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what is a Task Tracker in Hadoop?
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What are ‘maps’ and ‘reduces’?
Explain JobConf in MapReduce.
Is reduce-only job possible in Hadoop MapReduce?
What are the four essential parameters of a mapper?
Why MapReduce uses the key-value pair to process the data?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
What is a scarce system resource?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
What is the function of mapreduce partitioner?
What are the benefits of Spark over MapReduce?
What is identity mapper and reducer? In which cases can we use them?
How is mapreduce related to cloud computing?
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