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In this fast-forwarding area of technology, the main aim of all mobiles phone and computer companies is high-resolution graphics. The demand of users for crystal clear graphics with high visibility is increasing. Now advanced graphics are being used in our smartphones too. We mostly hear that the graphic is not supporting or insufficient, but most people do not know the details about the graphics. So here we are going to discuss some Computer graphics important questions. These questions are also very important for the students who are reading computer graphics subjects in their course.
Here are some important questions and answers about computer graphics which are mostly included in all types of graphics examinations
Question 1. What is computer graphics?
Answer- The term computer graphics includes everything on a computer that is not text or sound. It is the art of drawing pictures, and lines. charts, images, etc. We draw these all by using computers with the help of programming. Graphic designing is done by using various software for computers that can produce 3-D images in the required shape and dimension. Computer graphics help us in getting a display on a computer screen.
Question 2. Write the important applications of computer graphics.
Answer- Following are the applications of computer graphic
3. What is meant by the scan code?
When a key is pressed on the keyboard, the keyboard controller places a code carried to the key pressed into a part of the memory called the keyboard buffer. This code is called the scan code.
4. What is meant by refreshing of the screen?
Some method is needed for maintaining the picture on the screen. Refreshing of the screen is done by keeping the phosphorus glowing to redraw the picture repeatedly. (i.e.) By quickly directing the electronic beam back to the same points.
Answer- The Raster and Vector graphics can be defined as-
RASTER- In computer graphics raster graphics or bitmap graphics, are digital images that are composed of tiny rectangular pixels. Almost all types of images on the computer screen are raster graphics.
The file size of a raster image depends on the size of the image, and the number of pixels being used in the image. This means that an image with a 1280×720 resolution will contain 921,600 pixels while a full HD 1920×1080 image will have 2,073,600 pixels in numbers.
VECTOR- A vector graphic is a type of image. Vector images are graphical representations of mathematical objects such as lines, curves, and polygons. These graphics are generated by computers and they follow the x and y-axis as their reference definition.
The Quality of Vector graphics remains the same on the big and small size of the image but in raster graphics quality decrease when we increase the size of an image.
Question-6 Write the difference between vector and raster graphics?
Answer-Following are the differences between vector and raster graphics-
Question-7 What is scaling in computer graphics?
Answer- In computer graphics, image scaling is the process of resizing an image presented on screen. Scaling is a non-trivial process that is way quality will be changed with travailing. In the raster image, as the image’s size increases, the image’s quality will decrease.
Question-8 What are the hardware devices used for computer graphics?
Answer- The hardware devices used for the computer graphics are given below
Input Devices: These devices are used to get input for the computer such as
Keyboard, Mouse, Scanner, Light pen, Touch screen, Joystick, cam and etc.
Output Devices: These devices are used to get output from the computer such as Raster Devices- CRT, LCD, LED, Plasma screens, Printers Vector Devices- Plotters, and Oscilloscopes.
Question-9 What are the features of inkjet printers?
Answer- Some features of inkjet printers are as follows:
Question-10 What are the advantages of electrostatic plotters?
Answer- Some advantages of electrostatic plotters are:
Question-11 What is meant by the scan code?
Answer– As a key is pressed on the keyboard, the keyboard controller places a code carried to the key pressed into the part of the memory called a keyboard buffer. This code is called a scan code.
Question-12 Define Random and Raster scan displays.
Answer– In computer graphics: A random scan is a method in which the display is made by an electronic beam, which is directed only to the points or parts of the screen where the picture is to be drawn.
Raster Scan Display: The Raster scan system is a scanning technique in which the electron sweep from top to bottom and from left to right. The intensity is turned on or off to light and un-light the pixel.
