What is HDFS ? How it is different from traditional file systems?
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What is Derby database?
What is HDFS High Availability?
How indexing is done in HDFS?
Explain the features of stand alone (local) mode?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
Explain why do we need hadoop?
Which are the three main hdfs-site.xml properties?
What is the Use of SSH in Hadoop ?
What is the port number for NameNode
What is safe mode in Hadoop?
Explain what if rack 2 and datanode fails?
What do you mean by taskinstance?
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