Lesson 13 Computer Virus
write down a single technical term for the following.
- These are the utility tools used to detect and remove the virus from the computing devices. Anti-virus software
- It is a series of commands that automatically triggers a specific function within a software program. Macro Virus
- A type of computer virus that inserts its malicious code into executable files
on a system. File infector virus - These types of viruses are created with the help of scripting languages such as VB Script, Java Script, etc. Script virus
- The virus can affect both the boot sector and the program files at the same time. Multipartite Virus
Write very short answer to the following questions.
a. Name any three computer viruses.
Write short answer to the following questions.
A macro is a series of commands that automatically triggers a specific function within a software program. A boot sector virus infects the boot sector on hard disk, floppy disk and also bootable media such as CD and DVD. File infector virus is also known as parasitic virus that usually infects memory and executable files. The polymorphic virus duplicates itself by creating usable, albeit slightly modified, copies of itself.
b. What are the types of viruses? List out them.
Ans: The different types of computer viruses are: Macro virus, boot sector virus, File infector virus, Polymorphic virus, multipartite virus, Script virus, Stealth virus, etc.
c. What are the symptoms of virus infections?
Ans: The symptoms of virus infections are:
- Computer will be slow down and does not respond properly.
- Computer will restart itself.
- Unwanted error message appears on the display screen.
- Programs and files may disappear from the computer system.
- Disk and drive may not open properly.
- Antivirus program may not work properly or may disappear from the system.
d. What are the routes of virus transformation?
Ans: Routes of virus transformation are:
- Email attachment and web documents.
- Removable storage devices like pen drive, memory card, etc.
- Fake websites
- Bluetooth, Xender, etc.
e. Define antivirus with some examples.
Ans: Antivirus programs are utility tools used to detect and remove the virus from the computing devices. Some examples of antivirus are: Norton antivirus, Kaspersky antivirus, McAfee antivirus, NOD 32 antivirus, AVG antivirus, Panda antivirus etc.
f. Explain the ways to protect your computer system from the viruses.
Ans: The different ways to protect our computer system from the viruses are:
- Always use antivirus program on your computer system and update it regularly.
- Scan removable storage media with antivirus before using it.
- Use firewall system.
- Do not download unnecessary software and data from the internet.
- Do not open unwanted and junk emails.
- Give priority to use genuine software programs.
Write long answer to the following question.
a. Explain the types of computer viruses.
Ans: The different types of computer viruses are described below.
Macro virus
A macro is a series of commands that automatically triggers a specific function within a software program.
Boot sector virus
A boot sector virus infects the boot sector on hard disk, floppy disk and also bootable media such as CD and DVD.
File infector virus
File infector virus is also known as parasitic virus that usually infects memory and executable files.
Polymorphic virus
The polymorphic virus duplicates itself by creating usable, albeit slightly modified, copies of itself.
Script virus
These types of viruses are created with the help of scripting languages like Java Script, VB script. A script virus usually comes from web page advertisements so it can spread very fast.
Stealth Virus
A computer virus that actively hides itself from the antivirus software and create a copy itself into another location on the drive are known as stealth virus.
(If you have any question from this chapter please comment below)
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