Exam 7: Structuring System Process Requirements

A data flow has a noun phrase label.More than one data flow noun phrase can appear on a single arrow as long as all of the flows on the same arrow move together as one package.

________ is NOT a phase in a systems development life cycle.

A level-0 diagram represents the primary individual processes in the system at the highest possible level.

Data cannot move directly from one data store to another data store.Data must be moved by a ________.

A data store is data at rest and may represent only one physical location for data.

If your DFD contains data flows that do not lead anywhere or data stores,processes or external entities that are not connected to anything else,your DFD is not accurate.

A(n)________ shown as a full,solid arrowhead,is one where the caller has to wait for the receiving object to complete execution of the called operation before it itself can resume execution.

At the ________ level of DFDs,new data flows may be added to represent data that are transmitted under exceptional conditions.These data flows typically represent error messages or confirmation notices.

Functional decomposition is a(n)________ process of breaking the description of a system down into finer and finer detail,which creates a set of charts in which one process on a given chart is explained in greater detail on another chart.

Sources/sinks are sometimes referred to as external entities because they are outside the system.

A(n)________ diagram depicts the interactions among objects during a certain period of time.

An example of inconsistency would be a data flow that appears on a higher-level DFD but not on lower levels (also a violation of balancing).

Because requirements determination and structuring are often parallel steps,DFDs evolve from the more general to the more detailed as current and replacement systems are better understood.

A ________ is the work or actions performed on data so that they are transformed,stored,or distributed.

A source/sink might not consist of a person inside or outside the business unit supported by the system you are analyzing who interacts with the system.

________ is the set of behaviors or functions in a use case that follow exceptions to the main success scenario.

The lowest level of a DFD is called a ________ data flow diagram.

With only ________ symbols,you can use DFDs to represent both physical and logical information systems.

List the parts of a DFD diagram and at least one rule for each one.

A data flow diagram (DFD)is a picture of the movement of data between external entities and the processes and data stores within or outside a system.