Explain the shuffle?
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What is partioner in hadoop? Where does it run,mapper or reducer?
What are the port numbers of namenode, job tracker and task tracker?
What is a heartbeat in HDFS?
What is the InputFormat ?
What are the default configuration files that are used in hadoop?
How will you make changes to the default configuration files?
Explain what happens in textinformat ?
Should we use RAID in Hadoop or not?
What is Apache Hadoop YARN?
What are the benefits of block transfer?
Explain what is the purpose of RecordReader in Hadoop?
What is Rack Awareness in Apache Hadoop?
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