UpWork (oDesk) & Elance PC Graphics Test Question & Answers

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Ques : Which of the following is/are basic phases of creating 3-D computer graphics?
Ans  : 3-D modeling + 3-D rendering+Computer animation

Ques : Which of the following are common shading models?
Ans  :  flat + Gouraud +Phong

Ques : Which of the following statements about pixels are true? (Answer all that apply.)
Ans  : A pixel has a dimension + Pixels are visible +  A pixel can have coordinates.

Ques : Which of the following is/are typical steps in a graphical pipeline that converts three-dimensional objects for two-dimensional display or printing?
Ans  : Rasterization +Viewport mapping and clipping

Ques : Which of the following colors belong to the standard four-color subtractive color model used in color printing or otherwise used to describe the printing process?
Ans  : Magenta +  Yellow

Ques : Which of the following colors belong to the most common three-color additive color model used in video displays or otherwise used to describe the physical concepts involved?
Ans  : Red + Green

Ques : Which of the following file formats are popular vector-graphics formats?
Ans  :   EPS  + SVG

Ques : What is meant by the term projection?
Ans  : The process of mapping three dimensional images to two dimensions for display.

Ques : Which of the following raster graphics editors used to process digital graphics and photographs is/are open source, instead of being proprietary?
Ans  : GIMP

Ques :  Which one of the following graphics standard specifications is the main competitor to Microsoft's Direct3D (the 3D graphics API within DirectX)?
Ans  : OpenGL

Ques : What does the term "jaggies" imply?
Ans  : The stair-step effect seen along curves and edges in text or bit-mapped graphics.

Ques : What does the term "spline" imply?
Ans  : In computer-aided design, a smooth curve that runs through a series of given points.

Ques : A modeling technique based upon a formal grammar whereby complex shapes are recursively generated from relatively simpleprocedures is termed as:
Ans  : Graftal

Ques : he process of using an image described in a vector-graphics format and converting it into a bitmapped image as output on a display or printer, or as storage in a bitmapped file is known as
Ans  : Rasterization

Ques : Which one of the color parameters measures how far away the color is from gray?
Ans  : Hue

Ques : Which of the following techniques reduces the appearance of jagged edges of lines and edges in raster graphics?
Ans  : Anti-aliasing

Ques : The process whereby a specific key color (often blue or green) within an image is made transparent when that image is mixed with another image is known as
Ans  : Chroma keying

Ques : Which of the following graphic formats allow for animation?
Ans  : GIF

Ques : A process in 2-D computer graphics whereby a closed vector path is used to mask (block) parts of an image is known as:
Ans  : Clipping path

Ques : What is meant by the term crop?
Ans  : Trimming or masking of photos, graphics, drawings, or illustrations

Ques : Which of the following graphical formats is/are always low-resolution (8-bit) bitmap graphics?
Ans  : GIF

Ques : The vector-graphics package that was developed by Microsoft is:
Ans  : Visio

Ques : _________ adds appropriately colored pixels to an image to make it seem as though more colors were present in the original.
Ans  :Over print

Ques : What does the term "stroke weight" denote?
Ans  :  A term that illustration software uses to specify the thickness of a line when drawing a path.

Ques : The effect that occurs when an object nearer to the viewport in 3-D space blocks (masks) another, more distant object from view is called:
Ans  : Depth

Ques : What is meant by the term rigging?
Ans  : The process of linking a 3-D object, such as modeling a character, to its bone structure (skeletal animation).

Ques : A technique for achieving higher quality in lower-quality images is called __________. It takes advantage of an optical illusion to simulate 24-bit quality with 8-bit or 16-bit images:
Ans  : Dithering

Ques : Which one of the following is a data structure used to organize objects within a space, which can be used in hidden-surface removal and in ray tracing?
Ans  : Binary space partitioning (BSP) tree

Ques :  What does the term "constraint" imply?
Ans  : A rule or condition that must be followed regarding how the individual objects within an graphic can or cannot move, such as a wrist having to be attached to both a hand and an end of the lower arm.

Ques : What is meant by the term fog?
Ans  : The mixing of an image with a fixed color that thickens as the image's pixels get further away from the viewpoint.

