Answer Posted / Ashawni Gautam

Apache Cassandra provides several levels of tunable consistency, including:n1. Strong consistency: All writes are immediately visible to all clients and read-after-write consistency is guaranteed.n2. Eventual consistency (Level One): Writes become visible to all nodes after a variable time, but there's no guarantee of read-after-write consistency.n3. Quorum consistency (Level Two): A majority of replicas must respond with the same value for reads and writes. This level provides strong eventual consistency at a reduced latency compared to Strong consistency.n4. Local consistency: Reads are served from local data without waiting for remote replicas, ensuring lower latency but potentially weaker consistency guarantees.

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