Question

Which spreads without attaching to a host file?

• A. Virus
• B. Worm
• C. Trojan
• D. Spyware

Hint:

Virus = Needs Host File.
Worm = Self-Replicates Independently.

Answer 1

The Correct Option is B

Concept: Malware refers to malicious software designed to damage systems, steal information, or disrupt operations. Different types of malware behave differently.

Step 1: Understand a Computer Virus. A virus requires a host file or program to spread. It attaches itself to legitimate files and becomes active when those files are executed.

Step 2: Understand a Worm. A worm is a standalone malicious program. It can:

• Replicate itself.

• Spread automatically through networks.

• Infect multiple computers without user intervention.

• Operate without attaching to any host file.

Step 3: Understand Trojans and Spyware. A Trojan disguises itself as legitimate software. Spyware secretly collects information from users. Neither is characterized by self-replication without a host file.

Step 4: Conclusion. Since worms spread independently without attaching themselves to a host program, the correct answer is Worm. Hence, option (B) is correct.