IS 385 Ch 7

A data flow can go directly back to the same process it leaves.

False

Assume Process 7.4 produces a data flow and that Process 7.2 must be ready to accept it; we would say that these processes are physically linked to each other.

False

DFD cohesion means your DFDs include all of the necessary components for the system you are modeling.

False

On a data flow diagram, a check and payment coupon are represented as a data store.

False

On a data flow diagram, a diamond represents a process.

False

On a data flow diagram, an arrow represents an action, such as calculating an employee's pay.

False

Process modeling for Internet applications is not as important as it is for more traditional systems.

False

Structured analysis is the process of discovering discrepancies between two or more sets of data flow diagrams or discrepancies within a single DFD.

False

The calculation of a student's grade is represented on a data flow diagram as a data flow.

False

The decomposition of Process 1.1 is shown on a level-1 diagram.

False

To keep a data flow diagram uncluttered, you may repeat data stores, sinks/sources, and processes.

False

_____________ is a repetitive process of breaking the description or perspective of a system down into finer and finer detail.

Functional decomposition

___________ graphically represents the processes that capture, manipulate, store, and distribute data between a system and its environment and among components within a system.

Process modeling

__________ are the works or actions performed on data so that they are transformed, stored, or distributed.

Processes

___________ is the origin and/or destination of data.

Source/sink

A composite data flow on one level can be split into component data flows at the next level, but no new data can be added and all data in the composite must be accounted for in one or more subflows.

True

A context diagram shows the scope of the organizational system, system boundaries, external entities that interact with the system, and major information flows between entities and the system

True

A context diagram shows the scope of the organizational system, system boundaries, external entities that interact with the system, and major information flows between entities and the system.

True

A course schedule request is represented on a data flow diagram as a data flow.

True

A data flow diagram is a graphical tool that allows analysts to illustrate the flow of data in an information system.

True

A data flow repository entry would include the composition or list of data elements contained in the data flow.

True

A data flow represents data in motion, moving from one place in the system to another.

True

A data flow to a data store means update.

True

A fork in a data flow means that exactly the same data go from a common location to two or more different processes, data stores, or sources/sinks.

True

A functional hierarchy diagram is a picture of the various tasks performed in a business and how they are related to each other.

True

A gross violation of DFD consistency would be a level-1 diagram with no level-0 diagram.

True

A level-0 diagram is a data flow diagram that represents a system's major processes, data flows, and data stores at a high level of detail.

True

A process has a verb phrase label.

True

As a rule of thumb, no data flow diagram should have more than about seven processes on it, because the diagram would be too crowded and difficult to understand.

True

Assume we have placed a data store between Process 5.1 and Process 5.5; we would say that these processes are decoupled.

True

Because the system's data stores are conceptually inside one process, no data stores appear on a context diagram.

True

Data cannot move directly from a source to a sink.

True

Data flow diagramming is one of several structured analysis techniques used to increase software development productivity.

True

Data flow diagrams evolve from the more general to the more detailed as current and replacement systems are better understood.

True

Functional decomposition is a repetitive process of breaking the description or perspective of a system down into finer and finer detail.

True

The data a sink receives and often what data a source provides are fixed.

True

The decomposition of Process 2.4.3.4 is shown on a level-4 diagram.

True

The determination of which items are low in stock is represented on a data flow diagram as a process

True

The extent to which information contained on one level of a set of nested data flow diagrams is also included on other levels refers to: a. DFD consistency b. DFD completeness c. DFD gap proofing d. DFD flexibility

a. DFD consistency

If an input from a source appears at level-0, it must: a. appear on the context diagram b. be connected to a data flow c. be connected to a sink d. be connect to a data store

a. appear on the context diagram

The diagram that shows the scope of the system, indicating what elements are inside and which are outside the system, is called a: a. context diagram b. level-2 diagram c. referencing diagram d. representative diagram

a. context diagram

By placing a data store between two processes, this: a. decouples the processes b. enables store and forward capabilities c. enhances the flow of data between the processes d. structures the processes

a. decouples the processes

A black hole is one that: a. has only inputs b. has only outputs c. has not been exploded to show enough detail d. has insufficient inputs to produce the associated processes

a. has only inputs

A DFD that is a result of three nested decompositions of a series of sub-processes from a process on a level-0 diagram defines a: a. level-3 diagram b. level-1 diagram c. level-2 diagram d. primitive diagram

a. level-3 diagram

Recording a customer's payment is represented on a data flow diagram as a: a. process b. source c. data flow d. data store

a. process

Data flow diagrams that concentrate on the movement of data between processes are referred to as: a. process models b. data models c. flow models d. flow charts

a. process models

The origin and/or destination of data, sometimes referred to as external entities defines: a. source/sink b. data store c. data flow d. process

a. source/sink

An ________ represents a data flow.

