Chapter 9 Societal Impacts of IT Solutions
Question - 1 : - Define virus.
Answer - 1 : - A virus is a harmful program, which on entering a computer, starts creating copies of itself. It then attacks by corrupting the executable files and folders saved on the computer.
Question - 2 : - List the different types of computer viruses.
Answer - 2 : -
- File system viruses
- Boot sector viruses
- Macro viruses
Question - 3 : - Name some forms of virus attacks.
Answer - 3 : - Worms, Trojan horse, Computer Virus etc.
Question - 4 : - Give some examples of computer worms.
Answer - 4 : - MS-Blaster, Mellisa worm, SQL Slammer worm are the common examples of worms.
Question - 5 : - What is used to identify, prevent and take action against malicious programs, such as viruses and worms, by deactivating or deleting them?
Answer - 5 : - Antivirus is used to identify, prevent and take action against malicious programs such as viruses and worms, by deactivating or deleting them.
Question - 6 : - What are the types of data backup?
Answer - 6 : -
There are two types of data backup:
- Full backup
- Differential backup
Answer - 7 : - Encryption refers to scrambling of data in some encoded format so that it may be transmitted over networks.
Question - 8 : - Give any two shortcomings of online purchase.
Answer - 8 : -
- Cannot see the product in reality before a purchase.
- You do not receive the product immediately, there is always some delay.
Question - 9 : - How does a virus affect your computer?
Answer - 9 : - Virus is a software used to infect a computer. After virus code is written, it is buried within an essential programmed. Once the programmed is executed, the virus code is activated and attack copies itself to other programs.
Question - 10 : - Give three guidelines to prevent the virus attack.
Answer - 10 : -
Three guidelines to prevent the virus attack are as follows:
- Avoid the temptation to open unexpected E-mail attachments and downloads from unreliable sources. Resist the urge to double click everything in your mailbox. If you get an unexpected file attachment, send an enquiry E-mail to its sender. Ask him about the nature and function of the file attachment.
- In stable reliable antivirus, scanning software and download its updates regularly.
- Scan files downloaded from the Internet or other external sources.