What did mean by data-node?
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What happen when namenode enters in safemode in hadoop?
What is check pointing in hadoop?
Explain Data Locality in Hadoop?
Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
What are the tools used in big data?
Mention what is data cleansing?
Is it possible to have hadoop job output in multiple directories? If yes, how?
Name the files which are used by the startup and shutdown commands?
What is streaming in Hadoop?
Can you give some examples of Big Data?
What is meant by streaming access?
Explain the difference between an inputsplit and a block?
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