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Discovering Computers Fundamentals 2011 - Chapters 1-12
Final Exam Review
210
Computer Science
Undergraduate 1
12/12/2010

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Term
Computer
Definition
an electronic device, operating under the control of instructions stored in its own memory
Term
Literacy
Definition
entails having knowledge and understanding of computers and their uses
Term
Storage
Definition
data, instructions, and information on a computer
Term
Hardware
Definition
computer contains many electric, electronic, and mechanical components
Term
Input Device
Definition
Allows you to enter data and instructions into a computer
Term
Output Device
Definition
Hardware component convey information to one or more people
Term
System Unit
Definition
Case containing the electronic components of the computer which are used to process data
Term
Storage Device
Definition
Holds data, instructions, and information for future use
Term
Communications Device
Definition
Enables a computer to send and receive data, instructions, and information to and from one or more computers or mobile devices
Term
Software
Definition
a series of instructions which tells the computer what to do and how to do it
Term
Operating System
Definition
a set of programs which coordinates all the activities among computer hardware devices.
Term
Utility Program
Definition
system is a type of system which allows a user to perform maintenance-type tasks usually related to managing a computer, its devices, or its programs
Term
Categories of Computers
Definition
Personal computers , Mobile computers and mobile devices
Game consoles
Servers
Mainframes
Supercomputers
Embedded computers
Term
Supercomputer
Definition
is the fastest, most powerful computer; the fastest supercomputers are capable of processing more than one quadrillion instructions in a single second
Term
Embedded Computer
Definition
is a special-purpose computer which functions as a component in a larger product
Term
Embedded Computers Are In
Definition
Consumer Electronics, Home Automation Devices, Automobiles, Process Controllers, Robotics, Computer Devices, Ofice Machines
Term
Telecommuting
Definition
a work arrangement in which employees work away from a company’s standard workplace and often communicate with the office through a computer
Term
Internet
Definition
a worldwide collection of networks linking millions of businesses, government agencies, educational institutions, and individuals
Term
IP address
Definition
a number which uniquely identifies each computer or device connected to the Internet
Term
Domain Name
Definition
the text version of an IP address
Term
IP Address
Definition
72.14.207.99
Term
Doman Name
Definition
www.google.com
Term
Top Level Doman Name
Definition
.com
Term
World Wide Web or Web
Definition
consists of a worldwide collection of electronic documents
Term
Web pages
Definition
worldwide collection of electronic documents
Term
URL / web address
Definition
Uniform Resource Locator
Term
Protocol
Definition
http://
Term
Path
Definition
path to a specific web page grsm/planyourvisit
Term
13 ( types ) of Web sites
Definition
Portal, News, Informational, Business / Marketing, Blog, Wiki, Online Social Network, Educational, Entertainment, Advacocy, Web Application, Content Aggregator, Personal
Term
Wiki
Definition
a collaborative Web site which allows users to add to modify, or delete the Web site content via their Web browser
Term
Content Aggregator
Definition
a business which gathers and organizes Web content and then distributes, or feeds, the content to subscribers for free or a fee
Term
Multimedia
Definition
refers to any application which combines text with Graphics, Animation, Audio, Video, Virtual Reality
Term
Graphic
Definition
a digital representation of nontext information
Term
Graphic formats
Definition
BMP, GIF, JPEG, PNG, and TIFF
Term
Thumbnail
Definition
a small version of a larger graphic
Term
Audio
Definition
includes music, speech, or any other sound
Term
MP3 format
Definition
reduces an audio file to about 1/10 its original size, but preserves much of the original quality of the sound
Term
Streaming
Definition
the process of transferring data in a continuous and even flow
Term
Plug-In
Definition
a program which extends the capability of a Web browser
Term
Popular Plug-In's
Definition
Acrobat Reader, Flash Player, Java, QuickTime, Real Player, Shockwave Player, Silverlight, Windows Media Player
Term
chat
Definition
a real-time typed conversation which takes place on a computer
Term
chat room
Definition
a location on an Internet server which permits users to chat with each other
Term
VoIP
