Punjab State Board PSEB 7th Class Computer Science Book Solutions Chapter 7 Introduction to Multimedia Textbook Exercise Questions and Answers.
PSEB Solutions for Class 7 Computer Science Chapter 7 Introduction to Multimedia
Computer Guide for Class 7 PSEB Introduction to Multimedia Textbook Questions and Answers
1. Fill in the Blanks
Question 1.
Multimedia is a combination of two words …………… and …………….
(a) Images Sound
(b) Audio, Video
(c) Multi, Media
(d) Hardware, Software.
Answer:
(c) Multi, Media
Question 2.
Animation is of two types, these are …………… and …………… .
(a) Analog, Digital
(b) Static, Hyper
(c) Raster, Bitmap
(d) Path, Frame.
Answer:
(d) Path, Frame.
Question 3.
Requirements for Multimedia are …………… and …………… .
(a) Images, Sound
(b) Analog, Digital
(c) Hardware, Software
(d) Multimedia.
Answer:
(c) Hardware, Software
Question 4.
Input devices consists of …………… and …………… .
(a) Monitor, Printer
(b) RAM, Hard Disk
(c) Keyboard, Mouse
(d) Hardware, Software.
Answer:
(c) Keyboard, Mouse
Question 5.
In Multimedia, Text is of …………… and …………… type.
(a) Analog, Digital
(b) Raster, Bitmap
(c) Static, Hyper
(d) Path, Frame.
Answer:
(c) Static, Hyper
2. Very Short Answer Type Questions
Question 1.
In how many types a video can be classified?
Answer:
Video can be divided into two types: Analog and Digital video.
Question 2.
There are how many types of text?
Answer:
There are two types of text, Static text and Hyper text.
Question 3.
Write the name of any one type of animation.
Answer:
Path animation.
Question 4.
Write any one application of Multimedia.
Answer:
Multimedia can be used in the field of education; it is used to teach students visually.
3. Short Answer Type Questions
Question 1.
What is an Animation?
Answer:
Animation is the process of displaying multiple images one after the other. For example: Cartoon movies, games etc. There are two types of animation.
Path Animation: In this animation, path geometry is used as an input.
Frame Animation: In this animation, pictures are shown moving in a frame.
Question 2.
What is Video?
Answer:
Video means moving pictures with sound. This is the best way to communicate with each other. It is used in multimedia to present more information and saves a lot of time. The most commonly used software for watching videos are: Quick Time, Real Player, window media player.
Question 3.
What is Multimedia Conferencing?
Answer:
Multimedia Conferencing is a process of interacting with various people all around the world using tools of multimedia like camera, microphone, a display and so on.
There are various software and applications that allow you to do that.
4. Long Answer Type Questions
Question 1.
What is Multimedia? Explain the components of multimedia.
Answer:
Multimedia is a form of communication that combines different types of data such as text, audio, images, animations or video into a single presentation. Components of multimedia are as follow :
1. Text:
It is a combination of characters and certain symbols. Text is commonly used to send messages. In multimedia we can present text in a very attractive way using fonts, colors and styles. The most commonly used software for viewing text files are Microsoft Word, Notepad, Word Pad etc.
We can use two types of text in multimedia
(а) Static Text: Static text is a simple text that we use to type messages or other documents or given along with images to describe the image.
(b) Hypertext: Hypertext is text that contains links to other texts.
2. Images: In multimedia we make the concept more effective and presentable with the help of images. There are two types of images :
(a) Raster or Bitmap Images: Bitmap images are real images that are captured from digital cameras or scanners.
(b) Vector Images:
Vector images are drawn using lines, circles and other mathematical equations. These images remain smooth even when zoomed in. Vector imagery requires less memory to store and thus we can use less data to represent the image. These images are editable.
3. Audio:
In multimedia audio means recording or playing sound, speeches, music etc. Audio is an important part of multimedia because the concept that we cannot understand in the form of text, we explain in audio format. Some sound formats are :
(а) MIDI:
The full name of MIDI is Musical Instrument Digital Identifier. It is a communication tool developed for computers and electronic devices. It’s a flexible and easy way to create music projects in multimedia.
(b) Digital Audio: Digital audio is a better alternative to MIDI files. Digital sound files are created from predefined music to record live music.
4. Video:
Video means moving pictures with sound. This is the best way to communicate with each other. It is used in multimedia to present more information and saves a lot of time. The video is divided into two parts:
(a) Analog Videos:
Analog video is created in a video camera. Analog video, represents moving visual images (video) in the form of analog signals. The red, green and blue intensities are used to record these videos.
