Interview Questions.

Q1. What Are The Hardware Devices Used For Computer Graphics?

The hardwares devices used for the computer photos are

Input Devices: Keyboard, Mouse, Data tablet, Scanner, Light pen, Touch display, Joystick

Output Devices: Raster Devices- CRT, LCD, LED, Plasma displays, Printers,Vector Devices- Plotters, Oscilloscopes

Q2. What Is Trlation?

Trlation is the manner of changing the location of an item in a immediately-line path from one coordinate area to every other. Every factor (x , y) within the object must beneath pass). The trformation is:xpoint is a most fundamental graphical detail & is absolutely defined with the aid of a pair of person coordinates (x, y).

Q4. What Is Run Length Encoding?

Run period encoding is a compression technique used to save the intensity values within the frame buffer, which shops every scan line as a hard and fast of integer pairs. One quantity every pair shows an depth value, and 2d quantity specifies the quantity of adjoining pixels on the test line which can be to have that depth cost.

Q5. What Is Rotation?

A 2-D rotation is achieved through repositioning the coordinates along a round path, in the x-y plane by making an attitude with the axes. The trformation is given with the aid of:X4 pages consistent with minute.

@decision is about 360d.P.I. Therefor higher print excellent is carried out.

@The working value could be very low. The only element that requires alternative is ink cartridge.

@Four colours cyan, yellow, magenta, black are to be had.

Q7. What Is Shearing?

The shearing trformation actually slants the object along the X path or the Y path as required. Ie; this trformation slants the form of an item alongside a required aircraft.

Q8. What Is The Difference Between Impact And Non-impact Printers?

Impact printer press shaped person faces against an inked ribbon directly to the paper. A line printer and dot-matrix printer are examples. On-effect printer and plotters use Laser techniques, inkjet sprays, Xerographic manner, electrostatic techniques and electro thermal techniques to get pictures onto the papers. Examples are: Inkjet/Laser printers.

Q9. What Are The Advantages Of Electrostatic Plotters?

Following are the blessings of electrostatic plotters-

@They are faster then pen plotters and very high pleasant printers.

@Recent electrostatic plotters includes a test conversion functionality.

@shade electrostatic plotters are to be had. They make a couple of passes over the paper to devise coloration picture.

Q10. Write The Difference Between Vector And Raster Graphics?

Following are the differences among vector and raster photos-

@Raster or Bitmap photographs are resolution based due to this its not feasible to increase or decrease their size with out sacrificing on picture excellent.

While vector based photograph are not dependent on decision. The size of vector photo image can be expanded or reduced with out affecting photograph first-class.

@Raster or bitmap snap shots are usually rectangular in form, Vector photo, but, could have any form.

@Unlike raster photo, vector image can’t be use for sensible images. This is due to the fact vector snap shots are made from stable coloration areas and mathematical gradients, so as to’t be used to expose continuous tones of a hues in a herbal photograph.

Q11. What Is Reflection?

The mirrored image is absolutely the trformation that produces a mirror image of an object. For this use a few angles and lines of mirrored image.

Q12. Define Computer Graphics.

Computer pictures stays one of the most present and hastily growing pc fields. Computer graphics perhaps described as a pictorial illustration or graphical representation of objects in a pc.

Q13. What Is Persistence?

The time it takes the emitted light from the screen to decay one 10th of its authentic depth is referred to as as endurance.

Q14. What Are The Various Attributes Of A Line?

The line kind, width and shade are the attributes of the road. The line kind include strong line, dashed lines, and dotted strains.

Q15. List Out The Merits And Demerits Of Penetration Techniques?

The deserves and demerits of the Penetration techniques regions follows. It is an inexpensive technique. It has best 4 colors. The high-quality of the picture is not correct when it's far in comparison to different techniques. It can show color sc in monitors. Poor dilemma etc.

Q16. Write The Properties Of Video Display Devices?

Properties of video display gadgets are staying power ,decision, and aspect ratio.

Q17. What Is Filament?

In the CRT, warmness is applied to the cathode with the aid of directing a modern-day via a coil of twine, is called filament

Q18. Write Short Notes On Lines?

A line is of limitless volume can be defined via an perspective of slope q and one factor on the road P=P(x,y). This can also be described as y=mx+C wherein C is the Y intercept.

Q19. What Is Aspect Ratio?

The ratio of vertical factors to the horizontal factors vital to produce duration of strains in each directions of the screen is referred to as the Aspect ratio. Usually the element ratio is ¾.

Q20. Define Pixel?

Pixel is shortened kinds of image detail. Each screen factor is referred to as pixel or pel.

Q21. What Is Bitmap?

Some device has handiest one bit in keeping with pixel; the frame buffer is often called bitmap.

Q22. What Are The Two Classifications Of Shear Trformation?

X shear, y shear.

A factor (four,3) is turned around counterclockwise by means of an angle of45°. Find the rotation matrix and the consequent factor

Q23. What Is Vertical Retrace Of The Electron Beam?

In raster test display, at the quit of 1 frame, the electron beam returns to the left pinnacle nook of the display to begin the following frame.

Q24. What Is Horizontal Retrace Of The Electron Beam?

In raster test display, the electron beam go back to the left of the display after refreshing each test line, is referred to as horizontal retrace of the electron beam.

Q25. List Out The Merits And Demerits Of Dvst?

The deserves and demerits of direct view garage tubes[DVST] are as follows. It has a flat display. Refreshing of display isn't always required. Selective or component erasing of display is not viable. It has negative assessment Performance is not as good as the refresh CRT.