Definition
(Voice over IP) enables users to speak to other users over the Internet
Term
FTP
Definition
(File Transfer Protocol) is permits file uploading and downloading
Term
Netiquette
Definition
the code of acceptable Internet behavior
Term
System software
Definition
serves as the interface between the user, the application software, and the computer’s hardware it also consists of the programs which control or maintain the operations of the computer and its devices
Term
Utility programs
Definition
type of system software that allows a user to perform maintenance type tasks usually related to managing a computer, its devices, or its programs
Term
Word processing software
Definition
allows users to create and manipulate documents
Term
Developing a document
Definition
Create a document, Edit a document, Format a document
Term
Creating a Document
Definition
Enter text and numbers , Insert Images, Perform other Documents
Term
Edit a Document
Definition
Making changes to existing content, Inserting, Deleting, Cutting, Copying, and Pasting
Term
Format a Document
Definition
Change appearance; font , font size
Term
Database
Definition
a collection of data organized in a manner which allows access, retrieval, and use of data
Term
Query
Definition
a request for specific date from a database
Term
(DB) Field Name
Definition
uniquely identifies each field
Term
(DB) Records
Definition
group of related fields
Term
Presentation software
Definition
allows users to create visual aids for presentations to communicate ideas, messages, and other information to a group
Term
software suite
Definition
a collection of individual programs available together as a unit , eg. MS Office 2010
Term
personal information manager (PIM)
Definition
is application software including appointment calendar, address book, notebook
Term
Web page authoring software
Definition
helps users of all skill levels create Web pages which include multimedia and interactive content
Term
Web-based training
Definition
is a type of CBT which uses Internet technology and consists of application software on the Web
Term
CBT
Definition
is a type of education in which students learn by using and completing exercises with instructional software
Term
System Unit
Definition
The inside of the system unit on a desktop personal computer includes; drive bays, power supply, sound card, video card, processor, memory
Term
Processor
Definition
also called the central processing unit (CPU), interprets and carries out the basic instructions which operate a computer
Term
Control unit
Definition
component of a processor that directs and coordinates most of the operations in the computer
Term
Arithmetic logic unit (ALU)
Definition
component of a processor that performs arithmetic, comparison, and other operations
Term
Kilobytes
Definition
(KB or K), # bytes 1000 / 1024, 1/2 page of text
Term
Megabyte
Definition
(MB), # bytes: 1M, 500 pages of text
Term
Gigabyte
Definition
(GB), # bytes: 1B, 500,000 pages of text
Term
Terabyte
Definition
(TB), # bytes: 1T, 500, 000, 000
Term
Memory Module
Definition
where RAM chips usually reside
Term
Memory Slots
Definition
small circuit board that houses RAM chips and is held in a memory slot on the motherboard
Term
Memory Cache
Definition
speeds the processes of the computer because it stores frequently used instructions and data
Term
RAM
Definition
The amount of RAM necessary in a computer often depends on the types of software you plan to use
Term
Read-only memory (ROM)
Definition
refers to memory chips storing permanent data and instructions
Term
Firmware Chips
Definition
permanently written data, instructions, or information
Term
Flash memory
Definition
can be erased electronically and rewritten
Term
CMOS
Definition
technology provides high speeds and consumes little power
Term
Access time
Definition
the amount of time it takes the processor to read from memory
Term
Milliseconds
Definition
1 Thousandth of a second
Term
Microseconds
Definition
1 Millionth of a second
Term
Nanoseconds
Definition
1 Billionth of a second
Term
Picoseconds
Definition
1 Trillionth of a second
Term
Bluetooth port
Definition
short range
Term
IrDA port
Definition
infrared
Term
MIDI port
Definition
music device
Term
Bus
Definition
allows the various devices both inside and attached to the system unit to communicate with each other
Term
Data Bus
Definition
is used to transfer actual data
Term
Address Bus
Definition
is used to transfer information about where the data should reside in memory
Term
Computer can have these types of Buses
Definition
System, Backside, Expansion
Term
Expansion Bus
Definition
expansion bus allows the processor to communicate with peripherals.
