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What do you know by storage and compute node?
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Define a commodity hardware? Does commodity hardware include ram?
Data Engineer Given a list of followers in the format:123, 345234, 678345, 123…Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?
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What is a checkpoint?
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What is your favourite tool in the hadoop ecosystem?
How hdfa differs with nfs?
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What is a Combiner?
Should we use RAID in Hadoop or not?
Explain the difference between NameNode
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