Which type of virus infects the boot sector of floppy disks or the Master Boot Record (MBR) of hard disks?

Correct option is C

The Boot Sector Virus is specifically designed to infect the boot sector of storage devices such as floppy disks or the Master Boot Record (MBR) of hard disks. These viruses execute when the system is booted from an infected disk, allowing them to take control before most security software can even start. They are among the most dangerous types because they load into memory before the operating system.
Important Key Points:
1. The boot sector is the first sector of a storage device containing code for booting the system.
2. Boot Sector Viruses activate when the computer starts, even before the OS loads.
3. These viruses can prevent the system from booting or cause system errors.
4. They usually spread through bootable media like old floppy disks or infected USB drives.
5. Removing such viruses often requires a bootable antivirus tool or formatting the drive.
Knowledge Booster:
· Resident Viruses stay in memory and infect files as they are opened, but do not target the boot sector.
· Direct Action Viruses operate only when the infected file is executed and don’t affect the MBR.
· Macro Viruses infect documents and templates in programs like MS Word and Excel, not system areas.
· Boot Sector Viruses have become less common with modern systems using UEFI, but still represent a historical threat worth knowing.