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?

613

Compare Pig vs Hive vs Hadoop MapReduce?

674

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

619

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

634

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

626

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

626

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

599

Explain the process of spilling in Hadoop MapReduce?

631

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

599

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

644

What are the benefits of Spark over MapReduce?

640

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

630

Why do we need MapReduce during Pig programming?

642

What is difference between a MapReduce InputSplit and HDFS block

674

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

637

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Un-Answered Questions { MapReduce }

How to specify more than one directory as input to the MapReduce Job?

696

What are the primary phases of a Reducer?

822

How to optimize MapReduce Job?

648

What is the relation between MapReduce and Hive?

640

What is the use of InputFormat in MapReduce process?

650

What is the Hadoop MapReduce API contract for a key and value Class?

1291

In Hadoop what is InputSplit?

629

how can you check whether Namenode is working beside using the jps command?

663

When should you use a reducer?

629

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

670

When the reducers are are started in a mapreduce job?

593

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

626

Developing a MapReduce Application?

963

What is shuffling and sorting in Hadoop MapReduce?

625

Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.

649

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