What problems have you faced when you are working on Hadoop code?
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How to resolve small file problem in hdfs?
what is SPF?
Define a task tracker?
How the HDFS Blocks are replicated?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?
What is the difference between rdbms and hadoop?
what is a datanode?
What do you know about nlineoutputformat?
what is the default replication factor in HDFS?
What Mapper does?
What is the port number for NameNode
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