What is rack-aware replica placement policy?
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What is Schema on Read and Schema on Write?
On what basis data will be stored on a rack?
Define a metadata?
Why is hadoop faster?
Which command is used for the retrieval of the status of daemons running the hadoop cluster?
What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?
What are the most commonly defined input formats in Hadoop?
Is a job split into maps?
Can you explain how do ‘map’ and ‘reduce’ work?
How we can change Replication factor when Data is on the fly?
What is difference between split and block in hadoop?
What is the meaning of speculative execution in Hadoop? Why is it important?
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