Computer Graphics MCQ Quiz - Objective Question with Answer for Computer Graphics - Download Free PDF

Concept:

The general equation of sphere is given as:

x2 + y2 + z2 + 2ux + 2vy + 2wz + d = 0  ----(1)

centre at (-u, -v, -w) and

radius \(r = √ {{u^2} + {v^2} + {w^2} - d}\) ---(2)

Calculation:

Given:

x2 + y2 + z2 + x + y - 2 = 0

Compare given equation with equation (1)

x2 + y2 + z2 + 2ux + 2vy + 2wz + d = 0

u = -0.5, v = -0.5, w = 0, d = -2

Radius can be calculated from equation (2)

\( = √ {{{\left( { - \frac{1}{2}} \right)}^2} + {(\frac{-1}{2})^2} + {{\left( {0} \right)}^2} + 2} \)

= √5/2

The correct answer is option 1.

Concept:

Animation:

Animation is a technique that manipulates figures to make them appear to move. Images in traditional animation are hand-drawn or painted on translucent celluloid sheets before being captured and presented on film.

The majority of animations today are created using computer-generated images (CGI).

Different formats of animation are:

• MPEG-4 Face and Body Animation (MPEG-4 FBA) is part of MPEG-4 International Standard (ISO14496) dealing with animation of human or human-like characters.
• Quick time (QT/Moov) developed by Apple, the MOV file extension represents the QuickTime video format natively used in the QuickTime framework of Mac.
• Flic Format (FLI/FLC) is similar to animated GIFs. The FLIC animation format was originally developed by Autodesk for use with Autodesk Animator (FLI) and Autodesk Animator Pro (FLC).

Explanation:

Amiga (SGI) is not a format of animation. Silicon Graphics Incorporated (SGI) is best known for products used to develop computer graphics such as those used to create special effects and animation in motion pictures

Hence the correct answer is Amiga (SGI).

The correct answer is option 3.

Concept:

High-Definition Multimedia Interface (HDMI):

The High-Definition Multimedia Interface (HDMI) is a proprietary audio/video interface that allows an HDMI-compliant source device, such as a display controller, to send uncompressed video data and compressed or uncompressed digital audio data to a compatible computer monitor, video projector, digital television, or digital audio device.

• HDMI is a digital video standard that replaces analog video standards.
• HDMI allows for a variety of connections to be made with only a few wires, simplifying the connection procedure and removing the clutter of several cords.
• Many current PCs and laptops feature an HDMI port, which allows you to connect your TV to a computer monitor using this cable.

Hence the correct answer is Definition, Multimedia.

The correct answer is option 1.

Key Points

• The Professional Graphics Controller (PGC, sometimes known as Professional Graphics Adapter or Professional Graphics Array) is an IBM graphics device for PCs.
• It is made up of three linked PCBs that each have its own processor and memory.
• The PGC was the most powerful graphics card for the IBM XT at the time of its debut, and it was designed for activities like CAD.
• Professional Graphics Controller provided a maximum resolution of 640x480 pixels with 256 colors and a refresh rate of 60 hertz, which was greater than the Color Graphics Adapter and Enhanced Graphics Adapter.
• This mode is not BIOS-supported.
• It had 320 kB of display RAM and an Intel 8088 CPU on board and was aimed at the computer-aided design sector.

Hence the correct answer is professional graphics array.

Answer: Option 4

Concept: 

JPEG:

JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography.

MPEG:

The Moving Picture Experts Group (MPEG) is a working group of authorities that was formed by ISO and IEC to set standards for audio and video compression and transmission. The term also refers to the family of digital video compression standards and file formats developed by the group.

Explanation: 

MPEG involves both spatial compression and temporal compression. The former is similar to JPEG, and the latter removes redundant frames.

The correct answer is ODT.

Key Points

• A bitmap basically describes a type of image. 
• Pixels all the basic sources of information.
• BMP, GIF, JPEG, EXIF, PNG, and TIFF are bitmap file formats.
• Bitmap format commonly used raster graphic format for saving image files. 
• Raster graphics are independent of display devices which means a bitmap image file can be viewed without any graphics adaptor. 
• The file can store a 2D digital image in both monochrome and colour format.

The Correct Answer is Joystick.

 Key Points

• Joy Stick is a  pointing device used to move an object on a screen in any direction.
• It employs a vertical rod mounted on a base with one or two buttons.
• Joysticks are often used to control video games, and usually have one or more push-buttons whose state can also be read by the computer.

 Additional Information

• Optical Mark Reading (OMR)
  • Optical Mark Reading (OMR) is a method of entering data into a computer system.
  • Optical Mark Readers reads pencil or pen marks made in pre-defined positions on paper forms as responses to questions or tick list prompts.
• Visual Display Unit
  • Visual Display Unit is a device for displaying input signals as characters on a screen.
  • The monitor is an example of VDU.
• MIDI (Musical Instrument Digital Interface) controller
  • It is a way to connect devices that make and control sounds — such as synthesizers, samplers, and computers — so that they can communicate with each other.

