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How can you add the arbitrary key-value pairs in your mapper?
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Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
What is a combiner and where you should use it?
Is it mandatory to set input and output type/format in MapReduce?
Mention what is the hadoop mapreduce apis contract for a key and value class?
When is it suggested to use a combiner in a MapReduce job?
How to specify more than one directory as input to the MapReduce Job?
What does a split do?
What is the key- value pair in MapReduce?
Explain the differences between a combiner and reducer
how to proceed to write your first mapreducer program?
How can we control particular key should go in a specific reducer?
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