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Topic :: MapReduce





MapReduce Interview Questions
Questions Answers Views Company eMail

Explain what does the conf.setMapper Class do in MapReduce?

 652

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

 769

What is a Speculative Execution in Hadoop MapReduce?

 652

Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.

 649

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

 663

What counter in Hadoop MapReduce?

 642

What is SequenceFileInputFormat in Hadoop MapReduce?

 626

How many Mappers run for a MapReduce job in Hadoop?

 610

How many Mappers run for a MapReduce job?

 608

How do Hadoop MapReduce works?

 721

Why Mapper runs in heavy weight process and not in a thread in MapReduce?

 638

How many Reducers run for a MapReduce job?

 688

How to specify more than one directory as input to the MapReduce Job?

 696

How to set the number of mappers to be created in MapReduce?

 637

What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?

 850



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Un-Answered Questions { MapReduce }

What MapReduce framework consists of?

1094

Can we submit the mapreduce job from slave node?

1104

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

Developing a MapReduce Application?

963

Different ways of debugging a job in MapReduce?

1105

What are combiners? When should I use a combiner in my MapReduce Job?

899

How does MapReduce framework view its input internally?

867

What are the steps involved in MapReduce framework?

979

What is the Job interface in MapReduce framework?

906

How to overwrite an existing output file during execution of mapreduce jobs?

1091

What is the core of the job in MapReduce framework?

848

How Pig differs from MapReduce?

797