What is the best way to copy files between HDFS clusters?
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Is it possible to search for files using wildcards?
For a Hadoop job, how will you write a custom partitioner?
What is shuffling in mapreduce?
Illustrate a simple example of the working of MapReduce.
What is a combiner and where you should use it?
Explain the general mapreduce algorithm
What is a mapreduce algorithm?
What is optimal size of a file for distributed cache?
what is a Task Tracker in Hadoop?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
What is a "reducer" in Hadoop?
What is Reducer in MapReduce?
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