Computer Graphics MCQs with Answers
Practice important Computer Graphics MCQs with answers and explanations.
Chapter: 2
Q41:
What is the role of the focusing system in a CRT?
A. Brighten the image
B. Enlarge the screen
C. Converge electron beam
D. Accelerate electrons
Correct Answer:
C
Chapter: 2
Q42:
Magnetic lens focusing is preferred in:
A. Black and white TVs
B. Special purpose devices
C. Mobile screens
D. Standard monitors
Correct Answer:
B
Chapter: 2
Q43:
What does 'aspect ratio' in graphics refer to?
A. Monitor height to width
B. Screen resolution
C. Vertical to horizontal points ratio
D. Dot pitch
Correct Answer:
C
Chapter: 2
Q44:
Which phosphor property affects how long the image remains on screen?
A. Brightness
B. Contrast
C. Persistence
D. Saturation
Correct Answer:
C
Chapter: 2
Q45:
What is a pixel in raster graphics?
A. A frame
B. A dot matrix
C. The smallest addressable screen element
D. Line segment
Correct Answer:
C
Chapter: 2
Q46:
A frame buffer storing black and white image uses how many bits per pixel?
A. 8
B. 1
C. 4
D. 16
Correct Answer:
B
Chapter: 2
Q47:
What is the name of a frame buffer used for color images with multiple bits per pixel?
A. Bitmap
B. ColorMap
C. PixelMap
D. Pixmap
Correct Answer:
D
Chapter: 2
Q48:
In raster scan, what is the process of returning the beam to the left of the next line called?
A. Vertical retrace
B. Refresh
C. Horizontal retrace
D. Frame redraw
Correct Answer:
C
Chapter: 2
Q49:
In interlaced scanning, how are lines drawn?
A. In one top-down pass
B. From center outward
C. In two passes (odd and even)
D. Randomly
Correct Answer:
C
Chapter: 2
Q50:
Random-scan systems are also known as:
A. Bitmap displays
B. Frame-buffer displays
C. Vector displays
D. Raster displays
Correct Answer:
C
Chapter: 2
Q51:
What type of pictures are drawn by random-scan systems?
A. 3D models
B. Complex images
C. Line drawings
D. Pixel arrays
Correct Answer:
C
Chapter: 2
Q52:
Random-scan displays refresh at what rate typically?
A. 10-20 fps
B. 100-120 fps
C. 30-60 fps
D. 1-5 fps
Correct Answer:
C
Chapter: 2
Q53:
Which method allows faster image drawing for complex pictures?
A. Vector drawing
B. Raster scan
C. Stroke writing
D. Refresh file
Correct Answer:
B
Chapter: 2
Q54:
Raster scan system stores images in:
A. 3D matrices
B. Frame buffer
C. Control grid
D. Z-buffer
Correct Answer:
B
Chapter: 2
Q55:
Fill in the blank: ________ monitors use CRT technology to display images.
A. Plasma
B. LCD
C. LED
D. Video
Correct Answer:
D
Chapter: 2
Q56:
Fill in the blank: In beam penetration method, ________ layers of phosphor are used.
A. One
B. Two
C. Three
D. Four
Correct Answer:
B
Chapter: 2
Q57:
Which color method allows wide color range on CRT?
A. Beam penetration
B. RGB overlay
C. Shadow mask
D. Plasma coating
Correct Answer:
C
Chapter: 2
Q58:
Which three phosphor dots make up a triad in a shadow mask CRT?
A. RGB
B. RBY
C. GCB
D. GYR
Correct Answer:
A
Chapter: 2
Q59:
Beam penetration allows how many basic colors?
A. 2
B. 3
C. 4
D. 8
Correct Answer:
C
Chapter: 2
Q60:
What determines the resolution of a CRT display?
A. Beam size
B. Number of coils
C. Number of points per cm
D. Frame buffer depth
Correct Answer:
C