arrow

Which of the following is not a true statement regarding data flows? a. A fork in a data flow means that exactly the same data goes from a common location to two or more different processes, data stores, or sources/sinks. b. A data flow can go directly back to the same process it leaves. c. A data flow has a noun phrase label. d. A data flow has only one direction of flow between symbols.

b. A data flow can go directly back to the same process it leaves.

The extent to which all necessary components of a data flow diagram have been included and fully described refers to: a. DFD consistency b. DFD completeness c. DFD gap proofing d. DFD flexibility

b. DFD completeness

The conservation of inputs and outputs to a data flow diagram process when that process is decomposed to a lower level defines: a. decomposition b. balancing c. conservation d. data flow structuring

b. balancing

An arrow on a data flow diagram represents a: a. data store b. data flow c. process d. source/sink

b. data flow

Student data contained on an enrollment form is represented on a data flow diagram as a: a. process b. data flow c. source d. data store

b. data flow

Data at rest, which may take the form of many different physical representations, defines: a. source b. data store c. data flow d. process

b. data store

A modeling technique that allows you to represent a set of conditions and the actions that follow from them in a tabular format best describes: a. data flow diagram b. decision table c. decision tree d. Structured English

b. decision table

A miracle process is one that: a. has only inputs b. has only outputs c. cannot be exploded further d. has insufficient inputs to produce the associated processes

b. has only outputs

The new logical model will differ from the current logical model by: a. identifying which system functions will be automated and which will be manual b. having additional functions, removing obsolete functions, and reorganizing inefficient flows c. including an identification of the "technology" used to process the data d. representing the physical implementation of the new system

b. having additional functions, removing obsolete functions, and reorganizing inefficient flows

A supplier of auto parts to our company is represented on a data flow diagram as a: a. process b. source c. data flow d. data store

b. source

Having a level-1 diagram with no level-0 diagram is an example of a: a. violation of completeness b. violation of consistency c. gap d. structuring violation

b. violation of consistency

The deliverables of process modeling state: a. how you should develop the system during physical design b. what you learned during requirements determination c. how you should implement the new system during implementation d. what you learned during project planning

b. what you learned during requirements determination

Which of the following is a true statement regarding a data store? a. Data can move directly from one data store to another data store. b. Data can move directly from a sink to a data store. c. A data store has a noun phrase label. d. Data can move from an outside source to a data store.

c. A data store has a noun phrase label.

Which of the following is not an advanced rule governing data flow diagramming? a. To avoid having data flow lines cross each other, data stores may be repeated on a DFD. b. At the lowest level of DFDs, new data flows may be added to represent data that are transmitted under exceptional conditions. c. Composite data flows on one level cannot be split into component data flows at the next level. d. The inputs to a process must be sufficient to produce the outputs from the process.

c. Composite data flows on one level cannot be split into component data flows at the next level.

Referencing functional hierarchy diagrams, which of the following indicates that a display can be expanded? a. a red pound sign in a orange diamond b. a black plus sign in a blue diamond c. a black plus sign in a red circle d. a minus sign in a red circle

c. a black plus sign in a red circle

If a data flow appears on the context diagram and is also represented at level-0, this would be referred to as: a. leveling b. flow conservation c. balancing d. matching

c. balancing

If two processes are connected by a data flow, they are said to: a. share the same timing effects b. share the same data c. be coupled to each other d. be strapped to each other

c. be coupled to each other

If your DFD contains data flows that do not lead anywhere, it is not: a. gap proof b. a primitive diagram c. complete d. consistent

c. complete

Data flow diagrams that specify what people and technologies are used in which processes to move and transform data, accepting inputs and producing outputs are referred to as: a. logical data flow diagrams b. reference data flow diagrams c. current physical data flow diagrams d. logistic data flow diagrams

c. current physical data flow diagrams

A computer-based file containing employee information is represented on a data flow diagram as a: a. data flow b. source c. data store d. process

c. data store

The act of going from a single system to several component processes refers to: a. structuring b. balancing c. functional decomposition d. formatting

