.

Compare and contrast DFDs and flowcharts.

________ is the time period during which an object performs an operation.