The correct answer is Red, Green, Blue.

• Red, green, and blue are the primary colours of light—they can be combined in different proportions to make all other colors.
• There are two colour models:
  • Light Color Primaries (Red, Green, Blue).
  • Pigment Color Primaries (Cyan, Magenta, Yellow).

Important Points

• Primary colours make all other colours:
  • Red + Green = Yellow.
  • Green + Blue = Cyan.
  • Blue + Red = Magenta.
• There are three Secondary Colors (S'): Orange, Green, Violet.
• There are six Tertiary Colors (Ts): Red-Orange, Yellow-Orange, Yellow-Green, Blue-Green, Blue-Violet, Red-Violet.
  • Tertiary is formed by mixing a primary with a secondary.

Additional Information

• In terms of wavelengths, visible light ranges from about 400 nm to 700 nm.
• light with a wavelength of about 400 nm is seen as violet, and light with a wavelength of about 700 nm is seen as red.

Key Points

• The inner surfaces of human eyes contain photoreceptors—specialized cells that are sensitive to light and relay messages to the brain.
  • There are two types of photoreceptors: cones (which are sensitive to colour) and rods (which are more sensitive to intensity).
  • Humans are able to see an object when light from the object and enters their eyes and strikes these photoreceptors.

The correct answer is Both 1 and 2.

Key Points

• Multimedia is the use of a computer to present and combine text, graphics, audio, and video with links and tools that allow the user to navigate, interact, create and communicate.
• Multimedia is broadly divided into linear and non-linear multimedia.

Additional Information

• Linear Multimedia
  • The end-user cannot control the content of the application.
  • A linear multimedia application lacks all the features with the help of which, a user can interact with the application such as the ability to choose different options, click on icons, control the flow of the media, or change the pace at which the media is displayed.
  • It works very well for providing information to a large group of people such as at training sessions, seminars, workplace meetings, etc.
• Non-Linear Multimedia
  • The end-user is allowed the navigational control to rove through multimedia content at his own desire.
  • The user can control the access of the application.
  • Non-linear offers user interactivity to control the movement of data. For example computer games, websites, self-paced computer-based training packages, etc.

The correct answer is "option 4".

CONCEPT:

"Pixel" is short for Picture Element.

Pixels are the small little dots that make up the images on a computer display.

EXPLANATION:

Pixel count for the span & inter-span length.

A pixel mask is used to specify the inter-space spacing.

The pixel mask is a string that contains 0 & 1 to specify the positions to plot along the line path.

Eg. 1110000

Hence, the correct answer is "option 4".

Additional Information

1.Resolution refers to the size of the pixel.

2.Smaller the pixel, higher the resolution.

The correct answer is option 1.

Key Points

 Horizontal retracing is also known as vertical retracing. The beam returns to the left of the screen at the end of each scan line to show the next scan line.

∴ Hence the correct answer is The path an electron beam takes when returning to the left side of the CRT.

The correct answer is Quality Performance.

• The terms HD, SD, VGA etc. are related to Quality Performance.

Key Points

• There are various ways to determine video quality.
• “SD” stands for “standard definition,” and “HD” stands for “high definition.”
• HD and SD are measurements of video quality in terms of pixels.
• Video Graphics Array (VGA) is a popular display standard developed by IBM and introduced in 1987.

The correct answer is "option 4".

CONCEPT: 

The components of the Memory tube display are:

1. Flooding gun

2. Collector 

3. Ground

Hence, Liquid crystal is not a component of the Memory tube display.

Additional Information

1.There are two types of guns in the Memory tube display: Primary gun and flooding gun.

2.Some other components of Memory tube display are:

a. Writing beam

b. storage grid

c. Screen

d. Focusing & deflection system

e. Flood electron

f. Ground/base 

Explanation:

• Computer Graphics refers to any sketch, drawing, special artwork or other material generated with the help of a computer to pictorially depict an object or a process or otherwise convey information, as a supplement to or instead of written descriptions.
• In computer graphics, the basic geometric transformations are both Translation and Rotation

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 option 1.

Key Points

 A group of pictures can contain the following picture types:

• I picture or Iframe (Intra coded picture) – a picture that is coded independently of all other pictures. Each GOP begins (in decoding order) with this type of picture.
• P picture or P frame (predictive coded picture) – contains motion-compensated difference information relative to previously decoded pictures. Each P picture can only reference one picture, and that picture must precede the P picture in display order as well as in decoding order and must be an I or P picture. 
• B picture or B frame (bi-predictive coded picture) – contains motion-compensated difference information relative to previously decoded pictures. Each B picture can only reference two pictures, the one which precedes the B picture in display order and the one which follows, and all referenced pictures must be I or P pictures.
• D picture or D frame (DC direct coded picture) – serves as a fast-access representation of a picture for loss robustness or fast-forward. D pictures are only used in MPEG-1 video.

