Which of the following is not a source of the virus entering your system?

Correct option is B

Among the given options, Printouts are not a source of computer viruses. Computer viruses are malicious software programs that spread through digital media or data transfer methods such as USB drives, email attachments, or infected hard drives. Printouts, being physical copies of documents (paper-based), cannot carry or transmit digital code; hence, they pose no threat of virus infection.
Important Key Points:
1. Virus Definition: A computer virus is a malicious program that can replicate itself and spread to other files or systems.
2. Common Sources: USB drives, CDs/DVDs, external hard drives, internet downloads, and email attachments.
3. Prevention Methods: Installing antivirus software, avoiding unverified downloads, and scanning removable media.
4. Physical Media: Printouts or photographs are non-digital and cannot carry executable code.
5. Security Tip: Always keep system firewalls active and update antivirus definitions regularly.
Knowledge Booster:
· (a) Pen Drive: Commonly used for file sharing and often transmits viruses when connected to infected systems.
· (c) Email Attachment: One of the most frequent sources of malware; attackers disguise viruses in email files.
· (d) Hard Disk: If transferred from an infected computer, it can carry viruses or malicious scripts.
· Modern cybersecurity systems use real-time scanning and sandboxing techniques to detect malicious content before it executes.