set-1

1. Expansion of CRT is:

1. Cathode Ray Tube

2. Common Reflection Tube

3. Computer Related Tube

4. Common Reflection Tube

Show me the answer

Answer: 1. Cathode Ray Tube.

Explanation:

• CRT stands for Cathode Ray Tube, which is a technology used in older television and computer monitors.

2. The Operations of Most ______ Are Based on the Standard Cathode Ray Tubes.

1. Scanner

2. Printers

3. Video monitors

4. Card readers

Show me the answer

Answer: 3. Video monitors.

Explanation:

• Video monitors traditionally used CRT technology to display images.

3. A Beam of Electrons Emitted by an Electron Gun is Also Called as ______.

1. Electric rays

2. Cathode rays

3. Magnetic rays

4. Infra-red rays

Show me the answer

Answer: 2. Cathode rays.

Explanation:

• A beam of electrons emitted by an electron gun is called cathode rays, which are used in CRTs to create images.

4. Expansion of DDA is ______.

1. Device Display Analyzer

2. Digital Device Analyzer

3. Digital Differential Analyzer

4. Digital Display Analyzer

Show me the answer

Answer: 3. Digital Differential Analyzer.

Explanation:

• DDA stands for Digital Differential Analyzer, an algorithm used for rasterization of lines, triangles, and polygons.

5. Random Scan Displays Are Designed to Draw All Component Lines at of a Picture ______ Times Each Second.

1. 20 to 40

2. 30 to 60

3. 40 to 70

4. 20 to 50

Show me the answer

Answer: 2. 30 to 60.

Explanation:

• Random scan displays refresh the screen 30 to 60 times per second to maintain a stable image.

6. In Beam Penetration Method, ______ Layers of Phosphor Are Usually Used.

1. 1

2. 2

3. 3

4. 4

Show me the answer

Answer: 2. 2.

Explanation:

• The beam penetration method uses two layers of phosphor (red and green) to produce colors.

7. In Beam Penetration Method, ______ and ______ Layers of Phosphor Are Usually Used.

1. Red and green

2. Yellow and green

3. Blue and green

4. Orange and green

Show me the answer

Answer: 1. Red and green.

Explanation:

• The beam penetration method uses red and green phosphor layers to create color variations.

8. VDU is a ______ Device.

1. Processing

2. Input

3. Peripheral

4. Hardware

Show me the answer

Answer: 3. Peripheral.

Explanation:

• VDU (Visual Display Unit) is a peripheral device used to display output from a computer.

9. The Operation of the Most Video Monitors is Based on the ______ CRT.

1. Static

2. Dynamic

3. Standard

4. Pervasive

Show me the answer

Answer: 3. Standard.

Explanation:

• Most video monitors are based on the standard CRT technology.

10. In Cathode Ray Tube, a Beam of Electrons is Emitted ______.

1. From the base

2. By an electron gun

3. By a focusing system

4. By deflection plates

Show me the answer

Answer: 2. By an electron gun.

Explanation:

• In a CRT, the electron gun emits a beam of electrons that strikes the phosphor-coated screen to produce images.

11. The Negatively Charged Electrons Inside the CRT Are Then Accelerated Towards the ______.

1. Phosphor coating

2. Base

3. Electron gun

4. Electron beam object

Show me the answer

Answer: 1. Phosphor coating.

Explanation:

• The electrons are accelerated towards the phosphor coating on the screen, which emits light when struck by the electrons.

12. The Magnetic Field Produced by Each Pair of Coils Results in ______ Deflection Force.

1. Transverse

2. Magnetic

3. Slopping

4. Repulsive

Show me the answer

Answer: 1. Transverse.

Explanation:

• The magnetic field produced by the deflection coils results in a transverse force that moves the electron beam.

13. A Major Difference Between Phosphors is Their ______.

1. Permanent state

2. Feebleness

3. Persistence

4. Magnetic deflection

Show me the answer

Answer: 3. Persistence.

Explanation:

• Phosphors differ in their persistence, which is the duration they continue to emit light after being excited by the electron beam.

14. The Diagonal Screen Dimension of a Personal Computer System is Given as the Sizes Varying from About ______ Inches or More.

1. 12 to 21

2. 27 to 12

3. 0 to 27

4. 4 to 12

Show me the answer

Answer: 1. 12 to 21.

Explanation:

• The diagonal screen size of personal computer monitors typically ranges from 12 to 21 inches or more.

15. Picture Definition is Stored in ______ Buffer Area in Memory.

1. Frame

2. Outer

3. Refresh

4. Restore

Show me the answer

Answer: 1. Frame.

Explanation:

• The picture definition is stored in the frame buffer, which is a portion of memory dedicated to holding the image data.

