What should I know about web application projects before joining an MCA?

A strong MCA project should solve a clear problem and demonstrate real technical work. A student can strengthen it with proper documentation, testing, source control and a working demonstration. The practical value of web application projects becomes clearer when you use it to solve an actual problem instead of studying definitions alone. This point is specifically relevant to the web application projects aspect of MCA study. For this specific question about web application projects, the practical takeaway is to relate the concept to your own MCA learning goal. In other words, this guidance addresses: What should I know about web application projects before joining an MCA?