What is Balancer in Hadoop?
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What is the use of context object?
Explain how jobtracker schedules a task?
What are the important modes of hadoop?
Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
What type of data hadoop can handle ?
What is the block size in Hadoop?
What daemons run on master nodes?
Why does one remove or add nodes in a Hadoop cluster frequently?
Mention what daemons run on a master node and slave nodes?
Which scala library is used for functional programming?
How can one check whether NameNode is working or not?
Explain the common input formats in hadoop?
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