What is a scarce system resource?
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When should you use a reducer?
How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?
Explain the difference between a MapReduce InputSplit and HDFS block?
Is reduce-only job possible in Hadoop MapReduce?
Explain how do ‘map’ and ‘reduce’ work?
What are the various configuration parameters required to run a mapreduce job?
Describe what happens to a mapreduce job from submission to output?
Clarify what combiners are and when you should utilize a combiner in a map reduce job?
What is Text Input Format?
What is Combiner in MapReduce?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
When is it not recommended to use MapReduce paradigm for large scale data processing?
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