What is HDFS block size and what did you chose in your project?
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How hdfa differs with nfs?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
What hadoop does in safe mode?
Is hadoop open source?
What is the meaning of speculative execution in Hadoop? Why is it important?
What is Input Split in hadoop?
Should we use RAID in Hadoop or not?
Can hive run without hadoop?
What are the basic available commands in Hadoop sqoop ?
What will you do when NameNode is down?
What is the heartbeat used for?
What is HDFS - Hadoop Distributed File System?
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