What projects can I build around ABC ID during 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. A good MCA study plan should leave time for both the theory behind ABC ID and regular implementation practice. This point is specifically relevant to the ABC ID aspect of MCA study. For this specific question about ABC ID, the practical takeaway is to relate the concept to your own MCA learning goal.