In Cassandra, different consistency levels determine how many replicas must acknowledge a read or write operation. Which of the following statements best distinguishes QUORUM, LOCAL_QUORUM, and EACH_QUORUM in terms of their scope and trade-offs?

Question

Answer

LOCAL_QUORUM provides the strongest consistency, while EACH_QUORUM provides the highest availability.

Answer

QUORUM and LOCAL_QUORUM are equivalent; EACH_QUORUM and ALL both require every replica to respond.

Answer

QUORUM requires acknowledgment from all replicas; LOCAL_QUORUM limits operations to a single replica; EACH_QUORUM waits for all replicas in one data center only.

Answer

QUORUM requires acknowledgment from a majority of replicas across all data centers; LOCAL_QUORUM requires acknowledgment from a majority of replicas within the local data center; EACH_QUORUM requires a quorum from each data center, ensuring global consistency.

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In Cassandra, different consistency levels determine how many replicas must ackn...

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