How is security achieved in Hadoop?
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What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?
What do you know about yarn?
What is streaming access?
Explain how can you check whether namenode is working beside using the jps command?
What is JPS? Why is it used in Hadoop?
What is structured and unstructured data?
What does the file hadoop-metrics.properties do?
What are the four basic parameters of a mapper?
What is the job tracker role in hadoop?
How to restart NameNode or all the daemons in Hadoop?
Do we need to place 2nd and 3rd data in rack 2 only?
What are 'slaves' and 'masters' in Hadoop?
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