c. functional decomposition

A data flow diagram that represents a system's major processes, data flows, and data stores at a high level of detail refers to: a. context diagram b. level-1 diagram c. level-0 diagram d. level-00 diagram

c. level-0 diagram

When you believe that you have shown each business form or transaction, computer screen, and report as a single data flow, you have probably reached the: a. level-0 diagrams b. level-1 diagrams c. primitive data flow diagrams d. level-3 diagrams

c. primitive data flow diagrams

Graphically representing the functions, or processes, which capture, manipulate, store, and distribute data between a system and its environment and between components within a system refers to: a. data modeling b. flow charting c. process modeling d. transition modeling

c. process modeling

Which of the following is not one of the four types of data flow diagrams? a. current physical b. current logical c. updated physical d. new physical

c. updated physical

A _________ is a data flow diagram of the scope of an organizational system that shows the system boundaries, external entities that interact with a system, and the major information flows between entities and the system.

context diagram

Which of the following is a true statement regarding data flows? a. A data flow may have multiple directions between symbols. b. A data flow to a data store means retrieve or use. c. A data flow from a data store means update. d. A join in a data flow means that exactly the same data comes from any of two or more different processes, data stores, or sources/sinks to a common location.

d. A join in a data flow means that exactly the same data comes from any of two or more different processes, data stores, or sources/sinks to a common location.

Which of the following is a true statement regarding sources/sinks? a. Sources/sinks are always outside the information system and define the boundaries of the system. b. Data must originate outside a system from one or more sources. c. The system must produce information to one or more sinks. d. All of the above are true statements.

d. All of the above are true statements.

When comparing Oracle's process models with data flow diagrams, which of the following is a true statement? a. Oracle's process models contain detailed information about data in flow or in store. b. Data flow diagrams do not have a numerical process hierarchy. c. Data flow diagrams include animation, time and external calls. d. Oracle's process models can be animated with time parameters.

d. Oracle's process models can be animated with time parameters.

On a data flow diagram, you may: a. repeat data stores b. repeat sources/sinks c. repeat processes d. both a and b

d. both a and b

Data in motion, moving from one place in a system to another, defines: a. data store b. process c. source d. data flow

d. data flow

A file folder containing orders is represented on a data flow diagram as a: a. process b. source c. data flow d. data store

d. data store

Which of the following is best described as a picture of the various tasks performed in a business and how there are related to each other, breaking the tasks into their various parts, and all the parts are shown in the same representation? a. structure chart b. decision table c. data flow diagram d. functional hierarchy diagram

d. functional hierarchy diagram

The process in analysis in which the analyst tries to discover discrepancies between two or more sets of data flow diagrams, representing two or more states of an information system, or discrepancies within a single DFD, is referred to as: a. double checking b. sequencing c. referencing d. gap analysis

d. gap analysis

Which of the following is considered when diagramming? a. the interactions occurring between sources and sinks b. how to provide sources and sinks direct access to stored data c. how to control or redesign a source or sink d. none of the above

d. none of the above

The lowest level of DFDs is called: a. level-0 diagrams b. context diagrams c. level-1 diagrams d. primitive data flow diagrams

d. primitive data flow diagrams

The lowest level of decomposition for a data flow diagram is called the: a. context diagram b. level-0 diagram c. level-1 diagram d. primitive diagram

d. primitive diagram

Calculating an employee's salary is represented on a data flow diagram as a: a. data flow b. source c. data store d. process

d. process

The work or actions performed on data so that they are transformed, stored, or distributed defines: a. source/sink b. data store c. data flow d. process

d. process

A square on a data flow diagram represents a: a. data store b. data flow c. process d. source/sink

d. source/sink

Which of the following is not one of the primary deliverables resulting from studying and documenting a system's processes? a. context data flow diagram b. thorough descriptions of each DFD component c. DFDs of the current logical system d. state-transition diagram

d. state-transition diagram

A __________ is a graphic that illustrates the movement of data between external entities and the processes and data stores within a system.

data flow diagram

A ________ represents data at rest, which may take the form of many different physical representations.

data store

On a data flow diagram, supplier information kept in a notebook is represented as a _______

data store

A ________ is a data flow diagram that represents a system's major processes, data flows, and data stores at a high level of detail.

level-0 diagram

Determining an employee's schedule is an example of a _________.

process

The symbol for sources/sinks is a _________.

square