What is the problem with small files in Hadoop?
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Explain Hadoop streaming?
How can we create a hadoop cluster from scratch?
Can you give some examples of Big Data?
How often DataNode send heartbeat to NameNode in Hadoop?
What are the parameters of mappers and reducers?
Explain how jobtracker schedules a task?
Clarify what is sqoop in hadoop?
Can you explain sequence file in hadoop?
Explain how can we check whether namenode is working or not?
What are the features of Pseudo mode?
Explain the common input formats in hadoop?
When and how to create hadoop archive?
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