Explain the difference between a MapReduce InputSplit and HDFS block?
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What are the disservices of utilizing Apache Spark over Hadoop MapReduce?
What is heartbeat in hdfs? Explain.
What is shuffleing in mapreduce?
What is the input type/format in MapReduce by default?
What is the Job interface in MapReduce framework?
What is a MapReduce Combiner?
A number of combiners can be changed or not in MapReduce?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
Why can aggregation not be done in Mapper in MapReduce?
Does Partitioner run in its own JVM or shares with another process?
What combiners are and when you should use a combiner in a mapreduce job?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
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