Graphics Monitors in Computer Graphics MCQ Questions and Answers
1. The term “graphics monitor” refers to a device used to
A) Capture visual data
B) Store image data
C) Display graphical images and text
D) Process visual signals
Answer: C
2. The earliest computer graphics monitors were based on
A) LCD technology
B) LED panels
C) Cathode Ray Tube (CRT)
D) OLED panels
Answer: C
3. The working principle of a CRT monitor is based on
A) Light reflection
B) Liquid crystal alignment
C) Electron beam excitation of phosphor
D) LED illumination
Answer: C
4. The electron gun in a CRT is used to
A) Reflect light
B) Display colors
C) Generate and direct electron beams
D) Cool the monitor
Answer: C
5. In a CRT monitor, deflection of the electron beam is achieved by
A) Gravitational fields
B) Acoustic waves
C) Magnetic or electrostatic fields
D) Light rays
Answer: C
6. The glow on a CRT screen occurs when
A) Beam hits glass surface
B) Beam strikes the phosphor coating
C) Screen voltage drops
D) Screen refresh completes
Answer: B
7. The intensity of light emitted from a CRT screen depends on
A) Beam speed
B) Screen size
C) Beam current (intensity)
D) Refresh period
Answer: C
8. The persistence of a CRT monitor refers to
A) Brightness of pixels
B) Time taken for phosphor glow to decay after excitation
C) Scan frequency
D) Beam intensity
Answer: B
9. The electron beam in a CRT is focused using
A) Lenses
B) Optical mirrors
C) Electrostatic focusing system
D) Light filters
Answer: C
10. Raster-scan CRT displays create an image by
A) Drawing lines directly
B) Scanning line-by-line from top to bottom
C) Reflecting pixels
D) Rotating beam axes
Answer: B
11. Random-scan CRT displays are also called
A) Pixel displays
B) Vector displays
C) LED displays
D) Liquid crystal displays
Answer: B
12. The color CRT monitor has how many electron guns?
A) One
B) Three (Red, Green, Blue)
C) Two
D) Four
Answer: B
13. The shadow mask in a color CRT is used to
A) Filter out excess brightness
B) Ensure electron beams strike correct color phosphor dots
C) Control beam speed
D) Focus the screen
Answer: B
14. The refresh rate of a CRT monitor is measured in
A) Pixels per second
B) Hertz (frames per second)
C) Milliseconds per frame
D) Volts per second
Answer: B
15. Flicker in a CRT monitor is caused by
A) High persistence
B) Small resolution
C) Low refresh rate
D) Excess beam intensity
Answer: C
16. The main component that determines the resolution of a monitor is
A) Screen curvature
B) Refresh rate
C) Dot pitch and pixel density
D) Power supply
Answer: C
17. The dot pitch of a monitor defines
A) Number of dots per inch
B) Refresh speed
C) Distance between two phosphor dots of the same color
D) Beam voltage
Answer: C
18. The lower the dot pitch, the
A) Lower the resolution
B) Higher the image sharpness
C) More flicker appears
D) Lower brightness
Answer: B
19. The beam blanking interval occurs when
A) Image is displayed
B) Beam returns to the start of a new line or frame
C) Color depth changes
D) Brightness is adjusted
Answer: B
20. The control grid in a CRT is responsible for
A) Beam deflection
B) Regulating beam intensity
C) Controlling beam focus
D) Synchronizing retrace
Answer: B
21. The typical persistence value for high-quality animation CRTs is
A) 100 ms
B) 1–2 ms
C) 50 ms
D) 20 ms
Answer: B
22. A display refresh rate of 60 Hz means
A) 60 lines per second
B) Screen is redrawn 60 times per second
C) 60 colors are displayed
D) 60 beams are generated
Answer: B
23. The two main types of scanning in CRT monitors are
A) Horizontal and parallel
B) Horizontal and vertical scanning
C) Vector and linear scanning
D) Beam and phosphor scanning
Answer: B
24. Interlaced scanning reduces
A) Resolution
B) Flicker without increasing bandwidth
C) Beam energy
D) Color intensity
Answer: B
25. The term “aspect ratio” of a monitor refers to
A) Number of colors
