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When does Cassandra require a node to be connected in a full network partition?

When it needs to access all nodes

Never, as nodes can operate independently

Cassandra is designed with a distributed architecture that allows nodes to operate independently, even in the event of a network partition. This characteristic stems from its eventual consistency model and decentralized nature. When a network partition occurs, nodes can still handle read and write operations to some extent, as they do not require a direct connection to all other nodes in the cluster to process requests.

This is in contrast to traditional relational databases, which typically require strong consistency and may not function correctly if parts of the network become unreachable. Instead, Cassandra’s architecture allows nodes to continue to serve client requests and synchronize data once connectivity is restored. Therefore, the independence of nodes during a full network partition underlines the correct answer, as Cassandra does not mandate that nodes remain connected at all times to perform operations.

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Only for read operations

Only when the data is being written

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