Explain how do ‘map’ and ‘reduce’ works?
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What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?
How to enable recycle bin or trash in hadoop?
What is safe mode in Hadoop?
What are the important differences between apache and hadoop?
Explain a simple Map/Reduce problem.
What do you know about sequencefileinputformat?
Who invented hadoop?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
Does hadoop always require digital data to process?
What is Hadoop streaming?
What will you do when NameNode is down?
what is SPF?
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