CIS1140 Chapter 5 Test

In data flow diagrams (DFDs), a process resembles a _____, where the inputs, outputs, and general functions of the process are known, but the underlying details are not shown.

A) decision table

B) terminator

C) black box

D) business rule

C) black box

The symbol for a data flow is a triangle.

A) True

B) False

B) False

In a data flow diagram (DFD), the Gane and Sarson symbol for a process is a _____.

A) rectangle, which may be shaded to make it look three-dimensional

B) flat rectangle that is open on the right side and closed on the left side

C) rectangle with rounded corners

D) line with a single or double arrowhead

C) rectangle with rounded corners

In a data flow diagram (DFD), the Gane and Sarson symbol for a data flow is a _____.

A) line with a single or double arrowhead

B) flat rectangle that is open on the right side and closed on the left side

C) triangle, which may be shaded to make it look three-dimensional

D) segment of a differentiable curve

A) line with a single or double arrowhead

_____ maintains consistency among data flow diagrams (DFDs) by ensuring that input and output data flows align properly.

A) Indexing

B) Balancing

C) Adapting

D) Shipping

B) Balancing

The end product of data and process modeling is a logical model that will support business operations and meet user needs.

A) True

B) False

A) True

A data flow diagram shows the detailed contents of a data store.

A) True

B) False

B) False

When drawing a context diagram, standardized names should be used within each set of symbols.

A) True

B) False

B) False

When a data flow diagram (DFD) is exploded, the lower-level diagram is referred to as the parent diagram.

A) True

B) False

B) False

Among the symbols in the accompanying figure, a _____ receives input data and produces output that has a different content, form, or both.

A) gray hole

B) process

C) data store

D) data flow

B) process

Among the symbols in the accompanying figure, a _____ is used to represent data that a system stores because one or more processes need to use the data at a later time.

A) data flow

B) gray hole

C) data store

D) process

C) data store

In a data flow diagram (DFD), systems analysts call an entity that receives data from the system a source.

A) True

B) False

B) False

Balancing _____.

A) uses a series of increasingly detailed data flow diagrams (DFDs) to describe an information system

B) uses a series of increasingly sketchy data flow diagrams (DFDs) to describe an information system

C) ensures that the input and output data flows of the parent data flow diagram (DFD) are maintained on the child data flow diagram (DFD)

D) ensures that the input and output data flows of the child data flow diagram (DFD) are maintained on the parent data flow diagram (DFD)

C) ensures that the input and output data flows of the parent data flow diagram (DFD) are maintained on the child data flow diagram (DFD)

On lower-level diagrams with multiple processes, there should not be more than nine process symbols.

A) True

B) False

A) True

A diverging data flow is a data flow in which the same data travels to two or more different locations.

A) True

B) False

A) True

Deciding whether to explode a process further or determine that it is a functional primitive is a matter of experience, judgment, and interaction with programmers who must translate the logical design into code.

A) True

B) False

A) True

In data and process modeling, a(n) _____ shows what the system must do, regardless of how it will be implemented physically.

A) logical model

B) relational model

C) organizational model

D) physical model

A) logical model

Processes are generally very simple.

A) True

B) False

B) False

A _____ documents the details of a functional primitive and represents a specific set of processing steps and business logic.

A) logical description

B) process description

C) primitive description

D) function-based description

B) process description

In a data flow diagram (DFD), a spontaneous generation process is a process that has _____.

A) at least one output and one input, but the output obviously is insufficient to generate the input shown

B) at least one input and one output, but the input obviously is insufficient to generate the output shown

C) no input

D) no output

C) no input

The symbol for an entity is a circle.

A) True

B) False

B) False

Data flow diagram entities also are called terminators because they are data origins or final destinations.

A) True

B) False

A) True

Using _____, an analyst starts with an overall view, which is a context diagram with a single process symbol, and then creates diagram 0, which shows more detail.

A) balancing

B) exploding

C) leveling

D) indexing

C) leveling

By showing processes as _____, an analyst can create data flow diagrams (DFDs) that show how the system functions but avoid unnecessary detail and clutter.

A) decision tables

B) business rules

C) process descriptions

D) black boxes

D) black boxes

In a data flow diagram (DFD), a black hole is a process that has _____.

