Was it just him or was the Professor rather distracted today? He seemed to be spacing out even though students had greeted him before class. But there wasn't alot time to think about it so the Slytherin listened to the question once class started.

Passwords? "A password is used to keep anything from entering a place unwanted people aren't allowed in. Like the common rooms...or atleast i think all of the houses have passwords..." He said after he raised his arms. "Muggles use passwords with number or words codes they touch" he added because he felt like being smart today...