What is KeyValueTextInputFormat in Hadoop?
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Why Hadoop performs replication, although it results in data redundancy?
What jobtracker is in hadoop? What are the activities followed by hadoop?
According to IBM, what are the three characteristics of Big Data?
What are the configuration files in Hadoop?
Which modes can Hadoop be run in? List a few features for each mode?
How NameNode tackle Datanode failures in Hadoop?
What are the port numbers of task tracker?
When and how to create hadoop archive?
How to use combiner in hadoop ?
Explain the Single point of Failure in Hadoop?
After increasing the replication level, I still see that data is under replicated. What could be wrong?
What kind of hardware is best for hadoop?
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