Explain Hadoop streaming?
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How would you check whether your NameNode is working or not?
What are input format, input split & record reader and what they do?
Can you explain rack awareness?
Explain what is jobtracker in hadoop? What are the actions followed by hadoop?
After increasing the replication level, I still see that data is under replicated. What could be wrong?
Mention what is the difference between an rdbms and hadoop?
What is Chain Mapper?
What are the Features of Hadoop?
Who are ‘Data Scientists’?
Mention how hadoop is different from other data processing tools?
What is Reducer in Hadoop?
Explain InputSplit in Hadoop?
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