Define Writable data types in MapReduce?
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Explain how mapreduce works.
what are the most common input formats defined in Hadoop?
How to submit extra files(jars, static files) for MapReduce job during runtime?
What do you understand by the term Straggler ?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
When should you use a reducer?
What is the difference between Hadoop and RDBMS?
Explain InputSplit in Hadoop MapReduce?
What is the fundamental difference between a MapReduce InputSplit and HDFS block?
mapper or reducer?
What is the inputsplit in map reduce software?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
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