Explain about Hadoop file system and processing framework?
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After increasing the replication level, I still see that data is under replicated. What could be wrong?
Mention how hadoop is different from other data processing tools?
What is a namenode?
Explain Hadoop streaming?
What are some typical functions of Job Tracker?
Name the operating system(s) which are supported for production hadoop deployment?
What are the different commands used to startup and shutdown Hadoop daemons?
How can native libraries be included in yarn jobs?
Explain Data Locality in Hadoop?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
Can you explain the common input formats in hadoop?
Can you explain record reader?
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