Explain the basic architecture of Hadoop?
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How is HDFS fault tolerant?
How many maximum jvm can run on a slave node?
Should we use RAID in Hadoop or not?
How the Client communicates with HDFS?
Explain how is hadoop different from other data processing tools?
What is HDFS Federation?
What are the functions of NameNode?
Is a job split into maps?
How we can take Hadoop out of Safe Mode?
What is a speculative execution in Apache Hadoop MapReduce?
What is the jobtracker and what it performs in a hadoop cluster?
Main Components of Hadoop?