Term
Input Device
Definition
any data and instructions entered into the memory of a computer
Term
Keyboard
Definition
an input device which contains keys users press to enter data and instructions into a computer
Term
F3 Key
Definition
re-do
Term
Touch Screen
Definition
a touch-sensitive display device
Term
Kiosk
Definition
a freestanding computer which includes a touch screen
Term
Voice Input
Definition
the process of entering input by speaking into a microphone
Term
Voice Recognition
Definition
the computer’s capability of distinguishing spoken words
Term
Audio Input
Definition
the process of entering any sound into the computer
Term
Video Conference
Definition
a meeting between two or more geographically separated people
Term
Web Cam
Definition
Capture video and still images, Send e-mail messages with video attachments, Add live images to instant messages, Broadcast live images over the Internet, Make video elephone calls
Term
Output
Definition
data processed into a useful form
Term
Display Device
Definition
visually conveys text, graphics, and video information
Term
Monitor
Definition
packaged as a separate peripheral, eg. Widescreen and LCD
Term
Liquid crystal display (LCD)
Definition
uses a liquid compound to present information on a display device
Term
Resolution
Definition
the number of horizontal and vertical pixels in a display device.
Term
Response Time
Definition
lower the # faster the response time
Term
Brightness
Definition
higher the nits, brighter the image
Term
Dot Pitch
Definition
lower the #, the sharper the image
Term
Contrast Ratio
Definition
higher contrast ratios represent colors better
Term
DPI (Dots Per Inch)
Definition
most ink-jet printers can print from 1200 to 4800 dpi
Term
Impact (Printer)
Definition
like a dot matrix printer - actually strikes the paper
Term
Non-Impact (Printer)
Definition
forms characters and graphics on a piece of paper without actually striking the paper
Term
Storage
Definition
holds data, instructions, and information for future use
Term
Storage Medium
Definition
the physical material on which a computer keeps data, instructions, and information
Term
Capacity
Definition
is the number of bytes a storage medium can hold
Term
Kilobyte
Definition
1 Thousand / 1024
Term
Megabyte
Definition
1 Million 1,048,576
Term
Gigabyte
Definition
1 Billion
Term
Terabyte
Definition
1 Trillion
Term
Hard Disk
Definition
contains one or more inflexible, circular platters which use magnetic particles to store data, instructions, and information
Term
Head Crash
Definition
occurs when a read/write head touches the surface of a platter
Term
Back-Up
Definition
duplicate of a file, program, or disk placed on separate storage
Term
RAID
Definition
(redundant array of independent disks) is a group of two or more integrated hard disks; duplicates data and implements duplication in different ways
Term
Disk Controller
Definition
consists of a special-purpose chip and electronic circuits which control the transfer of data, instructions, and information from a disk to and from the system bus and other components of the computer
Term
Cloud Storage
Definition
an Internet service which provides storage to computer users
Term
Reasons to Subscribe to Cloud Storage
Definition
Access files from any computer, Allow others to access their files, View time-critical data and images immediately, Store offsite backups, Provide center functions
Term
Blue-ray Disc ROM
Definition
(BD-ROM) has a storage capacity of 100 GB
Term
Types of Storage
Definition
Tape, Microfiche, Microfilm, Enterprise Storage, Magnetic Stripe Cards, Smart Cards,
Term
Magnetic Strip Cards
Definition
contains a magnetic stripe which stores information
Term
Smart Card
Definition
stores data on a thin microprocessor embedded in the card
Term
Microfilm
Definition
store microscopic images of documents on a roll or sheet film
Term
Microfiche
Definition
store microscopic images of documents on a roll or sheet film
Term
Magnetic Disks
Definition
20 - 30 years
Term
Optical Discs
Definition
50 - 100 years
Term
Solid State Drives
Definition
140 years
Term
Microfilm
Definition
500 years
Term
System software
Definition
consists of the programs which control or maintain the operations of the computer and its devices
Term
Operating System Instructions
Definition
start and shut down a computer, provide a user interface, manage programs, manage memory, coordinate tasks, configure devices, est. internet connection, monitor performance, provide utilities, automatically update, control a network, administer security
