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 1748

What MapReduce framework consists of?

1057

Can we submit the mapreduce job from slave node?

1050

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

861

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

1385

What is Reduce only jobs?

1 1619

What is a IdentityMapper and IdentityReducer in MapReduce ?

899

Explain Working of MapReduce?

920

Write a Mapreduce Program for Character Count ?

1004

how to proceed to write your first mapreducer program?

1303

How to set the number of reducers?

1315

Developing a MapReduce Application?

899

Different ways of debugging a job in MapReduce?

1059

Explain the Reducer's reduce phase?

1011

mapper or reducer?

935

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Un-Answered Questions { MapReduce }

What platform and Java version is required to run Hadoop?

600

what does the text input format do?

769

What do you know about nlineinputformat?

638

What is the difference between HDFS block and input split?

845

When should you use sequencefileinputformat?

612

How to specify more than one directory as input in the Hadoop MapReduce Program?

663

How to change a number of mappers running on a slave in MapReduce?

753

What is MapReduce? What are the syntax you use to run a MapReduce program?

630

Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

577

A number of combiners can be changed or not in MapReduce?

595

What is the use of InputFormat in MapReduce process?

614

Why Mapreduce output written in local disk?

954

What is a Speculative Execution in Hadoop MapReduce?

617

What is shuffleing in mapreduce?

598

How to configure the number of the Combiner in MapReduce?

591

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