Define a combiner?
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Explain the use of .mecia class?
What is a secondary namenode?
Explain use cases where SequenceFile class can be a good fit?
Explain the features of fully distributed mode?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
How Mapper is instantiated in a running job?
What is the difference between SQL and NoSQL?
Explain how can we change the split size if our commodity hardware has less storage space?
Explain what if rack 2 and datanode fails?
How to enable trash/recycle bin in hadoop?
How to restart Namenode?
What is difference between split and block in hadoop?
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