Artificial Intelligence (417) — CBSE Class 10 board question

(a) Firewall: A firewall is a security system that monitors and controls incoming and outgoing network traffic. It acts as a barrier between a trusted internal network and untrusted external networks to protect the computer from unauthorized access.

(b) Worms: Worms are a type of virus that replicate themselves and spread to all files once they attack a computer. Because they multiply rapidly, they are very difficult to detect and remove.

• Firewall is not directly defined in the source passage, so use standard accepted CBSE definition — examiners expect this term to be defined from general IT knowledge covered in the chapter.
• Worms — copy the key points from the passage: self-replication, spreads to all files, and difficult to remove. These are the exact phrases examiners look for.
• Keep each answer to 1–2 lines for 1 mark each.