Have you ever used counters in hadoop?
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What is TextInputFormat in Hadoop?
Is it possible to have hadoop job output in multiple directories?
Why aggregation cannot be done in Mapper?
What are the restriction to the key and value class ?
List of some best tools that can be useful for data-analysis?
Explain how do you overwrite replication factor?
What is a Backup node in Hadoop?
What are the important modes of hadoop?
How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?
Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?
What is the default replication factor in Hadoop and how will you change it?
How would an hadoop administrator deploy various components of hadoop in production?
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