What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
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What are the functionalities of jobtracker?
What is zookeeper in hadoop?
How the HDFS Blocks are replicated?
How blocks are distributed among all data nodes for a particular chunk of data?
What is the function of NodeManager?
Name some companies that use Hadoop?
Explain what if rack 2 and datanode fails?
What are the modes in which Apache Hadoop run?
What is the difference between a Hadoop and Relational Database and Nosql?
Where do you specify the Mapper Implementation?
Who is a 'user' in HDFS?
What are the important differences between apache and hadoop?
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