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Database / Apache Cassandra Interview Questions

Compare Cassandra Vs Relational Databases.

Data may be unstructured. Only structured data.
Flexible schema.Fixed schema.
Data is written in many locations.Data is written in mostly one location.
In Cassandra, a table is a list of "nested key-value pairs". (Row x Column Key x Column value)In RDBMS, a table is an array of arrays. (Row x Column)
Keyspace is the outermost container which contains data corresponding to an application.Database is the outermost container which contains data corresponding to an application.

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