Define data cleansing?
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Why do we need Hadoop Archives? How is it created?
Explain Hadoop streaming?
How to use combiner in hadoop ?
Clarify what is sequence file input format?
What are the Features of Hadoop?
How many datanodes can run on a single Hadoop cluster?
How can you set an arbitrary number of Reducers to be created for a job in Hadoop?
What is streaming access?
What is the role of the secondary namenode?
What is the difference between a hadoop database and relational database?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
Clarify how job tracker schedules an assignment?
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