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The need for data replication can arise in various scenarios like ____________

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The need for data replication can arise in various scenarios like ____________

(a) Replication Factor is changed

(b) DataNode goes down

(c) Data Blocks get corrupted

(d) All of the mentioned

This question was posed to me in final exam.

Enquiry is from Introduction to HDFS in section HDFS – Hadoop Distributed File System of Hadoop

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Best answer
Right answer is (d) All of the mentioned

Best explanation: Data is replicated across different DataNodes to ensure a high degree of fault-tolerance.

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