Data structures help students organise information efficiently and are important for writing scalable programs. Arrays, linked lists, stacks, queues, trees, graphs and hash-based structures are common foundations. Students can judge their progress in data structures by solving problems independently instead of depending entirely on guided tutorials. This point is specifically relevant to the data structures aspect of MCA study. For this specific question about data structures, the practical takeaway is to relate the concept to your own MCA learning goal.