16. The Rate at Which the Picture is Redrawn on the Screen is Called ______ Rate.

1. Buffer

2. Refresh

3. Draw

4. Delete

Show me the answer

Answer: 2. Refresh.

Explanation:

• The refresh rate is the frequency at which the image on the screen is redrawn, typically measured in Hertz (Hz).

17. A System with 24 Bits Per Pixel & a Screen Resolution of 1024 by 1024 Requires ______ Mega Byte of Storage for Frame Buffer.

1. 3

2. 4

3. 5

4. 6

Show me the answer

Answer: 1. 3.

Explanation:

• Calculation:

  $$\text{Frame buffer size} = \frac{1024 \times 1024 \times 24}{8 \times 1024 \times 1024} = 3 \text{ MB}.$$

18. In a Black and White System ______ Per Pixel is Needed to Control the Intensity of Screen Positions.

1. 0 bit

2. 1 bit

3. 2 bits

4. 3 bits

Show me the answer

Answer: 2. 1 bit.

Explanation:

• In a black and white system, 1 bit per pixel is sufficient to represent on/off states (black or white).

19. In a High-Quality System ______ Bits Per Pixel is Needed to Control the Intensity of Screen Positions.

1. 8

2. 16

3. 24

4. 32

Show me the answer

Answer: 3. 24.

Explanation:

• High-quality systems typically use 24 bits per pixel (8 bits for each of the red, green, and blue channels) to represent colors.

20. On a Black and White System with One Bit Per Pixel, the Frame Buffer is ______.

1. Light Emitted Display

2. Light Emitting Diode

3. Light Emitting Display

4. Light Emit Diode

Show me the answer

Answer: 2. Light Emitting Diode.

Explanation:

• In a black and white system with 1 bit per pixel, the frame buffer controls the Light Emitting Diodes (LEDs) or pixels on the screen.

21. For systems with multiple bits per pixel, the frame buffer is commonly called as ______.

1. Pixmap.

2. Pelmap

3. Bitsmap.

4. Bitmap.

Show me the answer

Answer: 1. Pixmap.

Explanation:

• A pixmap (pixel map) is a frame buffer used in systems where each pixel is represented by multiple bits.

• It stores color information for each pixel, allowing for more complex and detailed images.

• Unlike a bitmap, which typically uses 1 bit per pixel (black and white), a pixmap supports multiple bits per pixel, enabling grayscale or color representation.

22. Refresh rate near to $60$ frames per second is an effective technique for avoiding flicker.

1. $60$.

2. $45$.

3. $30$.

4. $15$.

Show me the answer

Answer: 1. $60$.

Explanation:

• The refresh rate is the number of times a display updates its image per second.

• A refresh rate of 60 frames per second (FPS) is considered effective for avoiding flicker because it matches the human eye's persistence of vision.

• Lower refresh rates (e.g., 30 FPS) can cause noticeable flickering, especially in bright or high-contrast displays.

23. Random scan monitors draw a picture ______ at a time.

1. One pixel.

2. One line.

3. Two pixel.

4. Two line.

Show me the answer

Answer: 2. One line.

Explanation:

• Random scan monitors (also called vector displays) draw images by directing the electron beam to trace lines directly on the screen.

• Unlike raster scan systems, which draw images pixel by pixel, random scan systems draw one line at a time.

• This method is efficient for rendering line-based graphics, such as wireframe models or technical drawings.

24. In raster scan system the ______ beam is swept across screen.

1. Electron.

2. Magnetic

3. Electro

4. Electro thermal

Show me the answer

Answer: 1. Electron.

Explanation:

• In a raster scan system, an electron beam is swept across the screen in a systematic pattern (usually left to right and top to bottom).

• The beam illuminates phosphors on the screen, creating the image.

• This method is used in CRT (Cathode Ray Tube) monitors and televisions.

25. In raster scan system the electron beam is swept across screen from ______.

1. Right to left.

2. Bottom to top.

3. Top to bottom.

4. Side to side.

Show me the answer

Answer: 3. Top to bottom.

Explanation:

• In a raster scan system, the electron beam moves from top to bottom in a series of horizontal lines.

• Each pass from left to right across a line is called a scan line, and the entire process is repeated to refresh the image.

• This top-to-bottom scanning ensures consistent and smooth image rendering.

26. A CRT monitor displays color picture by using a combination of phosphor that emits light of ______ color.

1. Same.

2. Different.

3. Many.

4. Only one.

Show me the answer

Answer: 2. Different.

Explanation:

• A CRT monitor uses phosphors that emit light of different colors (typically red, green, and blue).

• By combining these colors in varying intensities, the monitor can produce a wide range of colors.

• This principle is known as additive color mixing.

