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What is a scarce system resource?
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Mention what is the hadoop mapreduce apis contract for a key and value class?
What are the benefits of Spark over MapReduce?
what is Speculative Execution?
Why can aggregation not be done in Mapper in MapReduce?
How many times combiner is called on a mapper node in Hadoop?
It can be possible that a Job has 0 reducers?
How can we control particular key should go in a specific reducer?
Compare RDBMS with Hadoop MapReduce.
Can MapReduce program be written in any language other than Java?
How many Reducers run for a MapReduce job?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
What is the default value of map and reduce max attempts?
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