What is a RecordReader in Hadoop MapReduce?
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What is the use of InputFormat in MapReduce process?
Can we set the number of reducers to zero in MapReduce?
What happen if the number of the reducer is 0 in MapReduce?
Define speculative execution?
Compare Pig vs Hive vs Hadoop MapReduce?
When should you use a reducer?
What is the key- value pair in MapReduce?
What is a IdentityMapper and IdentityReducer in MapReduce ?
What do you understand by the term Straggler ?
List the network requirements for using Hadoop ?
Explain what are the basic parameters of a mapper?
What is a TaskInstance?