Topic :: MapReduce





MapReduce Interview Questions
Questions Answers Views Company eMail

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

 384

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

 486

What is a Speculative Execution in Hadoop MapReduce?

 382

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

 391

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

 391

What counter in Hadoop MapReduce?

 385

What is SequenceFileInputFormat in Hadoop MapReduce?

 374

How many Mappers run for a MapReduce job in Hadoop?

 374

How many Mappers run for a MapReduce job?

 361

How do Hadoop MapReduce works?

 427

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

 384

How many Reducers run for a MapReduce job?

 448

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

 442

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

 366

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

 434



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Un-Answered Questions { MapReduce }

What MapReduce framework consists of?

767

Can we submit the mapreduce job from slave node?

846

What is a IdentityMapper and IdentityReducer in MapReduce ?

643

Explain Working of MapReduce?

668

Write a Mapreduce Program for Character Count ?

713




how to proceed to write your first mapreducer program?

1033

Developing a MapReduce Application?

660

Different ways of debugging a job in MapReduce?

807

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

661

How does MapReduce framework view its input internally?

594

What are the steps involved in MapReduce framework?

617

What is the Job interface in MapReduce framework?

647

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

851

What is the core of the job in MapReduce framework?

586

How Pig differs from MapReduce?

570