What platform and java version are required to run hadoop?
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What is the InputFormat ?
What is Rack awareness?
In which location Name Node stores its Metadata and why?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
How does NameNode tackle DataNode failures?
What is the heartbeat used for?
How does master slave architecture in the hadoop?
What is Row Key?
Define a job tracker?
Explain use cases where SequenceFile class can be a good fit?
What is a block and block scanner in HDFS?
Mention what is the use of Context Object?
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