What is safe mode in Hadoop?
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What is keyvaluetextinputformat?
What is Apache Hadoop? Why is Hadoop essential for every Big Data application?
What Mapper does?
Is client the end user in HDFS?
On what basis Namenode will decide which datanode to write on?
Explain the benefits of block transfer?
What is MapFile?
Explain the wordcount implementation via hadoop framework ?
How many instances of tasktracker run on a hadoop cluster?
What is the jobtracker and what it performs in a hadoop cluster?
What are channel selectors?
How can you connect an application
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