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Definitions D-L
Vocab
44
Computer Science
11th Grade
02/23/2009

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Term
Distributed Processing
Definition
A network in which some or all of the processing, storage and control functions are dispersed among its nodes
Term
Disk Cache
Definition
RAM set aside to speed up access to a hard drive
Term
Encryption
Definition
The reversible modification of data into an unintelligible sewuence of characters using passwords and special computer programs
Term
Exception
Definition
An object that is created when an abnormal situation arises in a program
Term
Exception handler
Definition
Program code that handles exceptions
Term
Expression
Definition
A sequence of symbols that can be evaluated
Term
Fiber optic
Definition
High speed cabling used for networking. uses glass lenses to transmit data
Term
Field (object attribute)
Definition
a subdivision of a record containing a unit of information
Term
File
Definition
An organized collection of data
Term
File manager
Definition
An application software that can access, create, modify, store and retrieve files
Term
Flag
Definition
An indicator with two possible states, set or not set
Term
Formal Parameter
Definition
a routine that can be declared as a variable
Term
Formatted Output
Definition
Data prepared for output in order to be displayed in a desired format
Term
Graphics tablet
Definition
input decice where the user can use a pen/pencil like object for input
Term
GUI
Definition
graphical user interface
Term
Hacking
Definition
obtaining unauthorized access to protected resources
Term
Hexadecimal
Definition
a system of numbers with base 16. 1-9 and A-F
Term
High-level language
Definition
A programming language whose concepts and structures are convenient for human reasoning
Term
HTML
Definition
Language for constructing web pages. tags denote the way text and graphics are displayed
Term
Hub
Definition
a switch that sends data to the stations to which it is attached
Term
IDE
Definition
Programming tool that gives programmers a single environment for all tools needed such as debuggers and editors
Term
Identifier
Definition
the name or label chosen by the programmer to represent a variable, method, class, data type or any other element defined within the program
Term
interface
Definition
the hardware & software needd for communication between processors and other devices to compensate for the difference in their operation
Term
interpreter
Definition
program that translates and executes each instruction of a programming language before doing the same to the next instruction
Term
ISO
Definition
international organization for standardization
Term
Iteration
Definition
The process of repeatedly running a set of instructions until a set condition is satisfied LOOP
Term
JPEG
Definition
Joint photographic expert group
Term
Latency
Definition
time required for the disk to revolve until the disk is in the proper position for reading & writing
Term
Address bus
Definition
pathway from memory to processing unit that carries the address in its memory
Term
algorithm
Definition
an ordered set of instructions for the solution to a problem
Term
array
Definition
an arrangement of data in one or more dimensions
Term
block
Definition
the smallest unit of data that can be transferred between memory and backing store in one operation
Term
buffer
Definition
a portion of storage used to hold input or output data temporarily
Term
bus
Definition
the pathway used for sending signals between internal components of a computer
Term
bus topology
Definition
network where all devices are connected to a common cable
Term
cache
Definition
part of the main store that is between main memory and the processor. holds a copy of data + instructions that are likely to be used next
Term
CASE
Definition
computer assisted software engineering. automation of methodologies that are used in development + maintenance of products
Term
class
Definition
combination of data & operations that can be performed on that data
Term
client
Definition
computer or terminal used to access a computer based system
Term
collection
Definition
a class that holds objects
Term
constructor method
Definition
a method with the same name as the class that initializes the instance or variable
Term
CRC
Definition
class responsibility and collaboration cards --> a design tool
Term
data bus
Definition
the pathway between memory or peripheral and the processing unit --> carries data for processing or data that has been processed
Term
data integrity
Definition
correctness of data after storing, processing or transmitting
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