Term
Booting
Definition
process of starting or restarting a computer
Term
Cold Boot
Definition
Turning on a computer has been powered off completely
Term
Warm Boot
Definition
Using the operating system to restart a computer
Term
User Interface
Definition
controls how you enter data and instructions and how information is displayed on the screen
Term
Graphical User Interface (GUI)
Definition
you interact with menus and visual images
Term
Command-Line Interface
Definition
a user uses the keyboard to enter data and instructions
Term
Driver
Definition
is a small program tells the operating system how to communicate with a specific device
Term
Plug and Play
Definition
automatically configures new devices as you install them
Term
Operating systems often provide users with the capability of
Definition
managing files, searching for files, viewing images, securing a computer, uninstalling programs, cleaning up disks, defragmenting disks, diagnosing problems, backing up files and disks, setting up screen savers
Term
Types of Operating System
Definition
stand-alone, server, embedded
Term
Disk Defragmenter
Definition
reorganizes files and unused space on a computer’s hard disk so the operating system accesses data more quickly and programs run faster
Term
Virus
Definition
a potentially damaging computer program affects a computer negatively by altering the way the computer works
Term
Worm
Definition
Copies itself repeatedly, using up resources and possibly shutting down the computer or network
Term
Trojan Horse
Definition
A malicious program hides within or looks like a legitimate program
Term
Antivirus Program
Definition
protects a computer against viruses
Term
Spyware
Definition
is a program placed on a computer without the user’s knowledge secretly collects information about the user
Term
Adware
Definition
displays an online advertisement in a banner or pop-up window
Term
Spyware Remover
Definition
detects and deletes spyware and other similar programs
Term
Adware Remover
Definition
is a program which detects and deletes adware
Term
Filters
Definition
are programs remove or block certain items from being displayed eg. Anti-spam programs, Web filters, Phishing Filters, Pop-Up Blockers
Term
File Compression Utility
Definition
shrinks the size of a file
Term
Zipped Files
Definition
compressed files that can be uncompressed
Term
Computer Communications
Definition
blogs, chat rooms, email, fax, FTP, IM, internet, newsgroups, RSS, video conferencing, VoIP, web, web 2.0, web folders, wikis
Term
Wireless Internet Access Point
Definition
allow people to connect wirelessly to the Internet from home, work, school, and in many public locations
Term
Intranet
Definition
is an internal network uses Internet technologies
Term
Extranet
Definition
is the portion of a company’s network allows customers or suppliers of a company to access parts of an enterprise’s intranet
Term
Wireless Access Point
Definition
a central communications device allows computers and devices to transfer data wirelessly among themselves or to a wired network
Term
Router
Definition
connects multiple computers or other routers together and transmits data to its correct destination on a network
Term
Bandwidth
Definition
The amount of data which travels over a communications channel
Term
Transmission Media
Definition
The amount of data which travels over a communications channel
Term
Broadband
Definition
media transmit multiple signals simultaneously
Term
Physical Transmission Media
Definition
twisted pair cable, coaxial cable, fiber optic cable
Term
Common Types of Data
Definition
text, numeric, autonumber, currency, data, memo, yes/no, hyperlink, object, attachment
Term
Validation
Definition
compares data with a set of rules or values to find out if the data is correct
Term
Types of Validation
Definition
Alphabetic/Numeric check, Range Check, Consistency Check, Completeness Check, Check Digit
Term
File Processing System
Definition
each department has it's own set of files, used for many years, have data redundancy, maintain task consume additional time, isolate data
Term
Database Approach
Definition
programs and users share data, reduce data redundancy, improve data integrity, share data, allow easier access, reduces development time , can be more vulnerable
Term
Data Model
Definition
consists of rules and standards define how the database organizes data
Term
Relational Database
Definition
