Explain how mapreduce works.
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Clarify what is shuffling in map reduce?
what are the most common input formats defined in Hadoop?
what is a sequence file in Hadoop?
How to set the number of mappers for a MapReduce job?
What are the steps involved in MapReduce framework?
How to set mappers and reducers for Hadoop jobs?
When Namenode is down what happens to job tracker?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
Explain what is shuffling in mapreduce?
Can we submit the mapreduce job from slave node?
Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?
What is the Hadoop MapReduce API contract for a key and value Class?
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