∴ Hence the correct answer is A-frame.

The correct answer is an Input device.

Key Points

• Input Device
  • To enter data into a computer, an input device is required.
  • It can be defined as an electromechanical device that allows the user to enter data into the computer for analysis and storage and to give commands to the computer.
  • Example: Keyboard, Mouse, Scanner, etc.

Additional Information

• Output Device	It is any piece of computer hardware equipment used to communicate the results of data carried out by an information processing to the outside world. Example: Monitor, Printer, Plotter, etc.
  Memory device	It is a device or system that is used to store information for immediate use in a computer or related computer hardware and digital electronic devices.

Key Points

  A multimedia is a form of communication that combines different content forms such as text, audio, images, animations, or video into a single interactive presentation, in contrast to traditional mass media which featured little to no interaction from users, such as printed material or audio recordings. Popular examples of multimedia include video podcasts, audio slideshows, and Animated Videos. 

Multimedia can be recorded for playback on computers, laptops, smartphones, and other electronic devices, either on-demand or in real-time. In the early years of multimedia, the term "rich media" was synonymous with interactive multimedia. Over time, hypermedia extensions brought multimedia to the World Wide Web.

Hence the correct answer is Multimedia authoring tools.

Data:

total frames = 40

number of pixels in each frame = 880 × 600 

Number of bits in each pixel = 8 

Calculation:

Total bits per second = 880 × 600 × 40 × 8 = 153600000 

Bit rate in Mbps = 153. 6 Mbps

Explanation:

Scaling:

Scaling is a kind of transformation that is used to change the size of the object.
It can either expand the size or compress the size of the object. The size can be altered by multiplying the coordinates of the object by a factor which is called the scale factor. 

​Rotation:

Rotation can be defined as the process of rotating an object by a certain angle θ (theta). 

​Translation:

​Translation can be defined as the change in the position of an object on the screen. The position of an object gets changed by moving it along the X-Y direction. 

Reflection:

The object is laterally inverted along a line or point.
The size of the object remains the same.

Key Points

Multimedia authoring:

The creation of multimedia productions is sometimes called "videos" or "presentations".

Multimedia metaphor:

It is a set of user interface visuals, actions, and procedures that exploit specific knowledge that users already have of other domains. The purpose of the interface metaphor is to give the user instantaneous knowledge about how to interact with the user interface.

Authoring metaphors in multimedia Multimedia Authoring Metaphors.

• Scripting Language Metaphor.
• Slide Show Metaphor.
• Hierarchical Metaphor.
• Iconic/Flow-control Metaphor.
• Frames Metaphor.
• Card/Scripting Metaphor.
• Cast/Score/Scripting Metaphor.

Hence the correct answer is the Automatic metaphor.

The correct answer is "Memory/Keyboard".

Rest all are a part of a multimedia presentation.

Additional Information

Multimedia Presentation:

• A multimedia presentation is a type of presentation that uses several different forms of communication to get the message across.
• There are seven elements - text, graphics, photographs, sound, animation, video, and interactivity - that can be included in a multimedia presentation.
• Multimedia presentations have been around since Microsoft PowerPoint started offering animations and videos many years ago. You could say that most PowerPoint presentations are multimedia presentations.

The correct answer is option 4.

Key Points

 The Bezier curve is defined by P0 through Pn and n is named its order (n = 1 for the linear, 2 for the quadratic, etc.). The first and last checkpoints are often the endpoints of the curve, but interim checkpoints do not usually lie on the curve.

Statement I is incorrect

The cubic Bezier curve is defined by four points P0, P1, P2, and P3 in the plane or in greater space.

Statement II is correct.

A cubic bezier curve has four control points.

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.

Explanation:

• Some commonly used Input/Output devices are listed in the table below. 

Input device:

• An input device is a piece of hardware used to provide data to a computer used for interaction and control. It allows the input of raw data to the computer for processing.​
• Some of the input devices are
  • ​Keyboard: Keyboard is one of the primary input devices used to input data and commands. It has function keys, control keys, arrow keys, a keypad, and the keyboard itself with the letters, numbers, and commands.
  • Mouse: It is an input device used to control the cursor and coordinates. It can be wired or wireless.
  • Microphone: It is an input device that allows users to input audio into their computers.
  • Scanner: It is an input device that reads an image and converts it into a digital file. A scanner is connected to a computer through a USB.
  • Touchscreen: It is an input device that allows users to interact with a computer using their fingers. It is used widely in laptop monitors, smartphones, tablets, cash registers, and information kiosks.  
  • Plotter: The plotter is the computer's output device that could print graphics as well as accommodate full-size engineering and architectural drawings. Using multiple colored pens, plotters were also able to print in color long before inkjet printers became an alternative.