Describe what happens to a mapreduce job from submission to output?
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What is the difference between HDFS block and input split?
What is the difference between an RDBMS and Hadoop?
what are the main configuration parameters that user need to specify to run Mapreduce Job ?
How do reducers communicate with each other?
What is identity mapper and reducer? In which cases can we use them?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
What is the relation between MapReduce and Hive?
Explain the difference between a MapReduce InputSplit and HDFS block?
How many Reducers run for a MapReduce job?
What is the need of MapReduce?
What are the benefits of Spark over MapReduce?
Why MapReduce uses the key-value pair to process the data?
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