B) Number of pixels per inch
C) Ratio of screen width to height
D) Ratio of brightness to contrast
Answer: C
26. A typical aspect ratio for modern monitors is
A) 4:3
B) 3:2
C) 16:9
D) 5:4
Answer: C
27. A CRT monitor that displays 1024×768 resolution at 75 Hz has approximately
A) 70,000 pixels
B) 768,000 pixels
C) 786,432 pixels
D) 1,000,000 pixels
Answer: C
28. The phosphor material in a CRT converts
A) Sound to light
B) Heat to light
C) Electron energy to visible light
D) Light to electrons
Answer: C
29. The color reproduction in a monitor is achieved using
A) Polarization
B) Additive color mixing (RGB model)
C) Subtractive mixing
D) Light reflection
Answer: B
30. The major disadvantage of CRT monitors is
A) Low power usage
B) Low weight
C) High power consumption and bulky size
D) High refresh rates
Answer: C
31. Flat-panel displays replaced CRTs because they
A) Are thinner, lighter, and consume less power
B) Produce more radiation
C) Have less color depth
D) Need high voltage
Answer: A
32. LCD stands for
A) Liquid Crystal Display
B) Linear Cathode Display
C) Light Control Device
D) Low Current Display
Answer: A
33. LCDs operate on the principle of
A) Emission of electrons
B) Light modulation through liquid crystals
C) Magnetic field generation
D) Thermal excitation
Answer: B
34. The backlight in an LCD monitor is provided by
A) Plasma
B) LED or CCFL lamps
C) OLED matrix
D) CRT beam
Answer: B
35. TFT in LCD monitors stands for
A) Thin Film Transistor
B) Thin Fluorescent Tube
C) Transistor Feedback Technology
D) Thin Frame Transducer
Answer: A
36. TFT-LCDs are better than passive matrix LCDs because they
A) Are cheaper
B) Have more persistence
C) Provide faster response and better contrast
D) Use less transistors
Answer: C
37. LED monitors are technically
A) CRT-based
B) LCD panels with LED backlighting
C) Plasma-based
D) OLED displays
Answer: B
38. OLED stands for
A) Organic Light Emitting Diode
B) Optical Liquid Emission Display
C) Organic Linear Electro Display
D) Optical Light Enhancer Display
Answer: A
39. OLED monitors differ from LCDs because
A) They use cold cathode tubes
B) They emit their own light, no backlight needed
C) They require CRT guns
D) They use liquid crystals
Answer: B
40. The main advantage of OLED monitors is
A) High contrast ratio and flexible panels
B) High voltage usage
C) Heavy build
D) Long warm-up time
Answer: A
41. OLED displays degrade over time due to
A) Dust
B) Heat sinks
C) Organic material aging
D) Electrical noise
Answer: C
42. The plasma display panel (PDP) works on
A) Liquid crystal refraction
B) Ionized gas discharges producing light
C) Electron reflection
D) Sound vibration
Answer: B
43. Each pixel in a plasma display contains
A) LEDs
B) Tiny cells filled with inert gases
C) Phosphor beads only
D) Micro-lenses
Answer: B
44. The major drawback of plasma displays is
A) Low contrast
B) High power consumption and image burn-in
C) Poor brightness
D) Limited size
Answer: B
45. The monitor component that converts digital RGB signals to analog is
A) DAC (Digital-to-Analog Converter)
B) ADC
C) Amplifier
D) Transformer
Answer: A
46. The monitor’s brightness is measured in
A) Lux
B) Candela
C) Nits (cd/m²)
D) Lumens
Answer: C
47. The refresh rate and frame rate are identical when
A) Each frame is displayed exactly once per refresh
B) Each frame repeats twice
C) Display is interlaced
D) Phosphor persistence is long
Answer: A
48. The response time of a display is
A) Time taken for a pixel to change from one color to another
B) Time for one frame refresh
C) Time between two retraces
D) Time to adjust brightness
Answer: A
49. Faster response time means
A) Less motion blur in fast-moving images
B) More flicker
C) Higher persistence
D) Lower refresh
Answer: A
50. The contrast ratio of a monitor is
A) Ratio of refresh rate to frame rate
B) Ratio of luminance of brightest white to darkest black
