Cassandra Practice Test

The statement that data is replicated across all nodes in Cassandra accurately describes a fundamental characteristic of the database's architecture. Cassandra is designed as a distributed NoSQL database, where data replication is crucial for ensuring high availability and fault tolerance. When data is written to a node, it is automatically replicated to other nodes based on the defined replication strategy and factor. This means that even if some nodes go down, the data remains accessible from other nodes, reducing the risk of data loss and allowing for read/write operations to continue smoothly.

Additionally, this replication mechanism supports load balancing, as different nodes can handle requests for the same piece of data, optimizing performance. It is a core feature that enables scalability and resilience, making Cassandra suitable for applications requiring high connectivity and uptime.