Q26. What Is Scaling In Computer Graphics?

In laptop photograph, picture scaling is the process of resizing a virtual photo. Scaling is a non-trivial manner that involves a exchange off between performance, smoothness and sharpness. With bitmap pictures, as the dimensions of an photo is decreased or enlarged, the pixels which comprise the photograph emerge as an increasing number of seen, making the photograph appear “gentle” if pixels are averaged, or jagged if not.

Q27. What Is Scaling?

A 2-D rotation is performed by repositioning the coordinates along a round direction, in the x-y plane by making an angle with the axes. The trformation is given by = r cos (q + f) and Yprocess of fixing intensities of the pixels along the road to minimize the effect of aliasing is known as ant aliasing.

Q29. What Is Computer Graphics?

The time period computer photos include nearly every issue on laptop that isn't always textual content or sound. It is an art of drawing photographs, traces. Charts, etc. The use of computer systems with the assist of programming. Or we can say that images is the illustration and manipulation of picture information via computer with the help from specialized software program and hardware. Graphic designing is performed the use of the various available softwares for computer systems that may produce the 3-D snap shots in the required form and dimension. Computer snap shots assist us in getting the real display studies.

 

Q30. What Is Meant By Scan Code?

When a secret's pressed at the keyboard, the keyboard controller places a code carry to the important thing pressed into a part of the memory referred to as because the keyboard buffer. This code is known as because the experiment code.

Q31. What Is Trformation?

Trformation is the procedure of introducing adjustments in the form length and orientation of the item the use of scaling rotation mirrored image shearing & trlation and many others.

Q32. List Out The Merits And Demerits Of Plasma Panel Display?

Merits. Refreshing isn't required. Produce a completely consistent image free of Flicker. Less bulky than a CRT. Demerits. Poor resolution of as much as 60 d.P.I. It calls for complex addressing and wiring. It is more expensive than CRT.

Q33. What Is Resolution?

The maximum range of factors that may be displayed without overlap on a CRT is known as the decision.

Q34. What Is Frame Buffer?

Picture definition is stored in a reminiscence area known as body buffer or refresh buffer.

Q35. Define Circle?

Circle is defined with the aid of its center xc, yc and its radius in person coordinate devices. The equation of the circle is (x-xc) + (yyc)= r2.

Q36. What Do You Mean By Emissive And Non-emissive Displays?

The emissive display converts electric energy into light strength. The plasma panels, skinny film electro-luminescent shows are the examples. The Non-emissive are optical consequences to transform the daylight or mild from any other supply to graphic shape. Liquid crystal show is an instance.

Q37. What Is Pix Map?

Some system has more than one bits in keeping with pixel, the frame buffer is frequently known as pix map.

Q38. Write The Types Of Clipping?

Point clipping, line clipping, place clipping, text clipping and curve clipping.

Q39. Short Notes On Video Controller?

Video controller is used to manipulate the operation of the show device. A fixed location of the device is reserved for the frame buffer, and the video controller is given direct get admission to to the body buffer reminiscence.

Q40. What Are The Raster And Vector Graphics?

The Raster and Vector pictures may be defined as-

RASTER- In laptop portraits photo, or BITMAP, is a dot matrix facts shape representing a usually rectangular grid of pixels or points of color, viewable via a display, paper, or other display medium. Raster image are stored in picture documents with varying codecs.

VECTOR- Vector pics is the use of geometrical primitives inclusive of factors, traces, curves, and shapes or polygon, that are all based on mathematical expressions, to represent photo in pc graphics. “Vector”, on this context, implies more than a immediately line.

Q41. Name Any Four Input Devices?

Four enter gadgets are keyboard, mouse, photograph scanners, and trackball.

Q42. Define Random And Raster Scan Displays?

Random experiment is a way in which display is made with the aid of electronic beam, which is directed most effective to the factors or parts of the display screen wherein photograph is to be drawn.

The Raster scan machine is a scanning approach in which the electron sweep from top to backside and from left to proper. The intensity is grew to become on or off to mild and un-light the pixel.

Q43. What Is Scan Conversion?

A most important task of the show processor is digitizing a photograph definition given in an utility program into a hard and fast of pixel-intensity values for garage in the body buffer. This digitization procedure is called scan conversion.

Q44. Differentiate Plasma Panel Display And Thin Film Electroluminescent Display?

In plasma panel show, the place between  glass plates is packed with neon fuel. In skinny movie electroluminescent show, the region among two glasses plates are packed with phosphor, including zinc sulphide doped with manganese.

Q45. What Is Rasterization?

The method of figuring out the correct pixels for representing photograph or pics item is known as rasterization.

Q46. Write The Two Techniques For Producing Color Displays With A Crt?

Beam penetration technique, shadow masks method.

Q47. Where The Video Controller Is Used?

A unique cause processor, which is used to manipulate the operation of the display device, is called video controller or show controller.

Q48. Write The Important Applications Of Computer Graphic?

Following are the packages of pc image

@laptop portraits is used inside the field of computer aided design.

@It is used to provide illustrations for reports or to generate slide for with projections.

@Computer graphic methods are extensively utilized in each pleasant are and industrial are applications.

@The artist uses a combination of 3-D modeling applications, texture mapping, drawing packages and CAD software program.

@In the field of enjoyment CG techniques at the moment are generally used in making movement pictures. Tune videos and television suggests.

@Computer-generated fashions of bodily, economic and monetary systems are frequently used as instructional aids.