C) Ratio of pixels to inches
D) Ratio of power to brightness
Answer: B
51. The resolution of a monitor defines
A) Color depth
B) Number of distinct pixels horizontally and vertically
C) Refresh speed
D) Screen ratio
Answer: B
52. The pixel density of a display is measured in
A) Pixels per foot
B) Pixels per inch (PPI)
C) Frames per second
D) Megapixels
Answer: B
53. LCD monitors consume less power because
A) They use CRT beams
B) They block or pass light instead of generating it
C) They heat the phosphor
D) They use gas discharge
Answer: B
54. The viewing angle of a monitor refers to
A) Maximum angle from center at which image remains visible without distortion
B) Pixel density variation
C) Beam deflection angle
D) Panel curvature
Answer: A
55. Monitors that support stereoscopic viewing are called
A) Multiscan monitors
B) 3D monitors
C) Holographic CRTs
D) Virtual panels
Answer: B
56. A monitor with a resolution of 3840×2160 is also known as
A) HD
B) Full HD
C) 4K Ultra HD
D) 8K UHD
Answer: C
57. The refresh rate required to prevent visible flicker is generally
A) 25 Hz
B) 30 Hz
C) 60 Hz or higher
D) 10 Hz
Answer: C
58. Increasing refresh rate beyond 75 Hz results in
A) Reduced flicker and smoother motion
B) Increased brightness
C) Decreased resolution
D) Higher persistence
Answer: A
59. The gamma correction in monitors adjusts
A) Nonlinear brightness response
B) Frame buffer timing
C) Resolution scaling
D) Color saturation
Answer: A
60. The curvature in modern monitors is used to
A) Reduce resolution
B) Increase persistence
C) Improve field of view and reduce distortion
D) Save power
Answer: C
61. Monitors with adjustable stands and screen rotation are known as
A) Ergonomic monitors
B) Interactive monitors
C) Plasma monitors
D) Reflective displays
Answer: A
62. The refresh rate of LCDs depends primarily on
A) Beam scanning
B) Response time of liquid crystals
C) Deflection coils
D) Voltage gain
Answer: B
63. The factor determining LCD image stability is
A) Phosphor composition
B) Alignment of liquid crystals
C) Electron beam focus
D) Light wavelength
Answer: B
64. Over time, LED monitors may show
A) Beam distortion
B) Magnetic drift
C) Dimming of backlight LEDs
D) Phosphor decay
Answer: C
65. In a graphics workstation, multiple monitors connected form a
A) Multi-display or extended display setup
B) Single raster buffer
C) Vector generator
D) Persistence field
Answer: A
66. The color gamut of a monitor refers to
A) Range of colors the display can produce
B) Refresh synchronization
C) Phosphor brightness
D) Frame memory
Answer: A
67. The technology used in most modern curved and large gaming monitors is
A) Plasma
B) LED or OLED
C) CRT
D) LCD only
Answer: B
68. The primary difference between LCD and LED monitors is
A) The backlighting source
B) The color model
C) The resolution
D) The aspect ratio
Answer: A
69. IPS panels are known for
A) Low brightness
B) Low color accuracy
C) Wide viewing angles and good color reproduction
D) Faster response time
Answer: C
70. TN (Twisted Nematic) LCDs are popular because they
A) Have faster response times and are cost-effective
B) Offer best viewing angles
C) Have highest contrast
D) Use OLED backlight
Answer: A
71. The display technology used in VR headsets is usually
A) OLED or AMOLED panels
B) CRT
C) Plasma
D) LED only
Answer: A
72. The typical brightness for modern monitors is around
A) 50 cd/m²
B) 100 cd/m²
C) 250–400 cd/m²
D) 1000 cd/m²
Answer: C
73. The monitor refresh rate and GPU frame rate should
A) Be synchronized to avoid screen tearing
B) Always differ greatly
C) Be random
D) Be independent
Answer: A
74. The HDR (High Dynamic Range) monitors improve
A) Brightness and color contrast range
B) Frame rate
C) Screen curvature
D) Pixel density
Answer: A
75. G-Sync and FreeSync technologies are used to
A) Synchronize monitor refresh with GPU frame output
