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What is identity mapper and reducer? In which cases can we use them?
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How to set which framework would be used to run mapreduce program?
What is a IdentityMapper and IdentityReducer in MapReduce ?
What is the difference between RDBMS with Hadoop MapReduce?
Explain about the partitioning, shuffle and sort phase in MapReduce?
Explain what you understand by speculative execution
When Namenode is down what happens to job tracker?
What do you mean by shuffling and sorting in MapReduce?
What is the InputSplit in map reduce ?
How can you add the arbitrary key-value pairs in your mapper?
What is Output Format in MapReduce?
How to write MapReduce Programs?
What is a scarce system resource?
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