MapReduce Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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

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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

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