08-05-2013, 04:49 PM
Computer Graphics Important Question with Answer
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Q1. What do you mean by computer graphics?
Ans. The branch of science and technology concerned with methods and techniques for converting data
to or from visual presentation using computers.
Q2.What are the applications of computer graphics?
Ans. 1. Computer Aided Design
2. Graphical User Interface
3. Entertainment
4. Simulation and Training
5. Education and Presentation
6. Computer Generated Art
7. Scientific Visualization
8. Image Processing
9. Virtual reality
10. Cartography
Q3.What do you mean by interactive computer Graphics?
Ans. Interactive computer Graphics like a website, it is only useful if it is browsed by a visitor and no
two visitors are exactly alike. It means the website must support the interaction of users with a variety of
skills, interests and end goals. Interactive computer graphics involves the user’s interaction.
Q4. What do you mean by GUI?
Ans. GUI stands for Graphical user interface. A major component of a GUI is a window manager that
allows a user to display multiple-window areas. To make a particular window active we simply click in
that window using an interactive pointing device. Interfaces also display menus and icons for fast
selection of processing options or parameter values.
Q5. What does it mean by RGB?
Ans. The RGB is a color model, it is an additive color model in which red, green, and blue light are
added together in various ways to reproduce a broad array of colors. The name of the model comes from
the initials of the three additive primary colors, red, green, and blue. The main purpose of the RGB color
model is for the sensing, representation, and display of images in electronic systems, such as televisions
and computers, though it has also been used in conventional photography.
Q6. Define VDU?
Ans. A monitor or display (sometimes called a visual display unit) is a piece of electrical equipment
which displays images generated by devices such as computers, without producing a permanent record.
The monitor comprises the display device, circuitry, and an enclosure. The display device in
modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD), while older
monitors use a cathode ray tube (CRT).
Q7. Define persistence in terms of CRT Phosphorous.
Persistence is the one of the major property of phosphorous used in CRT’s. It means how long they
continue to emit light after the electron beam is removed.
Q8. Define resolution.
The maximum number of points that can be displayed without overlap on a CRT is referred to as the
resolution.
Q8. What do you mean by an aspect ratio?
Aspect ratio is a number which gives the ratio of vertical points to horizontal points necessary to
produce equal length lines in both directions on the screen. An aspect ratio of ¾ means that a vertical
line plotted with three points has same length as a horizontal line plotted with 4 points.
Q9.What are the different properties of phosphorus?
1. Color
2. Persistence