CS602 Final Term MCQs by Masters

Computer graphics (cs602)

Final term mcqs fall 2013 “Libriansmine”

Q1. Total Marks: 1

Consider the following problem from lighting: A point (P1) is at (0, 0, 0) with normal equal to 1/(2*sqrt(2))*(sqrt(2), 2, sqrt(2)). The light is located at (0, 1, 0). The viewer is located at (1, 1,

1. . The specular and diffuse coefficients for the light are both (1, 1, 1), with the ambient portion as (.2, .2, .2). Complete the reflection vector. [ ------------] r = [ 0 ] [1/sqrt(2)] Choose from the values below:

-1

1/sqrt(2)

Q2. Total Marks: 1

Dark lights are nothing more than lights in which one or more of the color values are_______________.

Unknown

Negative

Null Positive

Q3. Total Marks: 1

The Phong reflection model simplifies light-matter interactions essentially into 4 vectors and a number of constants. Which piece of the Phong model is responsible for giving spheres their bright white spots?

Specular

Diffuse Ambient Ambient and Diffuse pg 232

Q4. Total Marks: 1

We want our scene to look more realistic, we should use _________ lights.

Point

Parallel

Spot

Q5. Total Marks: 1

This is a simple example of line clipping: the display window is the canvas and also the default -- ------------------, thus all line segments inside the canvas are drawn.

Clipping Rectangle

Clipping Circle Clipping Polygon Clipping Angle

Q6. Total Marks: 1

One problem with Gouraud shading is that the ----------- intensities can never be greater than the intensities at the edges.

Triangles

Squares Rectangles Polygons

Q7. Total Marks: 1

There is more penetration of light in case of ___________ surfaces.

Conductor (like metals)

Nonconductor (like dielectrics)

Both conductor and nonconductor

Q8. Total Marks: 1

_________ lights should be avoided because they are not for real time environment.

Point Parallel

Spot

Q9. Total Marks: 1

The physical range of colours a device can display is called _____________________ of the device.

Sharpness

Gamut

Colouring Colouring with Sharpness

Q10. Total Marks: 1

A polygon is usually defined by a sequence of vertices and ------------------

Edges

Vertices Points Ending lines

Q11. Total Marks: 1

Which of the following affine transforms does NOT affect vectors?

Scale

Rotation Shear Translation

Q12. Total Marks: 1

Shading

Clamping Scaling