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Define tasktracker.
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What is yarn in hadoop?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
How the HDFS Blocks are replicated?
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How hdfa differs with nfs?
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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Explain the hadoop-core configuration?
what is the typical block size of an HDFS block?
Why the name ‘hadoop’?
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