MapReduce Interview Questions
Questions Answers Views Company eMail

What is MapReduce?

1 1128

What MapReduce framework consists of?

765

Can we submit the mapreduce job from slave node?

844

How can we control particular key should go in a specific reducer?

643

How can you add the arbitrary key-value pairs in your mapper?

991

What is Reduce only jobs?

1 968

What is a IdentityMapper and IdentityReducer in MapReduce ?

636

Explain Working of MapReduce?

665

Write a Mapreduce Program for Character Count ?

710

how to proceed to write your first mapreducer program?

1029

How to set the number of reducers?

1037

Developing a MapReduce Application?

657

Different ways of debugging a job in MapReduce?

803

Explain the Reducer's reduce phase?

705

mapper or reducer?

627


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Un-Answered Questions { MapReduce }

what is NameNode in Hadoop?

548


With the help of two examples name the map and reduce function purpose

369


Compare Pig vs Hive vs Hadoop MapReduce?

370


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

616


Developing a MapReduce Application?

657






What is a distributed cache in mapreduce framework?

353


Map reduce jobs take too long. What can be done to improve the performance of the cluster?

389


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

369


What is heartbeat in hdfs?

402


Detail description of the Reducer phases?

583


Define the purpose of the partition function in mapreduce framework

417


Why is Apache Spark faster than Hadoop MapReduce?

372


What are the fundamental configurations parameters specified in map reduce?

346


What is sqoop in Hadoop ?

405


When should you use sequencefileinputformat?

391