Computer Terminology Notes (By Alphabet D) for Competitive Exams
D
Data Administration System:
The group within the technical support area responsible for defining data requirements within an organization and setting up controls or managing the data.
Database:
A database is simply a collection of data put together to serve a particular requirement. An example of database is a card file kept in a school office that contains records of each student in a class - name, address, phone number, parents names, fees payment details etc.,
Data Communication:
The transmission of data between two or more separate physical sites through use of public and/or private communication channels or lines.
Data Control System:
The group within a computer installation responsible for meeting quality control standards for processing and for collecting input from and delivering output for computer users.
Data Dictionary:
A document listing and defining all items or processes represented in data flow diagrams or used within a system
Data Entry:
Any process of entering data into a computer. Usually as a job description, data entry means typing information into a database program.
Data Management System:
System software that supervises the handling of data required by programs during execution.
DBMS (Data Base Management System):
Software to manage and control data resources.
Debug:
To trance and eliminate mistakes in a program or fault in equipment.
Decision Table:
A table listing all the contingencies to be considered in description of a problem, together with the corresponding actions to be taken. Decision table permit complete decision making criteria to be expressed in a concise and logical format. They are sometimes used in place of flowcharts for problem definitions and documentation. Compilers have been written to convert decision tables into programs that can be execute by the computers.
Desk Checking:
A manual checking process in which representative data items, used for detecting errors in program logic, are traced through the program before the letter is checked on the computer.
Digital:
A representation of any quantity by binary numbers or codes.
Digitize:
The process of converting line, drawing, and picture to digital form by scanning the drawings and pictures with a device.
Direct Access Records:
A hardware unit that can read and write records from or to a file without processing all preceding records.
Direct Data Entry:
Entry of data directly into the computer through machine-readable source documents or through use of on-line terminals. Entry is a by-product of business transactions, without requiring manual transcription from original paper documents.
DSL (Digital Subscriber Line):
DSL is an Asymmetric Digital Subscriber line modem technology that transports ordinary telephone lines, also known as "twisted copper pairs" into high-speed digital lines for "Instant Internet Access". This technology is providing the incredible growth of high-speed data communications and interactive nodes.
Directory (Folder):
The name of the file, the length of the file and the data and time of creation are stored in another reserved area on the disk called the directory (also called a folder). The directory is used by the system as a quick reference to what is stored on the disk.
Display Devices:
The display devices currently used with computers display text as well as graphics. A display device that displays both the text and graphic is called a graphic display device. There are three categories of display screen technology
Data Entry:
Any process of entering data into a computer. Usually as a job description, data entry means typing information into a database program.
Data Management System:
System software that supervises the handling of data required by programs during execution.
DBMS (Data Base Management System):
Software to manage and control data resources.
Debug:
To trance and eliminate mistakes in a program or fault in equipment.
Decision Table:
A table listing all the contingencies to be considered in description of a problem, together with the corresponding actions to be taken. Decision table permit complete decision making criteria to be expressed in a concise and logical format. They are sometimes used in place of flowcharts for problem definitions and documentation. Compilers have been written to convert decision tables into programs that can be execute by the computers.
Desk Checking:
A manual checking process in which representative data items, used for detecting errors in program logic, are traced through the program before the letter is checked on the computer.
Digital:
A representation of any quantity by binary numbers or codes.
Digitize:
The process of converting line, drawing, and picture to digital form by scanning the drawings and pictures with a device.
Direct Access Records:
A hardware unit that can read and write records from or to a file without processing all preceding records.
Direct Data Entry:
Entry of data directly into the computer through machine-readable source documents or through use of on-line terminals. Entry is a by-product of business transactions, without requiring manual transcription from original paper documents.
DSL (Digital Subscriber Line):
DSL is an Asymmetric Digital Subscriber line modem technology that transports ordinary telephone lines, also known as "twisted copper pairs" into high-speed digital lines for "Instant Internet Access". This technology is providing the incredible growth of high-speed data communications and interactive nodes.
Directory (Folder):
The name of the file, the length of the file and the data and time of creation are stored in another reserved area on the disk called the directory (also called a folder). The directory is used by the system as a quick reference to what is stored on the disk.
Display Devices:
The display devices currently used with computers display text as well as graphics. A display device that displays both the text and graphic is called a graphic display device. There are three categories of display screen technology
- Cathode Ray Tube (CRT)
- Liquid Crystal Display (LCD)
- Light Emitting Diode (LED)
- Projection Displays
Domain Name:
The "address" or URL of a particular web site. In http://www.guide4govtjobs.com, guide4govtjobs is the domain name.
Download:
Transfer of a computer file from another computer to one's own computer.
Downloading:
The process of sending a program or data from a large computer system to a smaller remote computer. When you have a web page into your bowser you are essentially downloading the paper from the remote host's server.
Dump:
To copy the contents of a set of storage locations, usually from an internal storage device (such as core storage) to an external storage medium, (Such as magnetic tape, Compact Disk), and usually for diagnostic or return processes.
Dynamic Processing:
The technique of snapping jobs in and out of computer memory according to their priorities and the number of times slices allocated to each task.
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