Which are the methods in the mapper interface?
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what happens when Hadoop spawned 50 tasks for a job and one of the task failed?
What is optimal size of a file for distributed cache?
What is a Speculative Execution in Hadoop MapReduce?
How many Mappers run for a MapReduce job in Hadoop?
What is Reduce only jobs?
What is the default value of map and reduce max attempts?
What is a mapreduce algorithm?
What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?
what job does the conf class do?
How to set mappers and reducers for MapReduce jobs?
What is SequenceFileInputFormat in Hadoop MapReduce?
What is the difference between HDFS block and input split?
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