What do you mean by inputformat?
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What are the various input and output types supported by mapreduce?
How to set the number of reducers?
What is difference between a MapReduce InputSplit and HDFS block
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
How to set mappers and reducers for Hadoop jobs?
When is it not recommended to use MapReduce paradigm for large scale data processing?
Explain the Reducer's Sort phase?
When is the reducers are started in a MapReduce job?
What is the relation between MapReduce and Hive?
What is a mapreduce algorithm?
When Namenode is down what happens to job tracker?
What is partitioner and its usage?
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