Question

A program that neither replicates or copies itself, but does damage or compromises the security of the computer. Which 'Computer Virus' is it ?

• A. Joke Program
• B. Worm
• C. Trojan
• D. Hoax

Hint:

- Virus: Replicates by attaching itself to a host file.
- Worm: Replicates independently across networks without needing a host file.
- Trojan: Does not replicate; spreads by disguising itself as legitimate software.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Malicious software (malware) comprises various programs designed to damage or exploit computer systems.
These programs are classified based on their replication, activation, and payload delivery behaviors.

Step 2: Detailed Explanation:
Let us analyze each of the malicious or simulated programs listed in the options:
- Trojan (or Trojan Horse):
A Trojan is a malicious program that misleads users by disguised as a legitimate, harmless utility or application (such as a free game or a system optimizer).
Once executed by the user, it runs its payload to steal data, corrupt files, or create a backdoor for attackers.
Crucially, Trojans do not replicate or copy themselves to other files or computers, relying entirely on social engineering to spread.
Thus, the description matches a Trojan.
- Worm:
A worm is a standalone malware program that actively replicates itself over computer networks to infect other machines without requiring any human action or a host file.
- Joke Program:
These are harmless programs designed to mock or annoy users (such as shaking the screen or opening the disc drive) but do not cause actual harm or compromise system security.
- Hoax (Virus Hoax):
An email or message warning of a non-existent computer virus, often tricking users into deleting essential system files under the guise of security.

Step 3: Final Answer:
The program described is a Trojan (Option C).