anybody have class 8 chapter 3 log on to access in copy with answer please
Answers
Question 1. Write the purpose of search engine. CBSE 2005
Answer: The main purpose of search engine is to help people to find more information in any topic, which user wants.
Question 2. Give the name of any two Websites, which are used as a search engines.
Answer: www.google.com and www.altavista.com
Question 3. What do you understand by uploading a file on Internet? Name software used for it.
Answer: To transfer a file from your computer to a server is called uploading a file on Internet. FTP is the software which is used for it.
Question 4. Distinguish between FTP and Telnet.
Answer: FTP (File Transfer Protocol) facilitates the transfer of files from one point to another while Telnet is a connection protocol that allows a user to connect to a remote server.
Question 5. What do you understand by telnet?
Answer: Telnet is a protocol that facilitates remote login on a computer.
Question 6. What do you understand by downloading files from Internet?
Answer: Downloading is transferring files from a server to a client’s computer.
Question 7. What do you understand by remote login?
Answer: Remote login or remote access is the ability to get access to a computer or a network from a different computer.
Question 8. Give the name of any two Websites which are used to send E-mail.
Answer: www.gmail.com and www.rediffmail.com
Question 9. How can a Word document be sent alongwith an E-mail?
Answer: By attaching the Word file with an E-mail.
Question 10. Write one advantage and one limitation of E-mail over traditional mail.
or
Why is E-mail so popular over conventional mail?
or
Mention any two advantages of E-mail over conventional mail. CBSE 2010, 08, 04,03
Answer:
Advantages
- E-mail is extremely cost effective.
- E-mail takes lesser time for transmitting data than conventional mail.
Disadvantage
- Need of Internet connection to send/receive mail.
Question 11. How can video conferencing be helpful to teachers?
Answer: Using video conferencing, teachers can communicate with different school teachers and students to discuss different topics or attend seminars online.
Question 12. State one advantage of video conferencing over personal face-to-face business meetings.
Answer: Video conferencing allows you to interact with many people face-to-face without being at same place.
Answer:
Supermarkets use computers for storing lists of items, their prices, quantities available and quantities sold. Have you ever wondered how they store, manage and quickly retrieve data about so many products? Your elders can book railway tickets online. Where is the data about trains, their timings and seat allocation stored? How is it that when a person books a ticket, the reserved and the available seats are automatically shown?
If a person is asked to memorise such records, it will be an almost impossible task. To deal with such problems, data is stored and managed in a computer using databases. Thesedays, large amounts of data are required to be stored at all the places such as hotels, hospitals, supermarkets, railway stations, airports and offices. In this chapter, we will learn more about database and its related terminologies.
DATABASE AND DBMS
A database is an organised collection of related data so that it can be easily accessed, managed and updated. A Database Management System (DBMS) is a software program that enables us to create, modify and extract data from a database. DBMS can be based on different data models such as network, hierarchical and relational.
A DBMS based on the relational data model stores data in the form of tables and is called Relational Database Management System (RDBMS). In this chapter, we will learn about Microsoft Access, which is an example of RDBMS. Some other examples of RDBMS Oracle and Microsoft SQL Server.
Explanation: