What are the network requirements for using hadoop?
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Define a metadata?
What do masters consist of?
How to restart Namenode?
How do you define "block" in HDFS?
What is structured data?
Explain why the name ‘hadoop’?
How can you connect an application
How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?
What is the problem with small files in Apache Hadoop?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
How does an hadoop application look like or their basic components?
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