What is Text Input Format?
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For a Hadoop job, how will you write a custom partitioner?
Mention what is the next step after mapper or maptask?
Explain the general mapreduce algorithm
What is shuffling in mapreduce?
What is the function of mapreducer partitioner?
How to get the single file as the output from MapReduce Job?
How to optimize MapReduce Job?
What are ‘maps’ and ‘reduces’?
what is the Hadoop MapReduce APIs contract for a key and value class?
Can there be no Reducer?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
When should you use sequencefileinputformat?
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