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?

599

What is Hadoop Map Reduce ?

646

what does the text input format do?

627

What happens when a datanode fails ?

605

In Hadoop, which file controls reporting in Hadoop?

599

how can you debug Hadoop code?

638

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

586

What are the primary phases of a Reducer?

633

how indexing in HDFS is done?

643

What is the role of a MapReduce partitioner?

612

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

621

what job does the conf class do?

611

What is the key- value pair in Hadoop MapReduce?

501

What is InputFormat in Hadoop MapReduce?

466

What are the various InputFormats in Hadoop?

476

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Un-Answered Questions { MapReduce }

how Hadoop is different from other data processing tools?

480

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

478

What is Distributed Cache in the MapReduce Framework?

452

What is SequenceFileInputFormat?

640

What is Output Format in MapReduce?

530

Explain Working of MapReduce?

780

Developing a MapReduce Application?

778

What are the key differences between Pig vs MapReduce?

444

When should you use sequencefileinputformat?

492

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

492

In Hadoop, which file controls reporting in Hadoop?

599

What combiners are and when you should utilize a combiner in a map reduce job?

447

What is the use of InputFormat in MapReduce process?

486

What is Mapper in Hadoop MapReduce?

507

What is the inputsplit in map reduce software?

468

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