B) Adjust pixel density
C) Change color model
D) Modify gamma curves
Answer: A
76. Monitors supporting 10-bit color depth can display
A) 1 million colors
B) Over 1 billion colors
C) 16 million colors
D) 256 colors
Answer: B
77. The component that drives monitor display timings is
A) Video controller
B) CPU
C) GPU cache
D) Power supply
Answer: A
78. In modern monitors, HDMI and DisplayPort are used for
A) Power supply
B) Digital video and audio transmission
C) Calibration
D) Network control
Answer: B
79. The refresh buffer in a monitor stores
A) Current frame’s pixel data to be displayed
B) Control commands
C) User input
D) Calibration data
Answer: A
80. Flicker-free monitors use
A) Constant current LED backlighting
B) Interlaced scanning
C) High persistence phosphor
D) Analog modulation
Answer: A
81. The curved monitors improve
A) Viewing comfort and reduce edge distortion
B) Power consumption
C) Refresh delay
D) Pixel density
Answer: A
82. The energy label “Energy Star” in monitors indicates
A) Power-efficient design**
B) Refresh rate certification
C) Display resolution
D) HDR support
Answer: A
83. Modern gaming monitors feature refresh rates up to
A) 60 Hz
B) 75 Hz
C) 240 Hz or higher
D) 120 Hz maximum
Answer: C
84. OLED burn-in occurs when
A) Power exceeds limit
B) Same static image remains too long
C) High refresh rate used
D) Brightness lowered
Answer: B
85. The phosphor screen in CRTs is coated with which materials?
A) Aluminum
B) Liquid crystals
C) Phosphorescent compounds of ZnS and rare-earth elements
D) LED beads
Answer: C
86. The vacuum tube in CRT is necessary to
A) Maintain brightness
B) Allow free electron movement without collision with air molecules
C) Cool the screen
D) Reflect the beam
Answer: B
87. In a color CRT, the beam convergence ensures
A) Three beams hit the same point on screen for accurate color mixing
B) Proper vertical deflection
C) Brightness consistency
D) Pixel blending
Answer: A
88. LCDs display color using
A) Additive phosphors
B) RGB color filters with sub-pixels
C) Gas discharge cells
D) LED reflection
Answer: B
89. QLED monitors differ from standard LED in that they
A) Use OLED pixels
B) Add quantum-dot layer for color enhancement
C) Use CRT scanning
D) Have no backlight
Answer: B
90. The refresh cycle of a display includes
A) Scanning and retrace periods
B) Phosphor replacement
C) Backlight flashing
D) Image compression
Answer: A
91. The typical lifetime of modern LED monitors is about
A) 1,000 hours
B) 5,000 hours
C) 30,000–60,000 hours
D) 100,000 hours
Answer: C
92. LCD screens cannot produce deep blacks because
A) Poor resolution
B) Backlight always leaks some light
C) Slow refresh
D) Thin crystals
Answer: B
93. The device that stores per-pixel color intensity before sending to display is
A) Frame buffer
B) Cache memory
C) ROM
D) Pixel decoder
Answer: A
94. The GPU sends data to monitor via
A) Display controller and video cable
B) CPU bus directly
C) Audio controller
D) Memory bus
Answer: A
95. LCD monitors use polarizers to
A) Control light orientation and brightness
B) Focus electron beams
C) Block electromagnetic waves
D) Generate color
Answer: A
96. The refresh synchronization signal between CPU and monitor is called
A) Vertical sync (VSync)
B) Color sync
C) Frame control
D) Beam lock
Answer: A
97. The display’s color accuracy can be calibrated using
A) Colorimeter device
B) Voltmeter
C) Brightness knob
D) Frequency tester
Answer: A
98. The energy consumption of monitors depends mostly on
A) CPU speed
B) Screen size, brightness, and backlight type
C) Color model
D) RAM size
Answer: B
99. Monitors with touch-sensitive screens integrate
A) Joystick interface
B) Touch sensors or capacitive overlays
C) Magnetic field sensors
D) LED grids only
Answer: B
100. The next-generation flexible display technology is based on
A) CRT
B) LCD
C) OLED and e-ink materials
D) Plasma
Answer: C