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

MapReduce Interview Questions

Questions Answers Views Company eMail

List the network requirements for using Hadoop ?

626

What is the next step after Mapper or MapTask?

641

What are the main components of MapReduce Job?

679

What is the relationship between Job and Task in Hadoop?

661

What combiners is and when you should use a combiner in a MapReduce Job?

623

How to set mappers and reducers for Hadoop jobs?

612

What are the data components used by Hadoop?

737

What is the best way to copy files between HDFS clusters?

667

Is it possible to search for files using wildcards?

641

In Hadoop what is InputSplit?

629

What is partitioning in MapReduce?

716

What is the difference between RDBMS with Hadoop MapReduce?

797

Explain what does the conf.setMapper Class do in MapReduce?

652

How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?

769

What is a Speculative Execution in Hadoop MapReduce?

652

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Un-Answered Questions { MapReduce }

What is mapreduce algorithm?

587

How to set mappers and reducers for MapReduce jobs?

634

What is a mapreduce algorithm?

636

What is the Job interface in MapReduce framework?

906

How to optimize MapReduce Job?

648

What is the difference between Hadoop and RDBMS?

631

What are the four basic parameters of a reducer?

652

what are the three modes in which Hadoop can be run?

626

Which are the methods in the mapper interface?

633

What is identity mapper and chain mapper?

668

What combiners are and when you should use a combiner in a mapreduce job?

597

What is the need of MapReduce?

631

What do sorting and shuffling do?

696

What is shuffling and sorting in Hadoop MapReduce?

625

What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

875

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