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?

650

Compare Pig vs Hive vs Hadoop MapReduce?

712

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

667

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

675

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

671

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

670

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

641

Explain the process of spilling in Hadoop MapReduce?

689

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

641

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

688

What are the benefits of Spark over MapReduce?

691

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

667

Why do we need MapReduce during Pig programming?

705

What is difference between a MapReduce InputSplit and HDFS block

722

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

677

Post New MapReduce Questions

Un-Answered Questions { MapReduce }

What is a "map" in Hadoop?

834

What is a "reducer" in Hadoop?

914

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

667

What is SequenceFileInputFormat?

859

What is heartbeat in hdfs?

702

What are the identity mapper and reducer in MapReduce?

835

What is the need of MapReduce?

686

When is it not recommended to use MapReduce paradigm for large scale data processing?

719

What are ‘maps’ and ‘reduces’?

742

How many Mappers run for a MapReduce job?

654

how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

820

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

684

what are the main configuration parameters that user need to specify to run Mapreduce Job ?

649

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

1342

What is MapReduce? What are the syntax you use to run a MapReduce program?

717

For More Un-Answered { MapReduce } Questions Click Here