3D Graphics Interview Questions & Answers

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The reflection is actually the transformation that produces a mirror image of an object. For this use some angles and lines of reflection.

Transformation is the process of introducing changes in the shape size and orientation of the object using scaling rotation reflection shearing & translation etc.

The time it takes the emitted light from the screen to decay one tenth of its original intensity is called as persistence.

Characteristics of Unity is

☛ It is a multi-platform game engine with features like ( 3D objects, physics, animation, scripting, lighting etc.)
☛ Accompanying script editor
☛ MonoDevelop (win/mac)
☛ It can also use Visual Studio (Windows)
☛ 3D terrain editor
☛ 3D object animation manager
☛ GUI System
☛ Many platforms executable exporter Web player/ Android/Native application/Wii
☛ In Unity 3D, you can assemble art and assets into scenes and environments like adding special effects, physics and animation, lighting, etc.

You’re probably aware that hiring and training new employees is where companies spend the bulk of their money. Therefore, they try to reduce the number of times they have to do it. Convince your prospective employer that you’re there for the duration and you’ll be ahead of the game.

Explain how this position fits into your long-term career goals and that you’re not just settling for this job until something better comes along. Explain what you find challenging about the role as well as where you believe your experience can be an asset.

Random scan is a method in which display is made by electronic beam, which is directed only to the points or parts of the screen where picture is to be drawn.

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.

The emissive display converts electrical energy into light energy. The plasma panels, thin film electro-luminescent displays are the examples. The Non-emissive are optical effects to convert the sunlight or light from any other source to graphic form. Liquid crystal display is an example.

The shearing transformation actually slants the object along the X direction or the Y direction as required. ie; this transformation slants the shape of an object along a required plane.

In raster scan display, at the end of one frame, the electron beam returns to the left top corner of the screen to start the next frame.

The line type, width and color are the attributes of the line. The line type include solid line, dashed lines, and dotted lines.

The merits and demerits of the Penetration techniques areas follows. It is an inexpensive technique. It has only four colors. The quality of the picture is not good when it is compared to other techniques. It can display color scans in monitors. Poor limitation etc.

Following are the differences between vector and raster graphics-
☛ 1. Raster or Bitmap images are resolution dependent because of this its not possible to increase or decrease their size without sacrificing on image quality.
☛ While vector based image are not dependent on resolution. The size of vector image image can be increased or decreased without affecting image quality.
☛ 2. Raster or bitmap images are always rectangular in shape, Vector image, however, can have any shape.
☛ 3. Unlike raster image, vector image can’t be use for realistic images. This is because vector images are made up of solid color areas and mathematical gradients, so they can’t be used to show continuous tones of a colors in a natural photograph.

A line is of infinite extent can be defined by an angle of slope q and one point on the line P=P(x,y). This can also be defined as y=mx+C where C is the Y intercept.

In raster scan display, the electron beam return to the left of the screen after refreshing each scan line, is called horizontal retrace of the electron beam.

The merits and demerits of direct view storage tubes[DVST] are as follows. It has a flat screen. Refreshing of screen is not required. Selective or part erasing of screen is not possible. It has poor contrast Performance is inferior to the refresh CRT.

A Unity3D files are scene web player files created by Unity; an application used to develop 3D games. These files consist of all assets and other game data in a single archive, and are used to enable gameplay within a browser that has the Unity Web Player Plugin. The assets within a 3D unity file are saved in a proprietary closed format.

In computer graphic, image scaling is the process of resizing a digital image. scaling is a non-trivial process that involves a trade off between efficiency, smoothness and sharpness. With bitmap graphics, as the size of an image is reduced or enlarged, the pixels which comprise the image become increasingly visible, making the image appear “soft” if pixels are averaged, or jagged if not.

The process of adjusting intensities of the pixels along the line to minimize the effect of aliasing is called ant aliasing.

In plasma panel display, the region between two glass plates is filled with neon gas. In thin film electroluminescent display, the region between two glasses plates are filled with phosphor, such as zinc sulphide doped with manganese.

A major task of the display processor is digitizing a picture definition given in an application program into a set of pixel-intensity values for storage in the frame buffer. This digitization process is called scan conversion.

When a key is pressed on the keyboard, the keyboard controller places a code carry to the key pressed into a part of the memory called as the keyboard buffer. This code is called as the scan code.

Impact printer press formed character faces against an inked ribbon on to the paper. A line printer and dot-matrix printer are examples. on-impact printer and plotters use Laser techniques, inkjet sprays, Xerographic process, electrostatic methods and electro thermal methods to get images onto the papers. Examples are: Inkjet/Laser printers.

Unity 3D is a powerful cross-platform and fully integrated development engine which gives out-of-box functionality to create games and other interactive 3D content.

Video controller is used to control the operation of the display device. A fixed area of the system is reserved for the frame buffer, and the video controller is given direct access to the frame buffer memory.

Beam penetration method, shadow mask method.