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 1362

What MapReduce framework consists of?

876

Can we submit the mapreduce job from slave node?

928

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

739

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

1257

What is Reduce only jobs?

1 1209

What is a IdentityMapper and IdentityReducer in MapReduce ?

766

Explain Working of MapReduce?

778

Write a Mapreduce Program for Character Count ?

834

how to proceed to write your first mapreducer program?

1140

How to set the number of reducers?

1185

Developing a MapReduce Application?

778

Different ways of debugging a job in MapReduce?

897

Explain the Reducer's reduce phase?

821

mapper or reducer?

738

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Un-Answered Questions { MapReduce }

Explain the difference between a MapReduce InputSplit and HDFS block?

495

What is the process of changing the split size if there is limited storage space on Commodity Hardware?

515

What is a Distributed Cache in Hadoop?

481

What are ‘reduces’?

519

what job does the conf class do?

610

Is there any point of learning mapreduce, then?

482

Explain the process of spilling in MapReduce?

441

What do you mean by inputformat?

447

What is Output Format in MapReduce?

530

What do you understand by the term Straggler ?

495

How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

561

What combiners are and when you should utilize a combiner in a map reduce job?

446

What is a scarce system resource?

483

What is the difference between RDBMS with Hadoop MapReduce?

632

What is a "reducer" in Hadoop?

631

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