What happens in a textinputformat?
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How would you tackle counting words in several text documents?
What is a block and block scanner in HDFS?
Which are the three main hdfs-site.xml properties?
Is fs.mapr.working.dir a single directory?
What is a Task instance in Hadoop? Where does it run?1
What hadoop does in safe mode?
What are the port numbers of namenode, job tracker and task tracker?
What is Input Split in hadoop?
What are the basic available commands in Hadoop sqoop ?
Is a job split into maps?
Explain the features of stand alone (local) mode?
Is it necessary to write jobs for hadoop in the java language?
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