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CIS Final

Terms

undefined, object
copy deck
structured design
approach in which all program logic is constructed from a combination of three control structures
head crash
occurs when a read/write head touches the surface of a platter
compiler
converts entire source program into machine language at one time
wide area
network connects computers in a large geographical area
integrated circuit
microscopic pathway that carries an electrical current
refresh rate
speed that monitor redraws images on screen
dedicated line
type of connection that always is established
Internet Service Provider
regional or national access provider
smart card
stores data on a thin microprocessor embedded in the card
COBOL
widely used procedural language for business
visual
programming language that provides a graphic interface for creating source code
pseudocode
abbreviated form of English to outline program logic
cluster
consists of two to eight sectors
dead code
program instruction that is never executed
port
interface to the system unit
machine language
each computer can understand directly only one language called
ethernet
LAN technology that allows PCs to contend for access to the network
emoticons
express feelings
cylinder
vertical section passing through all platters
test data
sample data that mimics the real data that a program will process in production
GPS receiver
on a computer chip is worn as a watch or a chain to track parolees
ghosting
screen savers developed to prevent this
e-commerce
business transactions over an electronic network
solid line
connects symbols to show direction
downloading
process of a computer receiving information from a server
printer
output device that produces text on a physical medium
syntax
set of rules and grammar
GPS
consists of one or more earth based receivers that accept signals from satellites
user name
unique combination of characters that identifies a user
dots per inch
measures printer resolution
field
combination of one or more related characters or bytes
fax
device that transmits & recieves documents over telephone lines
network topography
layout of devices in a communications network
communications software
consists of programs that help establish connection
toggle key
can be switched between 2 states
storage media
physical material on which items are kept
star
network where all devices are connected to a central computer
read/write head
mechanism that actually reads or writes items on a floppy
repetition
control structure where one or more actions are to be performed repeatedly
chip
piece of semi-conducting material no bigger than a 1/2 in square
output device
conveys information generated by a computer to a user
electromagnetic radiation
monitors produce a small amount of this
Ada
programming language originally intended to be a standard for the DOD
relational
database which stores data in tables that consist of rows and columns
operating system
set of programs that coordinates the activities between computer hardware resources
Uniform Resource Locator
unique address of a web page
search engine
software that finds web pages/sites
paging
technique of swapping items between memory and storage
input device
hardware that allows you to enter programs
database administrator
creates and maintains the data dictionary
register
temporary storage location that holds data & instructions in the processor
dot pitch
measure of image clarity determined by vertical distance between pixels
C++
object oriented programming language
machine independent
language which can run on many different types of computers
bit
smallest unit of data
cursor
device that looks similar to a mouse but has a window with cross hairs
bugs
errors in syntax or logic
data type
specifies the kind of data a field can contain
structured query language
most relational database products for mainframes include
operating system
loaded into memory from the computer's hard disk at start
input/output
shown by a parallelogram in a flow chart
proprietary
privately owned software limited to a specific vendor
RPG
primarily used for application development on IBM
computer communication
process in which one computer transfers data to another computer
user interface
part of the software with which you interact
nanosecond
billionth of a second
transistor
acts as an electric switch that open and closes the circuit
digital signal
consists of individual electrical pulses that represent bits
macro
series of statements that instructs an application how to complete a task
information
data processed by a computer
buffer
area of storage in which data is placed while waiting to be transferred to the printer
bar code
ID code that consists of a set of vertical lines and spaces
formatting
process of preparing a disk for reading and writing
single user/multitasking
operating system that allows a single user to work three applications from the memory at the same time
query
retrieve specific data in a database
address
unique number identifying location of a byte in memory
track
narrow recording band that forms a full circle on a disk
validity check
analyzes entered data to ensure that it is correct
resolution
density of dots that determines the sharpness of an image
booting
process of starting a computer by loading an operating system
decoding
process of translating instruction into signals the computer can execute
sequential access
refers to reading or writing data consecutively
assembly language
instructions are written using symbolic instruction codes
keyguard
metal or plastic plate placed over keyboard to allow users to rest their hands w/o pressing keys
swap file
area of hard disk used for virtual memory
solution algorithm
written description of the step by step procedures for a module
hardware
input/output devices, system unit, communication/storage devices
buses
used to transfer bits from input devices to memory
kiosk
free standing computer usually with a touch screen
access time
speed of a storage device
table
file in a relational database
data warehouse
huge database that stores historical transactions
object query language
every object-oriented database uses a query language called
cache
stores frequently used instructions & data
fragmented
when contents of a file are scattered across two or more sectors, the file is

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