QUICK GLANCE FOR NET EXAM -6



Mouse Movements : The mouse points to the location of the desired item on the screen with the help of a cursor called mouse pointer.
My Computer : My Computer gives a quick overview of all the files and programs available in the system. Any program installed shall get into ‘My computer’ folder automatically.
My Documents : It gives a quick overview of all the documents saved in the system. Any document that is saved gets into My Documents folder automatically. Besides these basic components, many other icons can be kept on the desktop.
Network : It helps to get a glimpse of what is available with other Neighborhood computers on the network.
Pointing : Pointing refers to the positioning of the mouse pointer at a specific location on the screen.
Recycle Bin : It keeps all deleted files, to retrieve them later.
Release : A minor upgrade in a software product. It is usually indicated by a change in number after the decimal point such as 3.0, 3.1, 3.11, 3.2, etc.
Use of year : Occasionally software developers prefer to add the year of release to a new version rather than a numeral for their products. For example, Windows 95 (but not, Windows 4.0),
Windows 98, Windows 2000, etc.
Version : A major upgrade in a software product. It is usually indicated by numbers such as 2.0, 3.0, etc.
Application program : Program that has been developed to solve a particular problem, perform useful work on general purpose tasks, or provide entertainment
Assembly language : It is a low level programming language that allows a computer user to write a program using abbreviations or more easily remembered words instead of numbers.
Compiler : A language translator that converts the entire program of a high-level language into machine language before the computer executes the program.
High level language : Also known as the procedural language it resembles human languages such as English.
Interpreter : A language translator that converts each procedural language statement into machine language and executes it immediately.
Machine language : A binary type low-level language consisting of 1s and 0s that the computer can run directly.
System program : Program that helps the computer to perform essential operating tasks and enables the application program to run.
Attenuation : Loss of signal power caused by the communication media.
Bipolar : Representation of digital signals using voltages of different polarities.
Carrier : A high frequency signal that carries information signals.
Coaxial cable : Pair of conductors placed in the form of concentric cylinders along the same axis.
Communication media : Media like copper and optical cables used in telecommunication.
Communication system : Any telecommunication system like electrical or satellite communication system.
Decoding : Performing mathematical operations on coded signals to detect and possibly
correct errors if any.
Demodulation : Extraction of base signals from the high frequency carrier.
Demultiplexing : Extraction of different information signals from a multiplexed stream of
Signals
Digital communication : A form of communication in which information is represented and
transmitted by one's and zero's
Encoding (coding) : Performing some defined mathematical operations on digital signals to improve  reliability and efficiency.
Energy form : Electrical, optical or electromagnetic energy
Fourier analysis : Analysis of complex waveform in terms of simple pure waves.
Frequency spectrum : Range of frequencies in telecommunication systems.
Geostationary satellite : A satellite whose instantaneous angular velocity and mean orbital period are the same as that of earth.
Geosynchronous satellite : A satellite whose mean orbital period is the same as the period of revolution of earth, but its instantaneous angular velocity may differ slightly from that of
earth’s rotational speed.
Injection laser diode (ILD) : An optical source that produces sharp light beam when current is applied to it.
Light emitting diode (LED) : A low-cost optical source that produces light when electric current is applied to it.

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