Name the operating system(s) which are supported for production hadoop deployment?
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Is Namenode machine same as DataNode machine as in terms of hardware?
Is there another way to check whether Namenode is working?
Explain the core methods of the reducer?
What is check pointing in hadoop?
Give me the examples of Columnar database ?
Is it possible to have hadoop job output in multiple directories? If yes, how?
How often do you need to reformat the namenode?
List out the different stream grouping in apache storm?
What are the four modules that make up the Apache Hadoop framework?
What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?
What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?
How would you restart NameNode?
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