SPRING 2016 CIS 406-02: CH5 – Flashcards

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

True or False: Systems analysts call an entity that receives data from the system a source.

True or False: A disadvantage of the four-model approach is that the requirements of a new information system always are quite different from the current information system, especially when the proposal is based on new computer technology rather than a large number of new requirements.

In a data dictionary, BLANK is the maximum number of characters for an alphabetic or character data element or the maximum number of digits and number of decimal positions for a numeric data element.

In a DFD, the Gane and Sarson symbol for a process is a

In most data dictionaries, records are defined together with the data flows and data stores.

In a DFD, the Gane and Sarson symbol for a data store is

What also is called looping?

Decision trees show the logic structure in a

In the accompanying figure, the sequence structure is the completion of

In a data dictionary, any name other than the standard data element name is called a(n)

In a DFD, the Gane and Sarson symbol for a data flow is a

True or False: In addition to describing each data element, data flow, data store, record, entity, and process, the data dictionary documents the relationships among these components.

DFD symbols are referenced by using all BLANK letters for the symbol name.

True or False: Systems analysts call an entity that supplies data to the system a sink.

BLANK is/are logically impossible in a DFD because a process must act on input, shown by an incoming data flow, and produce output, represented by an outgoing data flow.

In a data dictionary, some data elements have BLANK rules, such as an employee's salary must be within the range defined for the employee's job classification.

In a DFD, the Gane and Sarson symbol for an entity is a

True or False: More complex systems have fewer processes, and analysts need only work through very few levels to identify the functional primitives

True or False: Using Gane and Sarson symbols, a DFD represents processes as rectangles with rounded corners.

A spontaneous generation process is a process that has

True or False: 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.

The iteration structure is the completion of

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

True or False: Two DFDs are leveled, for example, if the child diagram at the bottom has the same input and output flows as the parent process at the top of the diagram.

True or False: During the systems design phase, a physical model of the new information system is created that follows from the logical model and involves operational tasks and techniques.

A DFD shows

BLANK is the process of drawing a series of increasingly detailed DFDs, until all functional primitives are identified.

Typical process description tools include

In a data dictionary, data elements are combined into BLANK, which are meaningful combinations of data elements that are included in data flows or retained in data stores.

A data BLANK is a central storehouse of information about a system's data.

True or False: In a DFD, processes contain the business logic, also called business rules, that transform the data and produce the required results.

A gray hole is a process that has

The major benefit of BLANK is that it gives a clear picture of current system functions before any modifications or improvements are made.

True or False: In modular design, a rectangle represents a condition or decision, a diamond shape represents a step or a process, and the logic follows the lines in the direction indicated by the arrows.

True or False: In a DFD, a process symbol can have only one outgoing data flow.

True or False: Two data stores can be connected by a data flow without an intervening process.

A black hole is a process that has

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

True or False: 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 data element is

A case repository

Modular Design is based on

Structured English uses

In decision tables the number of rules

In decision tables dashes represent

Sequencing of models helps

Four-Model Approach: Develop

Each functional primitive process is documented using