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 1757

What MapReduce framework consists of?

1065

Can we submit the mapreduce job from slave node?

1060

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

872

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

1394

What is Reduce only jobs?

1 1629

What is a IdentityMapper and IdentityReducer in MapReduce ?

913

Explain Working of MapReduce?

928

Write a Mapreduce Program for Character Count ?

1012

how to proceed to write your first mapreducer program?

1314

How to set the number of reducers?

1327

Developing a MapReduce Application?

911

Different ways of debugging a job in MapReduce?

1067

Explain the Reducer's reduce phase?

1017

mapper or reducer?

942

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Un-Answered Questions { MapReduce }

What does a split do?

593

Why can aggregation not be done in Mapper in MapReduce?

589

Define the purpose of the partition function in mapreduce framework

635

What are the various input and output types supported by mapreduce?

577

How is mapreduce related to cloud computing?

616

In MapReduce, ideally how many mappers should be configured on a slave?

624

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

1253

What is a "map" in Hadoop?

752

Explain task granularity

596

Explain the input type/format in mapreduce by default?

558

what is WebDAV in Hadoop?

689

What is the need of key-value pair to process the data in MapReduce?

625

What is an identity mapper and identity reducer?

574

What is the problem with the small file in Hadoop?

613

What do you understand by compute and storage nodes?

652

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