(b) Digital Videos:
Digital video is an electronic representation of moving visual images (video) in the form of encoded digital data. Digital video is audio/visual data in a binary format. Information is ‘ represented as a sequence of zeroes and ones.
5. Animation:
Animation is the process of displaying multiple images one after the other. Animation is a method in which images are shown as a video at high speed. For example: Cartoon movies, games etc. There are two types of animation.
- Path Animation: In this animation, path geometry is used as an input.
- Frame Animation: In this animation, pictures are shown moving in a frame.
Question 2.
What are the requirements for multimedia?
Answer:
In multimedia, projects are created by combining text, graphics, sounds, videos etc. These projects require verity of hardware and software. The hardware and software commonly used in multimedia are as follows :
Hardware Requirements:
The following hardware is required to create multimedia apps. These hardware include inputs, outputs and storage devices.
1. Input Devices: Those devices which are used to enter data and instructions into a computer are called input devices. They add text, graphics, sounds, videos etc. to projects. The following are the input
devices used in multimedia,
- Keyboard
- Mouse
- Scanner
- Touch Screen
- Microphone
- Voice Recognition System
- Digital Camera
- Joystick
- Light Pen
2. Output Devices:
Those devices which are used to receive data from a computer. For example: printing a document, displaying images on a screen and playing audio or video. Below are the names of some of the output devices.
- Monitor
- Audio Devices
- Video Devices
- Projectors
- Speakers
- Printers etc.
3. Storage Devices:
The process of permanently saving data and instructions is called storage and the devices in which multimedia projects are stored are called storage devices. The following are some of the storage devices used to store multimedia projects :
- Hard Disk Drive
- Magnetic Tape
- RAM if) External Disk Drive
- CD-R, CD-RW, DVD
- Pen Drive
Software Requirements:
Multimedia software is a tool used to edit and manage the key elements of multimedia such as text, graphics, sound, animation and video. The following are some of the specific software used for multimedia projects.
- Adobe Director
- Create Together
- Media Blander
- Media Works 6.2
- Play mo
- Multimedia Builder
Question 3.
What is a Multimedia Presentation? What should we keep in mind before preparing Multimedia presentation?
Answer:
The multimedia presentations are electronic documents that can include text, diagrams, graphics, photographs, sounds, animations, video clips etc.
Multimedia presentations are used to convey a message to others using a variety of communication methods. These presentations usually include text, animation, video, audio or interactive features such as forms, popup and more. The following should be kept in mind when creating a multimedia presentation :
- Text should be kept to a minimum in multimedia presentations.
- The level of audio and music quality should be good.
- The keyboard and mouse should be accessible for the convenience of the user.
- Multimedia presentation should be effective and small in size.
Question 4.
Write down applications of multimedia.
Answer:
Following are the common areas of applications of multimedia :
1. Education: Multimedia is used to teach students in school and colleges. Nowadays multimedia CDs are used instead of text books.
2. Business:
Multimedia applications are used in business for marketing, advertising, network communications, online shopping and more. It is also used in commercial marketing to motivate customers to buy products.
3. Advertisement:
Advertising industry uses multimedia to promote businesses, products and services. Multimedia advertising is done using animations and graphic design. Television, radio and print advertising are the most common mediums used in advertising.
4. Entertainment:
Multimedia is widely used in the entertainment industry. It is used especially in movies and video games to create special effects. Music and video apps are a great example of multimedia in entertainment.
5. Public Places:
Multimedia is available in many public places like trade shows, libraries, railway stations, museums, malls, airports, banks, hotels and exhibitions in the form of kiosks. It provides information to the customers and helps them.
6. Software:
Software engineers can use multimedia in computer entertainment to design everything from entertainment to digital games; it can be used as a learning process.
7. Medical Services:
Multimedia also use in Hospitals. For surgery methods, Tiny digital cameras are inserted in human body and it displays the inner scene of the body. In this way the medical practitioners were able to see the inner part without examine it.
PSEB 7th Class Computer Guide Introduction to Multimedia Important Questions and Answers
1. Fill in the Blanks
Question 1.
Coral Draw is …………… software.
(a) Text
(b) Word
(c) System
(d) Graphics.
Answer:
(d) Graphics.
Question 2.
Graphics are of …………… type.