Ques : The first procedure in the OpenGL pipeline is to transform a 3-D point that is defined in the object coordinate system into the world coordinate system. This step has three possible transformations: rotation, scaling, and translation. Which one of those below is typically the  correct order for executing these three transformations?
Ans  :   First rotation, then translation, and then scaling.

Ques : In computer animation, the entire frame is redrawn for each frame. What of the following would reduce flicker between frames?
Ans  : Double buffering

Ques : Bitmapped graphics are also known as:
Ans  : Raster graphics

Ques :  Select from the following choices the one that most closely completes the Shannon sampling theorem: "The ideal samples of a continuous function contain all the information in the original function if and only if the continuous function is sampled at a frequency ________________ the highest frequency in the function."
Ans  :  Equal to

Ques : In computer graphics, when a line or object is moved where one end or point stays fixed in position is termed as:
Ans  : Rubber banding

Ques :  Which of the following best describes the term "vertex-vertex polygon mesh?"
Ans  : The simplest mathematical representation of a mesh, but which is not widely used due to the lack of explicit face and edge information.

Ques : Which of the following polygon meshes is most commonly used in mesh modelling because its input data are more readily acceptable to modern hardware?
Ans  : Vertex-face mesh

Ques : Which of the following rotation techniques gives the best results?
Ans  : Quaternions

Ques : What is meant by the term gradient?
Ans  :  A color (or grayscale) fill that gradually blends from one color to another, perhaps from light to dark, for example.

Ques : The serial execution of the processes applied to geometric primitives (text, lines, polygons, curves, and surfaces) in a graphics package to produce two-dimensional output is called its
Ans  :  Rendering pipeline

Ques : Another term for the video output device for storing the graphic image as it is being formed and later used for displaying the image is:
Ans  : Frame buffer

Ques : An image rendering process that builds images based upon the propagation of light rays and the effects of absorption, reflection, and refraction associated with the objects being scanned is termed as:
Ans  : Ray tracing

Ques : Images based upon geometric elements, such as points, curves, and surfaces, that follow mathematical equations are called:
Ans  : Vectors

Ques : What does the term "depth sort" imply?
Ans  : An algorithm for creating a hidden-line drawing of polygon data sets by drawing the polygons from the most distant to the closest, in order.

Ques : What does the term "bezier" imply?
Ans  : The term that describes one way that illustration software may create curves and shapes by using control points and control handles.

Ques :In computer graphics, a technique in which irregularities in shading are created for simulating rough textures is called:
Ans  :Bump mapping

Ques : When considering illumination from light sources, which of the following types of light sources has the same intensity in all directions:
Ans  :  Point source

Ques : Which of the following is the most commonly used lighting model?
Ans  : Phong

Ques : What does the term "flythrough" imply?
Ans  :  A type of animation in which the camera moves around a scene, rather than objects moving in front of a stationary camera.

Ques : The number of bits per pixel typically used for the color depth to be described as being a truecolor format is:
Ans  : 24

Ques : In a 3-D graphics environment, the process of subdividing a surface into a mesh of smaller shapes that are easy to analyze is known as:
Ans  : Tessellation

Ques : Which of the following types of reflection transmits light in all direction with the same energy?
Ans  : Diffuse

Ques : Which of the following vector graphics editors used to process digital graphics is/are open source, instead of being proprietary?
Ans  : Inkscape

Ques : The rendering of three-dimensional computer graphics often employs one or more  approaches to model a complex four-dimensional mathematical function that defines the  physical behavior of light at an opaque surface. This fundamental radiometric concept is known as the:
Ans  :  Bidirectional reflectance distribution function (BRDF)

Ques : What is meant by the term auto trace?
Ans  : A programmed function in illustration software that converts raster graphics into vector graphics whereby paths are created along the edges of a scanned image.

Ques : Which one of the following formats would provide the least amount of pixelation when its dimensions are scaled (magnified) in size?
Ans  : JPEG

Ques :  What is meant by the term stroke?
Ans  : A term that illustration software uses to describe the width of a line in a path.

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