Files on which of the following devices are not effected by Virus ?

Correct option is D

Files on a CD-ROM are not affected by viruses because a CD-ROM is a read-only memory device. Once data is written onto the CD-ROM, it cannot be altered or infected by any virus. This makes CD-ROMs a safe storage medium for critical or unalterable data.

Important Key Points:

1. A CD-ROM (Compact Disc Read-Only Memory) cannot be written to or modified, making it immune to virus infections.
2. Viruses primarily infect devices or storage media that allow read and write operations, such as USB drives, memory cards, and hard disks.
3. Optical discs like CD-ROMs are often used for distributing software and data securely.

Knowledge Booster:

• USB Port: Not a storage device itself, but viruses can infect files on USB storage devices.
• Memory Card: A writable storage device that can be infected by viruses if connected to an infected system.
• Hard Disk: Writable storage that is highly vulnerable to viruses due to its frequent use for storing files and running programs.
• CD-R and CD-RW: Unlike CD-ROM, these writable versions of CDs can be infected if connected to an infected system before finalization.
• Use of CD-ROMs: Commonly used for software distribution, system backups, and storing critical data due to their immunity to malware.