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In the context of Cassandra, what does a "node" refer to?

A type of database application

A single machine in a Cassandra cluster

In the context of Cassandra, a "node" specifically refers to a single machine within a Cassandra cluster. Each node is an instance of the Cassandra database, and it plays a critical role in storing data and providing fault tolerance. When data is written to Cassandra, it is distributed across multiple nodes to ensure scalability and availability. This distributed nature allows for high performance and reliability, as multiple nodes can handle requests and manage data independently.

Cassandra clusters are designed to work together, where each node can communicate with others to share the workload and data. This architecture enables Cassandra to handle large volumes of data without a single point of failure, making it an excellent choice for applications requiring continuous uptime and scalability. In contrast, the other options do not accurately represent what a node is within the context of Cassandra.

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A method of data visualization

A piece of software for data analysis

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