What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?
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What is fsck?
What is LazyOutputFormat in Hadoop?
What is a rack?
Why does one remove or add nodes in a Hadoop cluster frequently?
Explain how can we check whether namenode is working or not?
When and how to create hadoop archive?
What is Disk Balancer in Hadoop?
How can you set an arbitrary number of mappers to be created for a job in Hadoop?
What is difference between secondary namenode, checkpoint namenode & backupnode?
Explain what happens in text format?
What a task tracker is in hadoop?
What is Chain Mapper?
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