Computer Graphics MCQs with Answers
Practice important Computer Graphics MCQs with answers and explanations.
Chapter: 39
Q1301:
In OpenGL, what would happen if you used `glLineStrip` instead of `glLineLoop` for drawing a closed polygon?
A. The first and last vertices might not connect properly
B. Both vertices would be connected correctly
C. The rendering time would decrease
D. The rendering quality would increase
Correct Answer:
A
Chapter: 39
Q1302:
When subdividing an icosahedron to approximate a sphere, the new vertices should be _______ after being normalized.
A. On the surface of the sphere
B. Outside the sphere
C. Inside the sphere
D. Unchanged
Correct Answer:
A
Chapter: 39
Q1303:
Which of the following is used to calculate the normalized cross product of two vectors in OpenGL?
A. `normcrossprod()`
B. `glNormal3fv()`
C. `glVertex3fv()`
D. `glBegin(GL_TRIANGLES)`
Correct Answer:
A
Chapter: 39
Q1304:
In the code for drawing an icosahedron, what does `vdata[tindices[i][0]]` represent?
A. The vertex data for a triangle
B. The index of a triangle's vertex
C. Normal vector for a surface
D. The color for a surface
Correct Answer:
A
Chapter: 39
Q1305:
What happens when you avoid T-intersections in polygonal modeling?
A. It prevents cracks from appearing in the surface
B. It makes the surface render faster
C. It improves lighting effects
D. It reduces memory usage
Correct Answer:
A
Chapter: 39
Q1306:
When subdividing a surface, smaller polygons are used in regions of _______.
A. High curvature
B. Flat regions
C. Low texture resolution
D. Low lighting intensity
Correct Answer:
A
Chapter: 39
Q1307:
For high-quality 3D models, which area of the surface should be subdivided more?
A. The silhouette edges
B. The interior edges
C. The back face
D. The bottom face
Correct Answer:
A
Chapter: 39
Q1308:
To calculate the normal vector of a triangular surface, what is the first step?
A. Find the cross product of two vectors on the surface
B. Calculate the angle between the vectors
C. Find the centroid of the triangle
D. Normalize the surface
Correct Answer:
B
Chapter: 39
Q1309:
In the example code, `glBegin(GL_TRIANGLES)` is used to _______.
A. Draw the vertices for a triangle
B. Render a circle
C. Define the color of a vertex
D. Initialize the OpenGL pipeline
Correct Answer:
A
Chapter: 39
Q1310:
Which method would you use to increase the accuracy of a polygonal approximation to a sphere?
A. Subdivide the triangles multiple times
B. Increase the number of polygons
C. Increase the resolution of textures
D. Use a higher precision color model
Correct Answer:
A
Chapter: 39
Q1311:
In the icosahedron example, what does the array `tindices[][]` represent?
A. The triangles formed by the vertices
B. The colors of the faces
C. The lighting values for the model
D. The texture coordinates for the model
Correct Answer:
A
Chapter: 39
Q1312:
What is the key reason to avoid cracks in polygonal surfaces?
A. To ensure the surface is rendered correctly
B. To reduce the computational load
C. To make the lighting effects work correctly
D. To simplify the texture mapping
Correct Answer:
A
Chapter: 39
Q1313:
The icosahedron is used as a rough approximation of a _______.
A. Circle
B. Sphere
C. Cube
D. Pyramid
Correct Answer:
B
Chapter: 39
Q1314:
Subdividing polygons into smaller sections increases _______.
A. Rendering time
B. Surface quality
C. Lighting accuracy
D. Memory usage
Correct Answer:
A
Chapter: 39
Q1315:
In the code, `glVertex3fv(vdata[tindices[i][0]])` is used to _______.
A. Draw the first vertex of a triangle
B. Define the texture of the triangle
C. Set the normal vector for a triangle
D. Begin drawing the polygon
Correct Answer:
A
Chapter: 39
Q1316:
If an icosahedron is subdivided multiple times, it can approximate a _______.
A. Smooth sphere
B. Flat surface
C. Circular polygon
D. Hexagonal grid
Correct Answer:
A
Chapter: 39
Q1317:
The normal vectors for an icosahedron are _______. Perpendicular to the faces
A. Parallel to the faces
B. Unnecessary for lighting calculations
C. Equal to the vertices
Correct Answer:
A
Chapter: 40
Q1318:
A fractal is a geometric pattern that repeats itself at every ______.
A. smaller scale
B. larger scale
C. irregular scale
D. constant scale
Correct Answer:
A
Chapter: 40
Q1319:
Which of the following is true about a fractal?
A. It has a fixed dimension
B. It is self-similar
C. It can only be described by Euclidean geometry
D. Its dimensions are always integers
Correct Answer:
B
Chapter: 40
Q1320:
According to Mandelbrot, fractals are derived from the Latin word ______.
A. fractus
B. fractal
C. fragor
D. fracti
Correct Answer:
A