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 1841

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?

969

Write a Mapreduce Program for Character Count ?

1047

how to proceed to write your first mapreducer program?

1342

How to set the number of reducers?

1361

Developing a MapReduce Application?

963

Different ways of debugging a job in MapReduce?

1105

Explain the Reducer's reduce phase?

1052

mapper or reducer?

994

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Un-Answered Questions { MapReduce }

what are the basic parameters of a Mapper?

812

Explain the process of spilling in Hadoop MapReduce?

631

mapper or reducer?

994

Why can aggregation not be done in Mapper in MapReduce?

607

What comes in Hadoop 2.0 and MapReduce V2 YARN

1002

Explain about the basic parameters of mapper and reducer function

1046

Explain the difference between a MapReduce InputSplit and HDFS block?

656

When is the reducers are started in a MapReduce job?

861

How to set the number of reducers?

1361

what is WebDAV in Hadoop?

730

How is mapreduce related to cloud computing?

658

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

644

Explain what is “map” and what is "reducer" in hadoop?

643

What is the key- value pair in Hadoop MapReduce?

678

What is the core of the job in MapReduce framework?

848

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