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What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
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What platform and Java version is required to run Hadoop?
What is streaming?
Explain the Reducer's reduce phase?
What happens when the node running the map task fails before the map output has been sent to the reducer?
What is MapReduce in Hadoop?
How can you add the arbitrary key-value pairs in your mapper?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
How can we control particular key should go in a specific reducer?
Describe what happens to a mapreduce job from submission to output?
What is heartbeat in hdfs? Explain.
How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?
What is Reduce only jobs?
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