What is Rack Awareness? What is its need in Hadoop?
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Have you ever used counters in hadoop?
What are the network requirements for hadoop?
Mention what does the text input format do?
Explain what is storage and compute nodes?
Why slaves limited to 4000 in hadoop version 1?
How NameNode tackle Datanode failures in Hadoop?
What are the primary phases of the reducer?
What happen if one of the datanodes has much slower cpu?
What is Identity reducer?
What are the side data distribution techniques?
How can native libraries be included in yarn jobs?
Mention what is data cleansing?
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