What if a namenode has no data?
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What are the port numbers of namenode, job tracker and task tracker?
How does a namenode handle the failure of the data nodes?
What happens to job tracker when namenode is down?
What is output format in hadoop?
Does Hadoop requires RAID?
Is fs.mapr.working.dir a single directory?
What does the command mapred.job.tracker do?
How many JVMs run on a slave node?
What is your favourite tool in the hadoop ecosystem?
How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?
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