store data in tables consisting of rows and columns
Term
Row (DB)
Definition
have a primary key
Term
Column (DB)
Definition
have unique names
Term
Relationship (DB)
Definition
a link within the data
Term
Multidimensional Database
Definition
can store data in more than two dimensions of data and Can consolidate data much faster than a relational database
Term
Data Warehouse
Definition
is a huge database stores and manages the data required to analyze historical and current transactions
Term
Cybercrime
Definition
Online or Internet—based illegal acts
Term
Script Kiddie
Definition
Same intent as a cracker but does not have the technical skills and knowledge
Term
Transmitted Information
Definition
Information transmitted over networks has a higher degree of security risk than information kept on an organization’s premises
Term
Rootkit
Definition
Program hides in a computer and allows someone from a remote location to take full control
Term
Spoofing
Definition
a technique intruders use to make their network or Internet transmission appear legitimate
Term
Proxy Server
Definition
a server outside a company’s network which controls the communications into the company’s network
Term
Firewall
Definition
is hardware and/or software protects a network’s resources from intrusion
Term
Computer Ethics
Definition
are the moral guidelines govern the use of computers and information systems
Term
Social Engineering
Definition
is defined as gaining unauthorized access or obtaining confidential information by taking advantage of trust and naivety
Term
System Proposal
Definition
assesses the feasibility of each alternative solution
Term
Steering Committee
Definition
discusses the system proposal and decides which alternative to pursue eg. Packaged software, custom software, outsourcing
Term
Computer Security Plan
Definition
should Identify all information assets of an organization, Identify all security risks may cause an information asset loss, For each risk, identify the safeguards exist to detect, prevent, and recover from a loss
Term
Object-Oriented Programming (OOP) Language
Definition
allows programmers the ability to reuse and modify existing objects, Objects can be reused, Programmers create applications faster, Work well in a RAD environment, Most program development tools are IDEs
Term
Assembler
Definition
programmer uses a program, To convert an assembly language source program into machine language
Term
Java
Definition
is an object-oriented programming language developed by Sun Microsystems
Term
Just-in-time (JIT)
Definition
compiler to convert the byte code into machine-dependent code
Term
Programmers write scripts, applets, servlets, or ActiveX controls using a variety of languages
Definition
JavaScript, Perl, PHP, Rexx, Tcl, VBScript
Term
Enterprise Computing
Definition
the use of computers in networks, such as LANs and WANs, or a series of interconnected networks that encompass a variety of differnet operating systems, protocols, and network architectures
Term
Types of Enterprises
Definition
retail, manufacturing, service, wholesale, government, educational, transportation
Term
Distribution Systems
Definition
perform the following functions, provide forecasting for inventory control, manage and track shipping of products, Ppovide information and analysis on inventory in a warehouse
Term
5 Categories of Information Systems
Definition
office information system, transaction processing system, management information system, decision support system, expert system
Term
Technologies Used in Enterprises
Definition
portals, electronic data interchange, data warehouse, extranet, web services, workflow, virtual private network
Term
Portal
Definition
is a collection of links, content, and services presented on a Web page are interesting for a particular job function
Term
EDI
Definition
is a set of standards controls the transfer of business data and information among computers within and among enterprises
Term
Enterprise Hardware
Definition
allows large organizations to manage and store information and data using devices geared for: heavy use, max availability, max efficiency
Term
Scalability
Definition
is a measure of how well computer hardware, software, or an information system can grow to meet increasing performance demands
Term
Interoperability
Definition
is the ability for an information system to share information with other information systems within an enterprise
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