What happen on the namenode when a client tries to read a data file?
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What is the difference between an inputsplit and a block?
What are the main components of hadoop?
What are the modes in which Hadoop run?
What is the use of recordreader in hadoop?
How to handle bad records during parsing?
How many maps are there in a particular job?
Is it possible to provide multiple input to Hadoop? If yes then how?
What are the side effects of not running a secondary name node?
What are the Hadoop features extended to its eco-system components ?
Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?
Do we need to place 2nd and 3rd data in rack 2 only?
Explain Erasure Coding in Hadoop?
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