MongoDB is a document-oriented database that stores data in flexible document structures. It can be useful when learning modern application architectures and NoSQL concepts. If your target role involves MongoDB, include at least one demonstrable project rather than mentioning the topic only as a skill. This point is specifically relevant to the MongoDB aspect of MCA study. For this specific question about MongoDB, the practical takeaway is to relate the concept to your own MCA learning goal. In other words, this guidance addresses: Can working professionals learn MongoDB alongside an MCA?