What is the relationship between Job and Task in Hadoop?
What combiners is and when you should use a combiner in a MapReduce Job?
How to set mappers and reducers for Hadoop jobs?
What are the data components used by Hadoop?
What is the best way to copy files between HDFS clusters?
Is it possible to search for files using wildcards?
In Hadoop what is InputSplit?
What is partitioning in MapReduce?
What is the difference between RDBMS with Hadoop MapReduce?
Explain what does the conf.setMapper Class do in MapReduce?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
What is a Speculative Execution in Hadoop MapReduce?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
In MapReduce, ideally how many mappers should be configured on a slave?
What counter in Hadoop MapReduce?
