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

MapReduce Interview Questions

Questions Answers Views Company eMail

What is the difference between Job and Task in MapReduce?

578

Compare Pig vs Hive vs Hadoop MapReduce?

629

What is the fundamental difference between a MapReduce InputSplit and HDFS block?

586

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

602

How to get the single file as the output from MapReduce Job?

593

Why is output file name in Hadoop MapReduce part-r-00000?

576

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

557

Explain the process of spilling in Hadoop MapReduce?

586

What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?

565

What are the the issues associated with the map and reduce slots based mechanism in mapReduce?

602

What are the benefits of Spark over MapReduce?

581

What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

585

Why do we need MapReduce during Pig programming?

606

What is difference between a MapReduce InputSplit and HDFS block

635

What is the job of blend () and repartition () in Map Reduce?

600

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Un-Answered Questions { MapReduce }

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

669

What is the use of InputFormat in MapReduce process?

618

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

633

Explain slot in Hadoop Map-Reduce v1?

636

How do you stop a running job gracefully?

567

Name job control options specified by mapreduce.

666

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

576

When is it suggested to use a combiner in a MapReduce job?

588

When is the reducers are started in a MapReduce job?

828

What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

585

How to change a number of mappers running on a slave in MapReduce?

756

Mention Hadoop core components?

616

Can you tell us how many daemon processes run on a hadoop system?

551

Compare Pig vs Hive vs Hadoop MapReduce?

629

What is the default input type in MapReduce?

620

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