Can we do online transactions(oltp) using hadoop?
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What if a namenode has no data?
What is the communication channel between client and namenode/datanode?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
What are the hadoop's three configuration files?
Which files are used by the startup and shutdown commands?
what is the typical block size of an HDFS block?
Explain the features of pseudo mode?
Explain why the name ‘hadoop’?
Is client the end user in HDFS?
What is the sequencefileinputformat in hadoop?
What happens to a namenode, when job tracker is down?
What is nlineoutputformat?
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