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Explain task granularity
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What is the difference between Hadoop and RDBMS?
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
In Hadoop what is InputSplit?
What is a partitioner and how the user can control which key will go to which reducer?
How to specify more than one directory as input in the Hadoop MapReduce Program?
What is the next step after Mapper or MapTask?
What happens when a DataNode fails during the write process?
Can you tell us how many daemon processes run on a hadoop system?
What are the steps involved in MapReduce framework?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
How can you add the arbitrary key-value pairs in your mapper?
Can there be no Reducer?
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