A computer program used to prevent, detect, and remove threats to the system is called what?

• A. Antivirus
• B. Firewall
• C. Intrusion Detection System
• D. Backup Software

Answer: (A)

Protecting a computer from threats by preventing, detecting, and removing malicious software is the job of antivirus software. It runs in the background, scans files and programs, and watches for suspicious behavior. When it finds a match against known malware or detects unusual activity, it can quarantine or delete the threat and repair damage, often with automatic updates to recognize new threats.

Firewalls control network traffic to block unauthorized access to or from the system and aren’t primarily about scanning the entire computer for malware. An Intrusion Detection System monitors for signs of attacks or breaches and alerts administrators, but it doesn’t typically remove threats from the host. Backup software saves copies of data for recovery after an incident, but it doesn’t prevent or detect malware on the system itself.

So the option that best fits preventing, detecting, and removing threats is antivirus.