What is a namenode?
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What are the functionalities of jobtracer?
What is Combiner in Hadoop?
How will you write a custom partitioner for a Hadoop job?
How can one check whether NameNode is working or not?
What is tasktracker in hadoop?
What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?
Mention how many inputsplits is made by a hadoop framework?
is there a standard procedure to deploy hadoop?
What are the most common InputFormats in Hadoop?
What kind of hardware is best for hadoop?
How to create the directory when name node is in safe mode?
What is a udf?
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