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(SLU) GIT > Unit 7 (1) > Flashcards

Unit 7 (1) Flashcards

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Git Commands flashcards
1
Q
  • uses various symbols to show how the system transforms input data into useful information
  • shows how data moves through an information system but does not show program logic or processing steps
  • provides a logical model that shows what the system does, not how it does it
  • subdivided into successively lower levels in order to
    provide increasing amounts of detail.
A

Data Flow Diagram

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2
Q

CONTEXT DIAGRAM

A

Highest level (most general)

Purpose: shows inputs and outputs of the system

Only one process symbol

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3
Q

LOWER-LEVEL DIAGRAMS (Level – 0, …)

A

Purpose: show all major activity steps of a system

Processes are labeled 1.0, 2.0 and so on

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4
Q

Data Flow Diagram Symbols

A

Gane and Sarson Symbols

Yourdon-Coad Symbols

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5
Q
  • source or destination of a data flow which is outside the area of study. (Terminators, Source, Sink)
  • Only those entities which originate or receive data are
    represented on a business process diagram.
  • symbol used is an oval containing a meaningful and unique identifier.
A

Data Flow Diagram Symbols –External Entity

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6
Q
  • process shows a transformation or manipulation of data flows
    within the system. Receives input data and produces output that
    has a different content, form, or both
  • Contain the business logic, also called business rules. Referred to as a black box
  • The symbol contains two descriptive elements:

An identification number appears in the top part to show the process number

A descriptive title is placed in the center of the box. This should be a
simple imperative sentence with a specific verb, for example ‘maintain customer records’ or ‘find driver’.

A

Data Flow Diagram Symbols –
Process

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7
Q

Common DFD Mistakes

A

Illegal data flows
Black Hole
Miracle / Spontaneous Generation
Grey Hole
Same names for the data flows, data stores, processes, and
entities

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8
Q

shows the flow of information from its source to its
destination.

  • represented by a line, with arrowheads showing the
    direction of flow. Information always flows to or from a process
    and may be written or electronic.
A

data Flow Diagram – Data Flow

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9
Q

Documents the details of a functional primitive, and represents

a specific set of processing steps and business logic

A

Process Description

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10
Q

Process Description Tools

A

Modular Design
Structured English
Decision Tables
Decision Trees

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11
Q

based on combinations of three logical structures, sometimes called __________, which serve as building blocks for the process

A

control structures

Modular Design

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12
Q

a subset of standard English that shows the iteration structure and describes logical processes clearly and accurately

A

Structured English

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13
Q

logical structure that shows every combination of conditions and outcomes

A

Decision Tables

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14
Q

graphical representation of the conditions, actions, and rules found in a decision table

A

Decision Trees

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15
Q

model shows how the system’s requirements are
implemented

A

physical model

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16
Q

central documentation tool for structured analysis

A

data dictionary

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17
Q

can be used to develop a logical model during one systems analysis phase, and a physical model during the systems design phase

A

Structured analysis tools

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18
Q

A model of software deployment where an application is hosted as a service provided to customers over the Internet.

  • reduces the customer’s need for software maintenance, operation, and support

___________ believes that the concept of software as a service is redefining the way that
companies develop and deploy their information systems

A

Software as a Service

The Software and Information Industry Association (SIIA)

19
Q
  • System design is influenced by compatibility issues

Systems are designed to run on local and wide-area company networks

Web-based features are treated as enhancements rather than core elements of the
design

A

Traditional development

20
Q

Systems are developed and delivered in an Internet-based framework such as .NET or
WebSphere

Internet-based development treats the Web as the platform, rather than just a
communication channel

Web-based software usually requires additional layers, called middleware

A

Web-based development

21
Q

The transfer of information systems development, operation, or maintenance to an outside firm that provides these services, for a
fee, on a temporary or long-term basis

can refer to relatively minor programming tasks,
renting software from a service provider, outsourcing a basic
business process (often called business process outsourcing, or
BPO), or handling a company’s entire IT function

A

outsourcing

22
Q

A firm that offers outsourcing solutions is called a ______________

A

service provider

23
Q

Also called managed hosting

A

Internet business services (IBS)

24
Q

also known as global outsourcing

Practice of shifting IT development, support, and operations to other countries

A

Offshore Outsourcing

25
Q

The choice between developing versus purchasing software often is called a

A

make or buy, or build or buy decision

26
Q

companies that develop software for sale

___________: a firm that enhances a commercial package by adding custom features and configuring it for a particular industry

___________: available for every type of activity, separate divisions

___________: for a specific type of business

A

Software vendors

value added reserver (VAR)

horizontal applications

vertical applications

27
Q

Satisfy unique business requirements

Minimize changes in business
procedures and policies

Meet constraints of existing systems

Meet constraints of existing
technology

Develop internal resources and
capabilities

A

IN-HOUSE DEVELOPMENT

28
Q

Lower costs

Requires less time to implement

Proven reliability and performance
benchmarks

Requires less technical development
staff

Future upgrades provided by the
vendor

Obtain input from other companies

A

PURCHASING A SOFTWARE
PACKAGE

29
Q

Source from the Internet bulletin board systems that contain
thousands of forums, called _____________

A

newsgroup

30
Q

Future Trends in Software
Development

A

Web services

Open source software

Service-oriented architecture (SOA)

Loose coupling

Software quality is more important than ever

31
Q

collects input data, triggers or authorizes an input action, and provides a record of the original transaction

A

source document

32
Q

how the form will appear and how easy it will be to complete

A

form layout

33
Q

Form Design

A

heading zone
control zone
instruction zone
body zone
totals zone
authorization zone

34
Q

contains the company
name/logo and the details of the form

A

heading zone

35
Q

contains codes,
identification information, numbers, and
dates that are used for storing
completed forms

A

control zone

36
Q

contains instructions for completing the form

A

instruction zone

37
Q

main part of the form

A

body zone

38
Q

contains required signatures

A

authorization zone

39
Q

Most effective method of online data entry is ____________

A

form filling

40
Q

believes that users scan a page, picking out individual words and sentences

A

Dr. Jakob Nielson

41
Q

Every piece of information should be traceable back to the input
data

Audit trail

Data security

Records retention policy

Encrypted – encryption

A

Input Control

42
Q

Output Design (Types of Output)

A

Internet-based information
delivery

E-mail
Blogs
Instant messaging
Wireless devices

Digital audio, images, and
video

Podcasts
Automated facsimile systems
Computer Output to Microfilm

Computer Output to Digital
Media

43
Q

Line printers often use ____________

A

greenbar paper

(SLU) GIT (8 decks)

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