(a) Two
(b) Three
(c) Four
(d) Five.
Answer:
(a) Two
Question 3.
The movement of graphics is called …………… .
(a) Motion
(b) Move
(c) Animation
(d) Effect.
Answer:
(c) Animation
Question 4.
…………… video is created in a video camera.
(a) Analog
(b) Digital
(c) Motion
(d) None of these.
Answer:
(a) Analog
Question 5.
…………… devices are used to receive data from a computer.
(a) Input
(b) Storage
(c) Output
(d) All of these.
Answer:
(c) Output
Question 6.
A group of slides is known as a slide …………… .
(a) Group
(b) Deck
(c) Bunch
(d) Presentation.
Answer:
(b) Deck
Question 7.
The process of permanently saving data and instructions is called …………… .
(a) Storage
(b) Video
(c) Table
(d) Document.
Answer:
(a) Storage
Question 8.
Full form of the RTF is …………… .
(a) Read Table Format
(b) Rich Text Format
(c) Read Text Format
(d) Rich Table Format.
Answer:
(b) Rich Text Format
2. True/False
1. The combination of different media is called multimedia.
Answer:
True
2. In multimedia pictures can be animated and voice can be heard by the listeners.
Answer:
True
3. The size of the bitmap image is smaller than the vector image.
Answer:
False
4. Multimedia should be full of text.
Answer:
False
3. Write the Full Forms
Question 1
1. RTF
2. TIFF
3. DIB
4. BMP
5. GIF
6. JPEG
7. PNG
8. WAV
9. MP3
10. AIFF
11. WMA
12. RA
13. AVI
14. MPEG.
Answer:
1. RTF → Rich Text Format
2. TIFF → Tagged Image File Format
3. DIB → Device Independent Bitmap
4. BMP → Bitmap
5. GIF → Graphical Interface Format
6. JPEG → Joint Photographic Expert Group
7. PNG → Portable Network Graphics
8. WAV → Wave form Audio File Format
9. MP3 → MPEG Layer 3 Format
10. AIFF → Audio Interchange File Format
11. WMA → Windows Media Audio
12. RA → Real Audio Format
13. AVI → Audio/Video Interleave
14. MPEG → Moving Picture Expert Group.
4. Short Answer Type Questions
Question 1.
What are Graphics?
Answer:
Graphic is an image or visual presentations of an object, displayed on a computer screen. Examples are photographs, drawing, graphics designs, maps, engineering drawings, or other images. Graphics often combine text and illustration.
Question 2.
What is Multimedia?
Answer:
Multimedia means more than one medium. Multimedia is a collection of many media. It includes a wide variety of media. When a lot of media like pictures, texts, sounds, movies etc. come together it becomes multimedia. Multimedia is being used as a means of entertainment, for education.
Question 3.
Name the different media that make multimedia.
Answer:
The different media that make multimedia are as follow:
- Text: Text is a combination of characters and certain symbols. Text is commonly used to send messages.
- Images: In multimedia we make the concept more effective and presentable with the help of images.
- Animation: Animation is the process of displaying multiple images one after the other.
- Audio: In multimedia audio means recording or playing sound, speeches, music etc..
- Film: It is an essential part of multimedia. Movies impress the audience a lot.
Question 4.
What kind of hardware is required for multimedia?
Answer:
The hardware required for multimedia is as follows:
- Sound Card
- Monitor
- C.D. Rom Drive
- Microphone
- Web or Digital Camera
- Headphones.
5. Long Answer Type Questions
Question 1.
What are the file formats used in multimedia?
Answer:
File Format for Multimedia:
File formats are designed to store specific types of information. Such as JPEG for storing raster data, AI for storing vector data, WAV and MPEG for storing audio data and video data.
Before reading about the file format in multimedia, we need to know how many types of files are in multimedia. Multimedia consists of 3 types of files which are mentioned ahead:
- Uncompressed: These are the files which are not compressed and are capable of storing a large file size.
- Lossless: Files that can be compressed and when they are compressed there is no loss in image quality such as (Vector images) which do not lose quality even when zoomed in and the image will remain clear.
- Lossy: Files that lose their quality when compressed. Such as bitmap Images. The easiest way to find any file type is to look at the file extension. The file extension determines which file it is.
Question 2.
Write the types of multimedia presentations.
