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There are _________ types of read requests that a coordinator can send to a replica.

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There are _________ types of read requests that a coordinator can send to a replica.

(a) two

(b) three

(c) four

(d) all of the mentioned

The question was asked in quiz.

I would like to ask this question from Cassandra with Hadoop in chapter ZooKeeper, Sqoop and Cassandra of Hadoop

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Right choice is (b) three

The explanation is: The coordinator node contacts one replica node with a direct read request.

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