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

MapReduce Interview Questions

Questions Answers Views Company eMail

What is MapReduce?

1 1840

What MapReduce framework consists of?

1094

Can we submit the mapreduce job from slave node?

1104

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

913

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

1422

What is Reduce only jobs?

1 1707

What is a IdentityMapper and IdentityReducer in MapReduce ?

943

Explain Working of MapReduce?

968

Write a Mapreduce Program for Character Count ?

1046

how to proceed to write your first mapreducer program?

1342

How to set the number of reducers?

1360

Developing a MapReduce Application?

962

Different ways of debugging a job in MapReduce?

1104

Explain the Reducer's reduce phase?

1051

mapper or reducer?

993

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Un-Answered Questions { MapReduce }

What is an input reader in reference to mapreduce?

620

What can be optimum value for Reducer?

945

Explain what does the conf.setmapper class do?

609

Developing a MapReduce Application?

962

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

768

Write a short note on the disadvantages of mapreduce

598

Define Writable data types in Hadoop MapReduce?

638

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

874

Is it possible to split 100 lines of input as a single split in MapReduce?

962

Is it possible to rename the output file?

788

What is a Distributed Cache in Hadoop?

656

Define the Use of MapReduce?

663

what are the most common input formats defined in Hadoop?

641

Define MapReduce?

687

how JobTracker schedules a task ?

847

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