What is MapReduce in Hadoop?

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More MapReduce Interview Questions

Map reduce jobs take too long. What can be done to improve the performance of the cluster?

What are the four basic parameters of a reducer?

For a Hadoop job, how will you write a custom partitioner?

What is the default input type in MapReduce?

Explain the process of spilling in MapReduce?

What is the default value of map and reduce max attempts?

Where the mapper's intermediate data will be stored?

Explain slot in Hadoop Map-Reduce v1?

What do you mean by shuffling and sorting in MapReduce?

What do sorting and shuffling do?

Can we set the number of reducers to zero in MapReduce?

What is difference between an input split and hdfs block?

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