Question

write about different viruses in computer and their defination (in 100 words)​

Answer 1

COMMON TYPES OF COMPUTER VIRUSES

1. RESIDENT VIRUS

Resident viruses set up shop in your RAM and meddle with your system operations. They’re so sneaky that they can even attach themselves to your anti-virus software files.

2. MULTIPARTITE VIRUS

This virus infects the entire system. Multipartite viruses spread by performing unauthorized actions on your operating system, folders, and programs.

3. DIRECT ACTION

This virus targets a specific file type, most commonly executable files (.exe), by replicating and infecting files. Due to its targeted nature, this virus type is one of the easier ones to detect and remove.

4. BROWSER HIJACKER

Easily detected, this virus type infects your browser and redirects you to malicious websites.

5. OVERWRITE VIRUS

Like the name implies, overwrite viruses overwrite file content to infect entire folders, files, and programs.

6. WEB SCRIPTING VIRUS

This sneaky virus disguises itself in the coding of links, ads, images, videos, and site code. It can infect systems when users download malicious files or visit malicious websites.

7. FILE INFECTOR

By targeting executable files (.exe), file infector viruses slow down programs and damage system files when a user runs them.

8. NETWORK VIRUS

Network viruses travel through network connections and replicate themselves through shared resources.

9. BOOT SECTOR VIRUS

One of the easier viruses to avoid, this virus hides out in a file on a USB drive or email attachment. When activated, it can infect the system’s master boot record to damage the system.

Answer 2

Answer:

Boot Sector Virus,Direct Action Virus,Resident Virus,Overwrite Virus,Polymorphic Virus,File Infector Virus, Spacefiller Virus,Macro Virus

Explanation:

Types of Computer Virus

Types of Computer VirusDiscussed below are the different types of computer viruses:

• Boot Sector Virus – It is a type of virus that infects the boot sector of floppy disks or the Master Boot Record (MBR) of hard disks. The Boot sector comprises all the files which are required to start the Operating system of the computer. The virus either overwrites the existing program or copies itself to another part of the disk.

• Direct Action Virus – When a virus attaches itself directly to a .exe or .com file and enters the device while its execution is called a Direct Action Virus. If it gets installed in the memory, it keeps itself hidden. It is also known as Non-Resident Virus.

• Resident Virus – A virus which saves itself in the memory of the computer and then infects other files and programs when its originating program is no longer working. This virus can easily infect other files because it is hidden in the memory and is hard to be removed from the system.

• Multiparty Virus – A virus which can attack both, the boot sector and the executable files of an already infected computer is called a multipartite virus. If a multipartite virus attacks your system, you are at a risk of cyber threat.

• Overwrite Virus – One of the most harmful viruses, the overwrite virus can completely remove the existing program and replace it with the malicious code by overwriting it. Gradually it can completely replace the host’s programming code with the harmful code.

• Polymorphic Virus – Spread through spam and infected websites, the polymorphic virus are file infectors which are complex and are tough to detect. They create a modified or morphed version of the existing program and infect the system and retain the original code.

• File Infector Virus – As the name suggests, it first infects a single file and then later spreads itself to other executable files and programs. The main source of this virus are games and word processors.

• Spacefiller Virus – It is a rare type of virus which fills in the empty spaces of a file with viruses. It is known as cavity virus. It will neither affect the size of the file nor can be detected easily.

• Macro Virus – A virus written in the same macro language as used in the software program and infects the computer if a word processor file is opened. Mainly the source of such viruses are via emails.
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