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MapReduce Interview Questions
Questions Answers Views Company eMail

How is reporting controlled in hadoop?

782

What is Hadoop Map Reduce ?

805

what does the text input format do?

815

What happens when a datanode fails ?

778

In Hadoop, which file controls reporting in Hadoop?

774

how can you debug Hadoop code?

838

For a job in Hadoop, is it possible to change the number of mappers to be created?

786

What are the primary phases of a Reducer?

824

how indexing in HDFS is done?

855

What is the role of a MapReduce partitioner?

806

Is it important for Hadoop MapReduce jobs to be written in Java?

845

what job does the conf class do?

790

What is the key- value pair in Hadoop MapReduce?

679

What is InputFormat in Hadoop MapReduce?

667

What are the various InputFormats in Hadoop?

650


Post New MapReduce Questions

Un-Answered Questions { MapReduce }

Does Partitioner run in its own JVM or shares with another process?

706


Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?

600


how Hadoop is different from other data processing tools?

646


What is MapReduce in Hadoop?

640


What is the use of InputFormat in MapReduce process?

651


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

703


What does a 'MapReduce Partitioner' do?

681


How does fault tolerance work in mapreduce?

625


What is reduce side join in mapreduce?

615


Explain how mapreduce works.

611


What are the advantages of using map side join in mapreduce?

646


What happen if the number of the reducer is 0 in MapReduce?

652


How to specify more than one directory as input in the Hadoop MapReduce Program?

714


What is a Speculative Execution in Hadoop MapReduce?

653


How is mapreduce related to cloud computing?

659