What is yarn in hadoop?
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Which data storage components are used by hadoop?
Explain how can we change the split size if our commodity hardware has less storage space?
explain Metadata in Namenode?
What is a speculative execution in Apache Hadoop MapReduce?
What if rack 2 and datanode fails?
How does an hadoop application look like or their basic components?
What is rack-aware replica placement policy?
What is Schema on Read and Schema on Write?
What is DistributedCache and its purpose?
what is the default replication factor in HDFS?
What problems have you faced when you are working on Hadoop code?
Input Split & Record Reader and what they do?
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