How analysis of Big Data is useful for organizations?
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What does rack awareness mean?
What is CAP Theorem? What aspects does Hadoop support from this theorem?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
How can we create a hadoop cluster from scratch?
What is active and passive NameNode in Hadoop?
What is the relationship between Jobs and Tasks in Hadoop?
Explain map-only job?
Why does one remove or add nodes in a Hadoop cluster frequently?
What is the default replication factor in Hadoop and how will you change it?
What happens if number of reducers are 0?
What is the difference between TextinputFormat and KeyValueTextInputFormat class?
How often do you need to reformat the namenode?
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