What is the key- value pair in Hadoop MapReduce?
what are the main configuration parameters that user need to specify to run Mapreduce Job ?
What is difference between an input split and hdfs block?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
Detail description of the Reducer phases?
How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?
Why MapReduce uses the key-value pair to process the data?
Explain how mapreduce works.
how Hadoop is different from other data processing tools?
How hadoop mapreduce works?
What is the inputsplit in map reduce software?
Is it mandatory to set input and output type/format in MapReduce?
What is Distributed Cache in the MapReduce Framework?
what is "map" and what is "reducer" in Hadoop?
How to get the single file as the output from MapReduce Job?