What happen when namenode enters in safemode in hadoop?
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When and how to create hadoop archive?
What is TextInputFormat in Hadoop?
List out some common problems faced by data analyst?
Can you explain edge nodes in hadoop?
What are the modes in which Hadoop run?
Mention what is rack awareness?
What is the default replication factor in Hadoop and how will you change it?
Which modes can Hadoop be run in? List a few features for each mode?
What is the job tracker role in hadoop?
Which port does SSH work on?
What is job tracker in Hadoop?
What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?
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