In hadoop_pid_dir, what does pid stands for?
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Can you explain edge nodes in hadoop?
Give me examples of unstructured data?
What happens if you don?t override the mapper methods and keep them as it is?
Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
How to restart NameNode or all the daemons in Hadoop?
Mention what job does the conf class do?
What happen if a datanode loses network connection for a few minutes?
How jobtracker assign tasks to the tasktracker?
Why is Data Block size set to 128 MB in Hadoop?
What is Small File Problem in Hadoop? How can it be resolved?
What are the tools used in big data?
What are input format, input split & record reader and what they do?
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