27. Shadow mask methods are commonly used in raster scan system including ______.

1. Monitor.

2. Random scan system.

3. Beam penetration method.

4. Color tv.

Show me the answer

Answer: 4. Color tv.

Explanation:

• The shadow mask method is a technique used in color CRT displays, including color TVs and computer monitors.

• It involves a perforated metal sheet (shadow mask) that aligns the electron beams with the correct phosphor dots on the screen.

• This ensures accurate color reproduction by preventing overlapping of red, green, and blue phosphors.

28. In flat panel display the emissive displays are devices that convert electric energy into ______.

1. Obscurity

2. Light energy.

3. Stimulating energy.

4. Non emitting energy.

Show me the answer

Answer: 2. Light energy.

Explanation:

• Emissive displays (e.g., OLED, plasma) are flat panel displays that convert electrical energy directly into light energy.

• Unlike non-emissive displays (e.g., LCDs), which require a backlight, emissive displays generate their own light, resulting in better contrast and energy efficiency.

29. In liquid crystal display the flat panel device is referred to as a LCD.

1. Matrix.

2. Passive.

3. Active.

4. Submissive.

Show me the answer

Answer: 2. Passive.

Explanation:

• A passive LCD refers to a type of liquid crystal display that uses a simple grid of electrodes to control the pixels.

• Unlike active matrix LCDs (which use thin-film transistors for each pixel), passive LCDs are less expensive but have slower response times and lower image quality.

30. The refresh buffer also called a ______ buffer.

1. Frame.

2. Element.

3. Resolution.

4. Bitmap.

Show me the answer

Answer: 1. Frame.

Explanation:

• The refresh buffer (or frame buffer) is a portion of memory that stores the image data to be displayed on the screen.

• It holds the color and intensity information for each pixel, which is continuously read by the display controller to refresh the screen.

31. Each screen point is referred to as a ______.

1. Point.

2. Pixel.

3. Position.

4. Element.

Show me the answer

Answer: 2. Pixel.

Explanation:

• A pixel (picture element) is the smallest controllable unit of a digital image displayed on the screen.

• Each pixel represents a single point in the image and contains color and brightness information.

32. Refreshing on raster-scan displays is carried out at the rate of $60$ to $80$ ______ per second.

1. Points.

2. Pixels

3. Positions

4. Frames.

Show me the answer

Answer: 4. Frames.

Explanation:

• Refreshing on raster-scan displays is done at a rate of 60 to 80 frames per second (FPS).

• This ensures smooth motion and reduces flickering, as the human eye perceives updates above 24 FPS as continuous motion.

33. The raster-scan systems, each frame are displayed in two passes using an ______ procedure.

1. Interlaced refresh.

2. Providing.

3. Refresh.

4. Vector-displays.

Show me the answer

Answer: 1. Interlaced refresh.

Explanation:

• Interlaced refresh is a technique where each frame is displayed in two passes: first the odd-numbered scan lines, then the even-numbered ones.

• This reduces bandwidth requirements and was commonly used in older CRT televisions.

34. The magnetic field produced by each pair of coils results in a ______.

1. Transverse deflection force.

2. Electron beam.

3. Generic field

4. Horizontal deflection.

Show me the answer

Answer: 1. Transverse deflection force.

Explanation:

• In CRT displays, magnetic fields produced by deflection coils create a transverse deflection force that steers the electron beam across the screen.

• This allows the beam to reach every part of the screen, enabling image rendering.

35. A property of video monitors is ______.

1. Length.

2. Centimeter

3. Direction

4. Aspect ratio.

Show me the answer

Answer: 4. Aspect ratio.

Explanation:

• The aspect ratio is the ratio of the width to the height of a display.

• Common aspect ratios include 4:3 (standard) and 16:9 (widescreen), which determine the shape and proportions of the displayed image.

36. Intensity of the electron beam is controlled by setting voltage levels on the ______.

1. Control panel.

2. Connector pins.

3. Electron gun.

4. Control grid.

Show me the answer

Answer: 4. Control grid.

Explanation:

• The control grid in a CRT regulates the intensity of the electron beam by varying the voltage applied to it.

• Higher voltages allow more electrons to pass through, increasing brightness, while lower voltages reduce brightness.

37. The ______ emits a small spot of light at each position contacted by the electron beam.

1. Electron gun.

2. Phosphor

3. Control grid.

4. Cathode.

Show me the answer

Answer: 2. Phosphor.

Explanation:

• Phosphor is a material coated on the inside of the CRT screen that emits light when struck by the electron beam.

• Different phosphors emit different colors, enabling color displays.

38. The maximum number of points that can be displayed without overlap on a CRT is referred to as its ______.

1. Persistence.

2. Resolution

3. Non persistence.

4. Distribution.

Show me the answer

Answer: 2. Resolution.

