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

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**Solution:**

1. The **Boot Sector Virus** targets the boot sector of storage devices such as floppy disks or the Master Boot Record (MBR) of hard drives.

2. This virus activates when the system boots from an infected disk, allowing it to gain control before the operating system and most security programs start.

3. Because it loads into memory early, it can cause system boot failures or errors, making it particularly harmful.

4. Other virus types differ in behavior:
   - **Resident Viruses** remain in memory and infect files during execution but do not infect the boot sector.
   - **Direct Action Viruses** act only when the infected file runs and do not affect the MBR.
   - **Macro Viruses** infect documents and templates in applications like MS Word or Excel, not system boot areas.

5. Although less common today due to modern UEFI systems, Boot Sector Viruses historically posed a significant threat and are important to understand.

**Answer:** Boot Sector Virus

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