Answer / Prateek Gupta

MongoDB and Cassandra are both NoSQL databases, but they have significant differences in their data models, querying, and use cases.
1. Data Model: MongoDB uses a flexible schema-less JSON-like document model, while Cassandra employs a tabular data model with columns, rows, and partition keys.
2. Querying: MongoDB provides richer querying capabilities compared to Cassandra, including complex queries on the document level and an SQL-like syntax (MongoDB Query Language). In contrast, Cassandra's query language is limited but optimized for high performance with large datasets.
3. Scalability: Both databases scale horizontally, but MongoDB uses sharding as its primary method for scaling, while Cassandra relies on partitioning and replication.

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