IST 352 Chapter 7

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.

True

Assume condition one has two values, condition two has five values, condition three has three values, and condition four has two values; the number of rules required for the decision table is sixty

12

Assume the first condition has two values; the second condition has two values; the third condition has three values. How many rules will there be? A) 7 B) 12 C) 6 D) 11

True

Assume your local veterinarian records information about each of his patients on patient medical history forms; the collection of medical history forms is represented on a data flow diagram as a data store.

True

Because data flow names represent a specific set of data, another data flow that has even one more or one less piece of data must be given a different unique name.

True

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

Process

Calculating an employee's salary is represented on a data flow diagram as a: A) data flow B) source C) data store D) process

Process models

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

Data Flow

Data in motion, moving from one place in a system to another, defines: A) data store B) process C) source D) data flow

True

Decision tables allow you to represent a set of conditions and the actions that follow from them in a tabular format.

Condition Stubs

The part of a decision table that lists the conditions relevant to the decision is called: A) action stubs B) condition stubs C) condition list D) condition execution

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

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 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.

All of the above

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.

Level-3 Diagram

A DFD that is a result of three nested decompositions of a series of subprocesses 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

True

A Web site's customer is represented as a source on a data flow diagram.

Has only inputs

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

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 customer order is represented on a data flow diagram as a data flow.

False

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

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

Statements

A decision table does not include: A) statements B) condition stubs C) action stubs D) rules

True

A decision table is a matrix representation of the logic of a decision, which specifies the possible conditions for the decision and the resulting actions.

Removing any rules with impossible actions

A decision table is simplified by: A) removing extended entries B) removing any rules with impossible actions C) removing simple entries D) removing any rules with static actions

Data Store

A file folder containing orders is represented on a data flow diagram as a: A) process B) source C) data flow D) data store

Decision Table

A matrix representation of the logic of a decision, which specifies the possible conditions for the decision and the resulting actions, defines a: A) structure chart B) state transition diagram C) decision table D) sequence diagram

Decision Table

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) flowchart D) Structured English

False

A primitive level data flow diagram is the first deliverable produced during requirements structuring.

Verb Phrase label

A process has a: A) pronoun label B) adjective label C) verb phrase label D) noun phrase label

Source

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

False

Action stubs are that part of a decision table that lists the conditions relevant to the decision.

Data Flow

An arrow on a data flow diagram represents a: A) data store B) data flow C) process D) source/sink

Dash

An indifferent condition is represented by a(n): A) dash (-) B) asterisk (*) C) exclamation point (!) D) pound sign (#)

True

Completeness, consistency, timing, iterative development, and primitive DFDs are guidelines for drawing DFDs.

False

Double-ended arrows are used to represent data flowing in both directions.

Numbering Considerations

Guidelines for drawing DFDs include the following except for: A) completeness B) consistency C) numbering considerations D) timing considerations

Balancing

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

False

If an inventory item is either perishable or nonperishable, its condition is classified as an extended entry.

Be coupled to each other

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

Indifferent condition

In a decision table, a condition whose value does not affect which actions are taken for two or more rules is referred to as a(n): A) indifferent condition B) static condition C) fixed condition D) flexible condition

False

In a decision table, an indifferent condition is represented by an asterisk.

Process

In the Gane and Sarson model, a rectangle with rounded corners on a data flow diagram represents a: A) data store B) data flow C) process D) source/sink

False

Inefficiencies cannot be identified by studying DFDs.

True

Make the decision table as simple as possible by removing any rules with impossible actions.

True

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.

False

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

Both A and B

On a data flow diagram, you may: A) repeat data stores B) repeat sources/sinks C) repeat processes D) both A and B

False

One of the primary purposes of a DFD is to represent time, giving a good indication of whether data flows occur constantly in real time, once a day, or once a year.

True

Referencing a decision table, a limited entry occurs when a condition has only two possible values.

True

Referencing a decision table, an action is provided for each rule

True

Rules are that part of the decision table that specify which actions are to be followed for a given set of conditions

Functional Decomposition

The act of going from a single system to several component processes refers to: A) structuring B) balancing C) functional decomposition D) formatting

False

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

True

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

What you learned during requirements determination

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

True

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

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

DFD Completeness

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

DFD Consistency

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

Primitive Diagram

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

False

To date, data flow diagrams have not been useful tools for modeling processes in business process reengineering.

multiply the number of values for each condition by the number of values for every other condition

To determine the number of rules required for the decision table, you would: A) add the number of values for each condition to the number of values for every other condition B) multiply the number of conditions by two C) add the number of values for each condition to the number of values for every other condition, then subtract 1 D) multiply the number of values for each condition by the number of values for every other condition

False

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

Limited Entry

When condition values are either "yes" or "no", these values are called a(n): A) extended entry B) simple entry C) complex entry D) limited entry

False

When constructing data flow diagrams, you should show the interactions that occur between sources and sinks.

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

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.