What is Combiner in Hadoop?
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What does the high availability of a name-node means? How is it accomplished?
Explain what is storage and compute nodes?
Ideally what should be the replication factor in hadoop?
Clarify how job tracker schedules an assignment?
Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?
Compare Hadoop and RDBMS?
Define “speculative execution” in hadoop?
Can you explain commodity hardware?
How can you set an arbitrary number of mappers to be created for a job in Hadoop?
Explain how can you debug hadoop code?
What is the logistic regression?
What happen on the namenode when a client tries to read a data file?
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