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Basic PC Graphics MCQ

1.

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

 

Answer

Correct Answer: Vertex-face mesh

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2.

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

Answer

Correct Answer: Rubber banding

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3.

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:

Answer

Correct Answer: Occlusion

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4.

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:

Answer

Correct Answer: Ray tracing

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5.

What is meant by the term projection?

Answer

Correct Answer: The process of mapping three dimensional images to two dimensions for display.

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6.

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

Answer

Correct Answer: EPS

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7.

Which of the following types of reflection transmits light in all direction with the same energy?

Answer

Correct Answer: Diffuse

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8.

Of the following, select all of the techniques that could be employed in anti-aliasing:

Answer

Correct Answer: Sinc-function filtering

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9.

Which of the following are common shading models?

Answer

Correct Answer: flat

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10.

Which of the following rotation techniques gives the best results?

Answer

Correct Answer: Quaternions

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11.

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

Answer

Correct Answer: Graftal

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12.

What does the term "depth sort" imply?

Answer

Correct Answer: 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.

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13.

What does the term "flythrough" imply?

Answer

Correct Answer: A type of animation in which the camera moves around a scene, rather than objects moving in front of a stationary camera.

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14.

Which of the following is/are basic phases of creating 3-D computer graphics?

Answer

Correct Answer: 3-D modeling

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15.

Which of the following is the most commonly used lighting model?

Answer

Correct Answer: Phong

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16.

What does the term "spline" imply?

Answer

Correct Answer: In computer-aided design, a smooth curve that runs through a series of given points.

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17.

Which of the following statements about pixels are true? (Answer all that apply.)

Answer

Correct Answer: A pixel is a point.

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18.

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:

Answer

Correct Answer: Bidirectional reflectance distribution function (BRDF)

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19.

Bitmapped graphics are also known as:

Answer

Correct Answer: Raster graphics

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20.

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:

Answer

Correct Answer: Tessellation

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21.

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

Answer

Correct Answer: Vectors

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22.

What is meant by the term auto trace?

Answer

Correct Answer: A programmed function in illustration software that converts raster graphics into vector graphics whereby paths are created along the edges of a scanned image.

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23.

Which of the following file formats are popular vector-graphics formats?

Answer

Correct Answer: EPS

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24.

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?

Answer

Correct Answer: Red

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25.

What does the term "jaggies" imply?

Answer

Correct Answer: The stair-step effect seen along curves and edges in text or bit-mapped graphics.

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26.

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

Answer

Correct Answer: Double buffering

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27.

Which one of the color parameters measures how far away the color is from gray?

Answer

Correct Answer: Saturation

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28.

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

Answer

Correct Answer: Clipping path

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29.

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

Answer

Correct Answer: Dithering

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30.

What is meant by the term gradient?

Answer

Correct Answer: A color (or grayscale) fill that gradually blends from one color to another, perhaps from light to dark, for example.

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31.

Which of the following best describes the term "vertex-vertex polygon mesh?"

Answer

Correct Answer: The simplest mathematical representation of a mesh, but which is not widely used due to the lack of explicit face and edge information.

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32.

What is meant by the term stroke?

Answer

Correct Answer: A term that illustration software uses to describe the width of a line in a path.

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33.

Which of the following graphic formats allow for animation?

Answer

Correct Answer: GIF

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34.

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

Answer

Correct Answer: OpenGL

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35.

What is meant by the term rigging?

Answer

Correct Answer: The process of linking a 3-D object, such as modeling a character, to its bone structure (skeletal animation).
The process of linking a 3-D object, such as modeling a character, to its bone structure (skeletal animation).

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36.

What is meant by the term fog?

Answer

Correct Answer: The mixing of an image with a fixed color that thickens as the image's pixels get further away from the viewpoint.

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37.

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

Answer

Correct Answer: 24

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38.

What does the term "stroke weight" denote?

Answer

Correct Answer: A term that illustration software uses to specify the thickness of a line when drawing a path.

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39.

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

Answer

Correct Answer: GIMP

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40.

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

Answer

Correct Answer: Visio

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41.

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

Answer

Correct Answer: Inkscape

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42.

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:

Answer

Correct Answer: Chroma keying

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43.

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?

Answer

Correct Answer: Binary space partitioning (BSP) tree

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44.

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

Answer

Correct Answer: Point source

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45.

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:

Answer

Correct Answer: Dithering

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46.

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?

Answer

Correct Answer: Magenta

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47.

What does the term "constraint" imply?

Answer

Correct Answer: . 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.

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48.

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?

Answer

Correct Answer: First translation, then scaling, and then rotation.

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49.

Which of the following techniques reduces the appearance of jagged edges of lines and edges in raster graphics?

Answer

Correct Answer: Anti-aliasing

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50.

Which of the following is/are typical steps in a graphical pipeline that converts three-dimensional objects for two-dimensional display or printing?

Answer

Correct Answer: Viewport mapping and clipping

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51.

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

Answer

Correct Answer: Bump mapping

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52.

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

Answer

Correct Answer: GIF

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53.

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:

Answer

Correct Answer: Frame buffer

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54.

The 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

Answer

Correct Answer: Rasterization

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55.

What is meant by the term crop?

Answer

Correct Answer: Trimming or masking of photos, graphics, drawings, or illustrations.

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56.

What does the term "bezier" imply?

Answer

Correct Answer: The term that describes one way that illustration software may create curves and shapes by using control points and control handles.

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57.

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:

Answer

Correct Answer: Rendering pipeline

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58.

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."

Answer

Correct Answer: Greater than twice

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