Explanation:

• Resolution refers to the maximum number of distinct points (pixels) that can be displayed on a screen without overlap.

• Higher resolution means more detail and sharper images.

39. Sterio scopic viewing is also a part in ______.

1. Virtual reality system.

2. Actual reality system.

3. Essential system

4. Implicit system.

Show me the answer

Answer: 1. Virtual reality system.

Explanation:

• Stereoscopic viewing creates a 3D effect by presenting slightly different images to each eye, mimicking human depth perception.

• It is a key component of virtual reality systems, enhancing immersion and realism.

40. The output devices in a graphics system is a ______.

1. Video monitor.

2. Cathode ray tube.

3. Video display devices.

4. Deflection CRT.

Show me the answer

Answer: 3. Video display devices.

Explanation:

• Video display devices are the primary output devices in graphics systems, including monitors, projectors, and screens.

• They render visual information generated by the graphics system.

41. The focusing system in a CRT is needed to force the electron beam to converge into a ______ as it strikes the phosphor.

1. Large spot.

2. Small spot.

3. Double spot

4. Spot.

Show me the answer

Answer: 2. Small spot.

Explanation:

• The focusing system in a CRT ensures the electron beam converges into a small spot when it hits the phosphor.

• This sharp focus is essential for producing clear and detailed images.

42. A shadow-mask CRT has ______ phosphor color dots at each pixel position.

1. Five.

2. Four

3. Three

4. Two.

Show me the answer

Answer: 3. Three.

Explanation:

• A shadow-mask CRT has three phosphor color dots (red, green, and blue) at each pixel position.

• These dots are arranged in a triangular pattern and are illuminated by separate electron beams.

43. The ______ shadow-mask method is commonly used in color CRT systems.

1. Delta-delta.

2. Beta-beta.

3. Delta-beta.

4. Alpha-alpha.

Show me the answer

Answer: 1. Delta-delta.

Explanation:

• The delta-delta shadow-mask method is a common technique in color CRT systems.

• It uses a triangular arrangement of phosphor dots and three electron guns to produce accurate color images.

44. Color CRTs in graphics systems are designed as ______.

1. CRT monitors.

2. DVST monitors.

3. RGB monitors.

4. Color monitors.

Show me the answer

Answer: 3. RGB monitors.

Explanation:

• RGB monitors are color CRTs that use red, green, and blue phosphors to create a wide range of colors.

• They are widely used in graphics systems for their ability to display vibrant and accurate colors.

45. DVST stands for ______.

1. Device View Storage Tube.

2. Direct View Storage Tube.

3. Direct View Space Tube.

4. Device View Space Tube.

Show me the answer

Answer: 2. Direct View Storage Tube.

Explanation:

• DVST stands for Direct View Storage Tube, a type of CRT that retains an image without needing constant refreshing.

• It was used in early computer graphics systems for its ability to display static images efficiently.

46. The emissive displays are device that convert electrical energy into ______.

1. Light.

2. Image

3. Pixel

4. Colors

Show me the answer

Answer: 1. Light.

Explanation:

• Emissive displays (e.g., OLED, plasma) convert electrical energy directly into light energy.

• This makes them more energy-efficient and capable of producing deeper blacks and higher contrast compared to non-emissive displays.

47. The plasma is also called as ______ displays.

1. Image.

2. Glass

3. Gas-discharge.

4. Glass-discharge

Show me the answer

Answer: 3. Gas-discharge.

Explanation:

• Plasma displays are also known as gas-discharge displays because they use ionized gas (plasma) to produce light.

• Each pixel in a plasma display contains tiny cells of gas that emit ultraviolet light when electrically charged.

48. A beam of slow electrons excites only the outer ______ layer.

1. Blue.

2. Green

3. White

4. Red

Show me the answer

Answer: 4. Red.

Explanation:

• In beam penetration CRT displays, a beam of slow electrons excites only the outer red phosphor layer.

• Faster electrons penetrate deeper layers to excite green or blue phosphors, enabling color display.

49. A beam of very fast electrons penetrates through the red layer and excites the inner ______ layer.

1. Blue.

2. Green

3. White

4. Red

Show me the answer

Answer: 2. Green.

Explanation:

• In beam penetration CRT displays, a beam of very fast electrons penetrates the outer red layer and excites the inner green phosphor layer.

• This allows for the display of multiple colors by varying the electron beam's speed.

50. LED stands for ______.

1. Light Emitted Display.

2. Light Emitting Diode.

3. Light Emitting Display.

4. Light Emit Diode.

Show me the answer

Answer: 2. Light Emitting Diode.

Explanation:

• LED stands for Light Emitting Diode, a semiconductor device that emits light when an electric current passes through it.

• LEDs are widely used in displays, lighting, and indicators due to their energy efficiency and long lifespan.