Online and offline electronic question and answer system: Quick question

Asian students with conservative behaviors tend to feel embarrassed and reluctant to ask questions in large classrooms. This paper proposed a mobile-compatible web-based question and answer application to address the aforementioned problem. This proposed web application is known as Quick Question (QQ). QQ is designed to allow students to post questions anonymously and rapidly during class hours. QQ can be accessed online from a web hosting server, or offline from a Raspberry Pi without Internet access. QQ can run on multiple platforms with different screen sizes and capable of serving 250 concurrent users while using the Raspberry Pi. QQ also includes a profanity filter that censor bad words with an accuracy of 86.11%. Furthermore, a term extraction and learning mechanism is implemented to help in grouping and sorting questions posted by students in a class.