How is security achieved in Hadoop?
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What is the difference between TextInputFormat and KeyValueInputFormat class?
Explain InputSplit in Hadoop?
When and how to create hadoop archive?
Name the files which are used by the startup and shutdown commands?
What is a combiner in hadoop?
Why we use intwritable instead of int? Why we use longwritable instead of long?
What are the main components of hadoop?
What are the features of Fully-Distributed mode?
What type of data hadoop can handle ?
What is heartbeat in hadoop?
We have already sql then why nosql?
After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
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