What is Erasure Coding in Hadoop?
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What are the core methods of a Reducer?
What is job tracker in Hadoop?
What jobtracker is in hadoop? What are the activities followed by hadoop?
Explain the common input formats in hadoop?
How to use combiner in hadoop ?
What is difference between reducer and combiner?
What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?
Explain small file problem in hadoop
How many daemon processes run on a hadoop cluster?
What is the procedure for namenode recovery?
What mode(s) can hadoop code be run in?
What is the difference between TextInputFormat and KeyValueInputFormat class?
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