Computer Graphics MCQs with Answers
Practice important Computer Graphics MCQs with answers and explanations.
Chapter: 23
Q761:
Which of the following can be done to brighten a scene when using colored light in a 3D environment?
A. Increase color saturation
B. Increase contrast
C. Use texture preprocessing
D. Reduce the alpha channel brightness
Correct Answer:
C
Chapter: 23
Q762:
What happens when a colored light is used in a scene?
A. The scene becomes brighter
B. The scene becomes darker
C. The scene stays the same
D. The light becomes less intense
Correct Answer:
B
Chapter: 23
Q763:
In a 24-bit color image, how many bits are allocated for each color channel?
A. 5 bits for red, 6 bits for green, 5 bits for blue
B. 8 bits for red, 8 bits for green, 8 bits for blue
C. 5 bits for red, 5 bits for green, 5 bits for blue
D. 4 bits for each channel
Correct Answer:
B
Chapter: 23
Q764:
Which of the following defines the concept of "saturation" in color operations?
A. The amount of light intensity
B. The level of transparency
C. The strength or purity of the color
D. The angle of the light source
Correct Answer:
C
Chapter: 23
Q765:
In the color4 structure, how are the color values for red, green, and blue stored?
A. In a float array
B. c[4]
C. As a struct with individual r, g, b components
D. As a hexadecimal number
Correct Answer:
B
Chapter: 23
Q766:
What does the `Saturation` function in the color4 structure likely address?
A. Adjusting the color to a specific range
B. Converting the color to grayscale
C. Changing the color model
D. Adjusting the alpha value
Correct Answer:
A
Chapter: 23
Q767:
When using RGB color values, if a surface has no red component, how will a red light affect it?
A. The surface will glow red
B. There will be no red contribution
C. The surface will appear blue
D. The surface will appear green
Correct Answer:
B
Chapter: 23
Q768:
What is the purpose of capping color values during color operations?
A. To ensure colors stay within the valid range
B. To prevent distortion of the image
C. To make the color appear brighter
D. To adjust the gamma of the image
Correct Answer:
A
Chapter: 23
Q769:
When performing piecewise multiplication of colors, what is the expected result?
A. The final color will always be brighter
B. Colors may become darker or stay the same
C. Colors will become more vibrant
D. Colors will blend into each other
Correct Answer:
B
Chapter: 23
Q770:
What happens when a surface is illuminated by a light with a green component, but the surface has no green component?
A. The surface will reflect green light
B. The surface will not reflect green light
C. The surface will reflect red light
D. The surface will appear white
Correct Answer:
B
Chapter: 24
Q771:
What happens when color values exceed 1 in the pipeline?
A. Clamping to 1
B. Scaling down
C. Shifting color
D. No effect
Correct Answer:
A
Chapter: 24
Q772:
What happens if color values fall below 0 in the pipeline?
A. Clamping to 0
B. Scaling up
C. Shifting color
D. No effect
Correct Answer:
A
Chapter: 24
Q773:
Clamping of color values tends to lose ________ in a scene.
A. Fidelity
B. Intensity
C. Saturation
D. Contrast
Correct Answer:
A
Chapter: 24
Q774:
What is the main drawback of scaling color values?
A. Loss of contrast
B. Loss of fidelity
C. Loss of intensity
D. Loss of saturation
Correct Answer:
B
Chapter: 24
Q775:
What color component is used for blending in the RGBA structure?
A. Red
B. Green
C. Blue
D. Alpha
Correct Answer:
D
Chapter: 24
Q776:
What is the purpose of alpha blending?
A. Adjust color saturation
B. Control color transparency
C. Adjust brightness
D. Increase image resolution
Correct Answer:
B
Chapter: 24
Q777:
What does clipping color values help to maintain?
A. Brightness
B. Saturation
C. Intensity
D. Contrast
Correct Answer:
B
Chapter: 24
Q778:
Darklights are used to ________ in a scene.
A. Brighten areas
B. Dim bright areas
C. Add new colors
D. Filter out colors
Correct Answer:
B
Chapter: 24
Q779:
Negative color values are referred to as ________.
A. Darklights
B. Shadow lights
C. Ghost lights
D. Negative lights
Correct Answer:
A
Chapter: 24
Q780:
In the Alpha Blending equation, what does the source represent?
A. The original pixel
B. The new pixel being drawn
C. The background color
D. The overlay color
Correct Answer:
B