Long Answer Type Questions: Multimedia, Chat Sites and Social Networks | Computer Science for Grade 9 PDF Download

Q.1. What is chatting? State two advantages and disadvantages of chatting.

On the Internet, chatting is talking to other people who are using the Internet at the same time you are. Usually, this “talking” is the exchange of typed-in messages requiring one site as the repository for the messages (or “chat site”) and a group of users who take part from anywhere on the Internet.

Advantages

• Can communicate instantly
• Can attach files
• Fast
• Cheap (almost free)

Disadvantages

• Need internet connection
• Other person needs to be online
• Lose non verbal communication (body language, tone of voice)
• Very hard to spot emotions of the people at the other end, which could be upset and you wouldn’t know it
• Usually open to other people so not very secure.

Q.2. What is cyber bullying?

Cyber bullying is a type of cybercrime that involves harassment, where the abusive and insulting messages are repeatedly sent to the victim. Other kinds of cyber bullying such as flaming, denigration, impersonation, outing, trickery, and exclusion are also found in the world of social networks.

Q.3. What is virtual reality? What are its kinds?

Virtual Reality: It is a kind of technology to create a simulated environment. Unlike traditional user interfaces, Virtual Reality places the user inside an experience. Instead of viewing a screen in front of them, users are immersed and able to interact with 3D worlds.

There are two kinds of Virtual Reality techniques:

• That allows a user to view a picture from many angles.
• A “world” is constructed of polygons in a 3D plane. The computer then renders in real time the world allowing you to walk through the world.

Q.4. State two advantages of social networking.

Advantages:

• Education Field: Social networks can be used to improve the education of adults and students since they already have certain influence on the learners. Schools and teachers can take the advantage of social networking abilities to create discussion forums, class blogs and online teaching. Even students can further explore topics that they are interested in by using online social networking since they may have limited resources and time in school.
• Business Field: Many companies use social networks such as Twitter and Facebook to connect with customers and prospective clients. This leads to a golden opportunity for job seekers to learn more about the organization and easily connect with people who work there.

Q.5. What is digital video?

Digital video is an electronic representation of moving visual images (video) in the form of encoded digital data. This is in contrast to analog video, which represents moving visual images with analog signals. Digital video comprises a series of digital images displayed in rapid succession.