A) at least one output and one input, but the output obviously is insufficient to generate the input shown

B) at least one input and one output, but the input obviously is insufficient to generate the output shown

C) no input

D) no output

D) no output

A _____ is logically impossible in a data flow diagram (DFD) because a process must act on input, shown by an incoming data flow, and produce output, represented by an outgoing data flow.

A) server farm

B) black hole

C) gray matter

D) spontaneous combustion

B) black hole

What makes one system more complex than another is the number of components, the number of levels, and the degree of interaction among its processes, entities, data stores, and data flows.

A) True

B) False

A) True

_____ is based on combinations of the three logical structures, or control structures, which serve as building blocks for the process.

A) Visual design

B) Interface design

C) Modular design

D) Product design

C) Modular design

In DFDs, a process symbol can be referred to as a white hole, because the inputs, outputs, and general functions of the process are hidden, but the underlying details and logic are known.

A) True

B) False

B) False

Among the symbols in the accompanying figure, a _____ is a path for data to move from one part of the information system to another.

A) data flow

B) data store

C) process

D) gray hole

A) data flow

In the systems design phase, a logical model is built that describes how the system will be constructed.

A) True

B) False

B) False

A data flow diagram (DFD) does not show the external entities that provide data to the system or receive output from the system.

A) True

B) False

B) False

When a data flow diagram (DFD) is exploded, the higher-level diagram is called the child diagram.

A) True

B) False

B) False

In a data flow diagram (DFD), the name of the process appears inside a rectangle.

A) True

B) False

A) True

In data flow diagrams (DFD), systems analysts call an entity that supplies data to the system a sink.

A) True

B) False

B) False

Data stores are shown in a context diagram because data stores are external to the system.

A) True

B) False

B) False

In a data flow diagram (DFD), a data flow must have a process symbol on at least one end.

A) True

B) False

A) True

In a data flow diagram (DFD), the Gane and Sarson symbol for an entity is a ____.

A) line with a single or double arrowhead

B) flat rectangle that is open on the right side and closed on the left side

C) rectangle, which may be shaded to make it look three-dimensional

D) rectangle with rounded corners

C) rectangle, which may be shaded to make it look three-dimensional

In a data flow diagram (DFD), a process symbol can have only one outgoing data flow.

A) True

B) False

B) False

A data flow diagram (DFD) shows _____.

A) how a system transforms input data into useful information

B) what key fields are stored in the system

C) what data is stored in the system

D) how data arerelated

A) how a system transforms input data into useful information

Since diagram 0 is a(n) _____ version of process 0, it shows considerably more detail than a context diagram.

A) contracted

B) condensed

C) exploded

D) extrapolated

C) exploded

In addition to the Gane and Sarson symbol set, another popular symbol set is the _____ symbol set.

A) Yourdon

B) Mantissa

C) Zachman

D) Jira

A) Yourdon

In a data flow diagram (DFD), a gray hole is a process that has _____

A) no output

B) at least one input and one output, but the input obviously is insufficient to generate the output shown

C) at least one output and one input, but the output obviously is insufficient to generate the input shown

D) no input

B) at least one input and one output, but the input obviously is insufficient to generate the output shown

When a context diagram is expanded into data flow diagram (DFD) diagram 0, all the connections that flow into and out of process 0 must be retained.

A) True

B) False

A) True

A _____ shows how data moves through an information system but does not show program logic or processing steps.

A) data structure diagram

B) data flow diagram

C) data tree diagram

D) data model diagram

B) data flow diagram

If processes must be performed in a specific sequence, the information should be documented in the _____.

A) data dictionary

B) leveling guide

C) process descriptions

D) data flow diagram (DFD)

C) process descriptions

Data flow diagram (DFD) entities are also called _____ because they are data origins or final data destinations.

A) terminators

B) gray holes

C) data stores

D) pseudocodes

A) terminators

_____ is the process of drawing a series of increasingly detailed data flow diagrams (DFDs), until all functional primitives are identified.

A) Looping

B) Balancing

C) Leveling

D) Indexing

C) Leveling

To draw a context diagram, you start by placing a single process symbol on the top right corner of the page.

A) True

B) False

B) False

Diagram 0 (the numeral zero, and not the letter O) provides an overview of all the components that interact to form the overall system.

A) True

B) False

A) True