3D Graphics Interview Questions And Answers

Properties of video display devices are persistence ,resolution, and aspect ratio.

AssetBundles are files that can be exported from Unity to contain asset of your choice. AssetBundles are created to simply downloading content to your application.

Prefab in Unity 3D is referred for pre-fabricated object template (Class combining objects and scripts). At design time, a prefab can be dragged from project window into the scene window and added the scene’s hierarchy of game objects. If desired the object then can be edited. At the run time, a script can cause a new object instance to be created at a given location or with a given transform set of properties.

Just because this isn’t posed as a question, do not accept it as a fact. What is a fact is that despite a concern that you are overqualified, you still were granted an interview. Since interviewers don’t like wasting their time, this means they’re expecting you to answer this question well enough for them to justify hiring you.

Features of inkjet printers are
☛ 1. They can print 2 to 4 pages per minute.
☛ 2. resolution is about 360d.p.i. Therefor better print quality is achieved.
☛ 3. The operating cost is very low. The only part that requires replacement is ink cartridge.
☛ 4. Four colors cyan, yellow, magenta, black are available.

Following are the applications of computer graphic
☛ 1. computer graphics is used in the field of computer aided design.
☛ 2. It is used to produce illustrations for reports or to generate slide for with projections.
☛ 3. Computer graphic methods are widely used in both fine are and commercial are applications.
☛ 4. The artist uses a combination of 3D modeling packages, texture mapping, drawing programs and CAD software.
☛ 5. In the field of entertainment CG methods are now commonly used in making motion pictures. music videos and television shows.
☛ 6. Computer-generated models of physical, financial and economic systems are often used as educational aids.

A 2-D rotation is done by repositioning the coordinates along a circular path, in the x-y plane by making an angle with the axes. The transformation is given by:X| = r cos (q + f) and Y| = r sin (q + f).

Circle is defined by its center xc, yc and its radius in user coordinate units. The equation of the circle is (x-xc) + (yyc)= r2.

The ratio of vertical points to the horizontal points necessary to produce length of lines in both directions of the screen is called the Aspect ratio. Usually the aspect ratio is ¾.

Fixed Timestep feature helps to set the system updates at fixed time interval. A queue like mechanism will manage all real-time events that are accumulated between time epochs. If frame-rate drops below some threshold limit set for fixed timestep, then it can affect the game speed.

Computer graphics remains one of the most existing and rapidly growing computer fields. Computer graphics maybe defined as a pictorial representation or graphical representation of objects in a computer.

☛ Cache component references: Always cache reference to components you need to use your scripts
☛ Memory Allocation: Instead of instantiating the new object on the fly, always consider creating and using object pools. It will help to less memory fragmentation and make the garbage collector work less
☛ Layers and collision matrix: For each new layer, a new column and row are added on the collision matrix. This matrix is responsible for defining interactions between layers
☛ Raycasts: It enables to fire a ray on a certain direction with a certain length and let you know if it hit something
☛ Physics 2D 3D: Choose physics engine that suits your game
☛ Rigidbody: It is an essential component when adding physical interactions between objects
☛ Fixed Timestep: Fixed timestep value directly impacts the fixedupdate() and physics update rate.

The process of determining the appropriate pixels for representing picture or graphics object is known as rasterization.

The maximum number of points that can be displayed without overlap on a CRT is referred to as the resolution.

Some important Unity 3D components include

☛ Toolbar: It features several important manipulation tools for the scene and game windows
☛ Scene View: It is a fully rendered 3 D preview of the currently open scene is displayed and enables you to add, edit and remove GameObjects
☛ Hierarchy: It displays a list of every GameObject within the current scene view
☛ Project Window: In complex games, project window searches for specific game assets as needed. It explores the assets directory for all textures, scripts, models and prefabs used within the project
☛ Game View: In unity you can view your game and at the same time make changes to your game while you are playing in real time.

The difficulty of this question is directly proportional to the amount of preparation you did. If you didn’t prepare at all, this question is impossible to answer.

Demonstrate your knowledge of the company and show the interviewer you did your homework by discussing how the company’s vision and mission align with your values. If you do this at all, let alone well, you will be able to succinctly explain why you would rather work for this company than for their competitor.

Following are the advantages of electrostatic plotters-
☛ 1. They are faster then pen plotters and very high quality printers.
☛ 2. Recent electrostatic plotters includes a scan conversion capability.
☛ 3. color electrostatic plotters are available. They make multiple passes over the paper to plot color picture.

The Raster and Vector graphics can be explained as-
☛ RASTER- In computer graphics image, or BITMAP, is a dot matrix data structure representing a generally rectangular grid of pixels or points of color, viewable via a monitor, paper, or other display medium. Raster image are stored in image files with varying formats.
☛ VECTOR- Vector graphics is the use of geometrical primitives such as points, lines, curves, and shapes or polygon, which are all based on mathematical expressions, to represent image in computer graphics. “Vector”, in this context, implies more than a straight line.

Translation is the process of changing the position of an object in a straight-line path from one coordinate location to another. Every point (x , y) in the object must under go a displacement to (x|,y|). the transformation is:x| = x + tx ; y| = y+ty

Run length encoding is a compression technique used to store the intensity values in the frame buffer, which stores each scan line as a set of integer pairs. One number each pair indicates an intensity value, and second number specifies the number of adjacent pixels on the scan line that are to have that intensity value.

Merits. Refreshing is not required. Produce a very steady image free of Flicker. Less bulky than a CRT. Demerits. Poor resolution of up to 60 d.p.i. It requires complex addressing and wiring. It is costlier than CRT.

Some system has multiple bits per pixel, the frame buffer is often referred to as pix map.

Some system has only one bit per pixel; the frame buffer is often referred to as bitmap.

Four input devices are keyboard, mouse, image scanners, and trackball.

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