What will you do when NameNode is down?
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Does Hadoop requires RAID?
What are different types of filesystem?
How indexing is done in HDFS?
What is the heartbeat used for?
What do you understand from Node redundancy and is it exist in hadoop cluster?
What is your favourite tool in the hadoop ecosystem?
What is the purpose of button groups?
What do you know about sequencefileinputformat?
How the HDFS Blocks are replicated?
Explain Erasure Coding in Apache Hadoop?
How to change from su to cloudera?
How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?
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