what are the nodes in the Hadoop cluster?
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What is the function of NodeManager?
Explain the basic architecture of Hadoop?
Explain the use of tasktracker in the hadoop cluster?
How is security achieved in Apache Hadoop?
Why is Apache Spark faster than Apache Hadoop?
How the Client communicates with HDFS?
Is hadoop based on google mapreduce?
How does NameNode tackle DataNode failures?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
Explain why do we need hadoop?
What is the use of Combiner?
What is small file problem in hadoop?
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