Information systems is a useful area to understand in an MCA because it connects academic knowledge with practical technology work. Students should learn the concept, practise it through small exercises and then apply it in a project. A good MCA study plan should leave time for both the theory behind information systems and regular implementation practice. This point is specifically relevant to the information systems aspect of MCA study. For this specific question about information systems, the practical takeaway is to relate the concept to your own MCA learning goal.