Why do the nodes are removed and added frequently in a hadoop cluster?
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Explain the difference between an inputsplit and a block?
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 does jps command do in Hadoop?
How does job tracker schedule a job for the task tracker?
How can we create a hadoop cluster from scratch?
What are the most common OutputFormat in Hadoop?
Do we need to place 2nd and 3rd data in rack 2 only?
What are the four modules that make up the Apache Hadoop framework?
What is Erasure Coding in Hadoop?
What does the mapred.job.tracker command do?
What is a udf?
Ideally what should be the replication factor in hadoop?
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