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Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
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Explain what you understand by speculative execution
What is a Distributed Cache in Hadoop?
When should you use a reducer?
Explain the differences between a combiner and reducer
What is the inputsplit in map reduce software?
What is Shuffling and Sorting in a MapReduce?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
What is mapper in map reduce?
What is MapReduce? What are the syntax you use to run a MapReduce program?
when do reducers play their role in a mapreduce task?
For a Hadoop job, how will you write a custom partitioner?
Explain slot in Hadoop Map-Reduce v1?
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