Define a sequence file in hadoop?
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How many datanodes can run on a single Hadoop cluster?
How does job tracker schedule a job for the task tracker?
What do you think about the speculative execution?
What does the high availability of a name-node means?
What are the important modes of hadoop?
Can you explain edge nodes in hadoop?
What is JPS? Why is it used in Hadoop?
Do we need to place 2nd and 3rd data in rack 2 only?
What is Reducer in Hadoop?
Explain the usage of Context Object?
How can one write custom record reader?
Explain the common input formats in hadoop?
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