Graphics Systems MCQ Quiz in தமிழ் - Objective Question with Answer for Graphics Systems - இலவச PDF ஐப் பதிவிறக்கவும்

Concept:

Raster scan system; In this, electron beam move on the screen from top to bottom covering each row one by one.

Explanation:

Given resolution of the system is: 640 × 480

We have to store 12 bits per pixel.

Frame buffer size = resolution (number of pixels) × number of bits per pixel

Frame buffer size = (640 × 480) × 12 = 3686400 bits

Convert it into bytes.

Frame buffer size = 3686400/8 = 460800 Bytes = 460 .8 KB

The correct answer is GPU.

Key Points

• GPU stands for Graphics Processing Unit.
• It is a specialized electronic circuit designed to accelerate the processing of images and videos.
• GPUs are used in a variety of applications, including graphics rendering, machine learning, and cryptocurrency mining.
• They are known for their ability to handle large amounts of data simultaneously, making them ideal for complex computations.

Additional Information

• CPU
  • ​The Central Processing Unit is the primary component of a computer that performs most of the processing inside the computer.
  • It is often referred to as the brain of the computer.
• ROM
  • ​Read-Only Memory is a type of non-volatile memory used in computers and other electronic devices.
  • Data stored in ROM cannot be modified easily or at all.
• FPU
  • ​The Floating Point Unit is a part of a computer system specially designed to carry out operations on floating-point numbers.
  • It is also known as a math coprocessor or numeric coprocessor.

The correct answer is Fluorescence.

Key Points

• Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation.
  • It is a form of luminescence.
  • In a cathode ray tube (CRT) or other similar devices, when the phosphor coating is struck by the electron beam, it emits visible light through the process of fluorescence.
  • This emission of light occurs almost instantaneously with the exposure to the electron beam.
  • Fluorescence ceases almost immediately when the excitation source (electron beam) is removed.
  • This characteristic makes it suitable for applications requiring quick response times.

Additional Information

• Phosphorescence, on the other hand, involves a delayed emission of light and continues to glow even after the excitation source is removed.
• Persistence refers to the duration the screen continues to emit light after the electron beam has moved on.
• Retracing is the process where the electron beam returns to the beginning of the next line or frame in a CRT display.

The correct answer is Removing objects and lines

Key PointsClipping in computer graphics is the process of constraining the visibility of objects and lines within a defined view or volume, typically a rectangular window view. In simpler terms, it means cutting off areas of geometric shapes that lie outside the viewing volume.
This process is incredibly crucial in 2D and 3D graphics alike for several reasons:

• Performance Optimization: Rendering all elements in a given scene could be computationally intensive. By clipping objects that are not in the field of view, it significantly reduces the processing requirement, because these objects, despite being concealed, would still consume computational resources if not clipped.
• Visibility Maintenance: Clipping is also necessary for maintaining proper visibility of elements in the scene. For example, an object behind the viewer in a 3D scene doesn't need to be rendered. In complex scenes, this also accounts for different layers of objects, where objects in the foreground should block objects in the background.
• Correct perspectives in 3D spaces: 3D rendering involve translating three-dimensional coordinates to two-dimensional points to be displayed on the screen. Clipping ensures that the objects further away appear smaller and the ones closer look bigger, giving a sense of depth and maintaining correct perspective.

The primary types of clipping include Point Clipping, Line Clipping, Area Clipping (or Polygon Clipping), and Text Clipping. Each type has specific algorithms that work most efficiently for their respective tasks. The most well-known of these are the Cohen-Sutherland and the Liang-Barsky line-clipping algorithms.

The correct answer is Persistence.

Key Points 

• The duration of phosphorescence exhibited by a phosphor is known as persistence.
   
• Phosphorescence is a type of photoluminescence in which a material absorbs light energy and then emits it slowly over a longer period of time. The duration of the phosphorescence is known as persistence, and it is a characteristic property of the phosphor material. The higher the persistence of a phosphor, the longer it will continue to emit light after being exposed to a light source.
   
• This property is used in various applications, such as in the production of glow-in-the-dark materials and in cathode ray tubes (CRTs) for televisions and computer monitors.
  ​

Hence, The correct answer is Persistence.

Key Points

 The process of converting a vector graphic to a bitmap is also known as rasterizing.

When you export a file to a bitmap file format, such as TIFF, JPEG, CPT, or PSD, the same bitmap conversion options are available.

Hence the correct answer is rasterization.

Additional Information

• Quantization, involved in image processing, is a lossy compression technique achieved by compressing a range of values to a single quantum value. When the number of discrete symbols in a given stream is reduced, the stream becomes more compressible.
• pixelization is the deterioration of a low-resolution image caused by a lack of enough pixels to render an image smoothly.
• The sampling rate determines the spatial resolution of the digitized image, while the quantization level determines the number of grey levels in the digitized image.

Key Points

 Accelerated Graphics Port :

  An accelerated Graphics Port (AGP) is a point-to-point channel that is used for high-speed video output. This port is used to connect graphic cards to a computer's motherboard. It increases the speed at which machines can render graphics while using the system's resources more efficiently.

Hence the correct answer is the AGP slot

The correct answer is Graphical User Interface.

Key Points

• GUI
  • It stands for Graphical User Interface (GUI). Hence, Option 3 is correct.
  • It is a user interface that allows users to interact with electronic devices through graphical icons or visual indicators
  • It uses icons, menus, and other graphical representations to display information, as opposed to text-based commands.
  • The graphic elements enable users to give commands to the computer and select functions by using a mouse or other input devices.
  • The basic components of GUI are as follows,
  • Pointer
    • It is a symbol that appears on the display screen. It can be moved to select commands and objects.
  • Pointing device
    • It allows you to move the pointer and select objects on the screen, e.g. mouse or trackball.
  • Icons
    • It refers to small images on the display screen that represent commands, files, windows, etc. Using a pointer and pointing device, you can execute these commands.
  • Desktop
    • ​It is the display screen that contains the icons.
• 

• Graphics and image processing technique used to produce a transformation of one object into another is called animation.​

Important Point:

Morphing is a special effect in motion pictures and animations that changes one image or shape in to another through a seamless transition. It is a transformation of object shapes from one form to another