Information and Communication Technology || Class 9 Science Notes

ICT

1. Short answer type questions.

a. Name any two devices used in ICT?
→i. Personal computer
ii. smart phone

b. Name the engineers who developed Nepali Sat I'.

→ Abash Maskey and Hari Shrestha are the engineer who developed 'Nepall SAT I'

c.What is telecommunication?
= Telecommunication is the transmission of information over a distance through the use of electronic communication system.

d. What is computer security?
=Computer security is the protection of computer system networks and data from theft, damage or disruption.

2. Long answer type questions.

a. What is ICT? Give some examples of ICT devices.
= The are d digital technologies to to access, process and communicate information. ICT encompasses a wide range of technologies including software hardware and networking system, and used in vurious applications, including education, business, entertainment and communication Some examples of ICT devices are smart phone, laptop, tablets, etc

b. Define email. Write its advantage over postal mail system.
→ Email & a method of sending and receiving digital messages over the internet or other computer networks Email messages can contain text, images, video, and other types of files, and can be sent to une or more recipients at the same time. its advantage over postal mail system are:-

i. Email is delivered very fast, while postal mail can take days or weeks.
ii. Sending email is free of cost, while sending postal mail needs cost.
iii. Email is more envimnmentally-friendly then postal mail.
iv. Email can be sent to multiple person at once, while postal mail can be sent to an individual.

c. What is a search engine? Name any two popular search engines.
= A search engine is a software program that searches a database of internet pages and returns a list of web pages that match a user's search criteria. The two popular search engines are google and yahoo.

d. What is cyberbullying? Write about cyberbullying that you know.
=Any person harassed by another person using the Internet through phones, tablets, laptop computer or any other electronic device is called a cyberbullying Cyberbullying is misaring the information and communication technology. Using the internet, anyone can be threatened to publish one's personal details, send dirty messages to disgrace someone and spread false. news. All these activities come under cyber bullying.

e. What is computer virus? Write some symptoms of competer virus.
= A computer virus is a type of software that is designed to harm computers. It caute various types. of ham to a computer It's symptoms are:
i. Slow computer performance
ii. Securtly warnings
iii. Delete files or folders
iv. Change location of files.
v. Unwanted Storage

f. Define anti-virus. Name some popular anti-virus.
→ An antivirus software is a type of computer program designed to detect, remove virus from. the computer. Some popular anti-virus softwares are: Norton Antivirus, Kaspersky Antivirus, Avast Antivirus, etc.