Answer:
Types of Multimedia Presentation
There can be many types of multimedia presentations, some of which are as follows:
1. Virtual Presentation:
Where hosts and viewers attend the presentation remotely, are becoming common place. It is a technology that allows us to gather information on any topic and create a virtual presentation using high technology hardware software tools.
2. Slide Presentation:
A slide is a presentation page. A group of slides is known as a slide deck. A slide show is a display of a series of slides or images in an electronic device or on a projection screen. A slide can be a 35 mm slide seen with a slide projector. Presentation slides can be created in many pieces of software such as Microsoft PowerPoint, Apple Keynote, LibreOffice Effects, Preeze.
3. Web Presentations:
When we add audio, video, animation etc. to web pages instead of static photos and text, web Pages turn into web presentations.
Question 3.
What are the audio file formats in multimedia?
Answer:
Audio File Format:
Audio file format is the file format used to store digital audio data on a computer system. Below are some audio file formats :
1. MP3:
The full form of MP3 is MPEG audio Layer-3. It is a standard technology and format that reduces the size of the file by one-tenth of the actual size and does not allow any loss in sound quality. The extension of these files is MP3.
2. WAV:
The most popular audio file format in Windows for storing compressed sound files. In order to the reduced the size of the files, these files can be converted to MP3 file format. The extension of these files is .WAV.
3. WMA (Window Media Audio):
These file formats are used to encode digital audio files similar to MP3. It can compress files at a higher rate than MP3. WMA files can be compressed to any size to match many different connection speeds or bandwidths. Their file extension is .wma.
4. AAC (Advanced Audio Coding):
The default audio format of Apple iTune. They work very well on Apple computing but do not work on web browsers. Their file extension is .aac.
5. Real Audio:
This format has been developed by Real Media to allow steaming of audio with low bandwidth. Its file extensions are ,rm, .ram.
Question 4.
What are the video file formats in multimedia?
Ans:
Video File Format:
Video files are a collection of images, audio and other data. The following are many different formats for encoding and saving video data.
1. AVI (Audio Video Interleave):
One of the oldest video formats developed by Microsoft. Due to its simple architecture, these files are able to run on different systems such as Windows, Macintosh, Linux. The file extension of these files is .avi.
2. MPEG (Moving Pictures Expert Group):
The first popular video format on the web is MPEG, These are compressed video files that can store both audio and video files. The file extension of these files is .mpeg.
3. MP4:
MP4 is one of the earliest digital video file formats introduced in 2001. Most digital platforms and devices support MP4. An MP4 format can store audio files, video files, still images and text. In addition, MP4 delivers high quality video with relatively small files. The file extension of these files is .mp4.
Question 5.
What are Image file formats in multimedia?
Answer:
Image File Format:
There are many different image formats and image file extensions that can be used to create and save images to a computer. The most common image formats are listed below :
1. TIFF:
Stands for Tagged Image File Format. TIFF file format is widely used bit mapped file format. TIFF files originally use lossless compression. Today TIFF files also use lossy compression according to the requirement. It allowing for very high-quality images but also larger file sizes.TIFF can store many different types of image such as 1 bit image, gray scale image, 8 bit color image, 24 bit RGB image etc. It is supported by many image editing applications, software used by scanners and photo retouching programs. The file extension of these files is .tiff.
2. BMP:
The bitmap file format (BMP) is a very basic format supported by most Windows applications. BMP files are uncompressed. It allowing for very high-quality images but also larger file sizes. Therefore, these are not suitable for the internet. BMP can store many different type of image: 1 bit image, grayscale image, 8 bit color image, 24 bit RGB image etc. The file extension of these files is .bmp.
3. GIF (Graphics Interchange Formats):
The GIF format is one of the most popular on the Internet due to its compact size. They are widely used for web graphics, as they are limited to 256 colors and can be animated. The file extension of these files is .gif.
4. JPEG (Joint Photographic Experts Groups):
Jpeg is a “loosy” format meaning it compresses the image to make it a smaller file. Compression of the image causes loss of image quality but this loss is usually not noticeable. JPEG files are very common on the Internet and JPEG is a popular format for digital cameras. The file extension of these files is -jpeg.
5. PNG (Portable Network Graphics):
PNG files are a lossless image format designed to actually improve and convert GIF format. Unlike the 256 colors supported by GIF, PNG files can handle up to 16 million colors. The file extension of these files is .png.
6. RAW:
Raw images are images that are not processed by a camera or scanner. Most digital SLR cameras can shoot in RAW format. The file extension of these files is .raw.