What is Text Input Format?
What is identity mapper and reducer? In which cases can we use them?
What is Shuffling and Sorting in a MapReduce?
When the reducers are are started in a mapreduce job?
Whether the output of mapper or output of partitioner written on local disk?
What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?
What is Hadoop Map Reduce ?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
What is shuffling and sorting in mapreduce?
Where is Mapper output stored?
What is difference between a MapReduce InputSplit and HDFS block
Compare Pig vs Hive vs Hadoop MapReduce?
What is the difference between a MapReduce InputSplit and HDFS block?