What is hadoop? Name the main components of a hadoop application?
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How to handle bad records during parsing?
What is the relationship between Jobs and Tasks in Hadoop?
What are the port numbers of job tracker?
What is TextInputFormat in Hadoop?
Clarify what is sqoop in hadoop?
How does job tracker schedule a job for the task tracker?
What happen on the namenode when a client tries to read a data file?
Explain map-only job?
What are the side effects of not running a secondary name node?
What is the default replication factor in Hadoop and how will you change it?
How job tracker schedules an assignment?
What is the role of the secondary namenode?
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