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MapReduce Interview Questions
Questions Answers Views Company eMail

Where is Mapper output stored?

 499

what is JobTracker in Hadoop? What are the actions followed by Hadoop?

 516

Is it possible to split 100 lines of input as a single split in MapReduce?

 586

What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

 606

Is it possible to rename the output file?

 491

how JobTracker schedules a task ?

 532

what is NameNode in Hadoop?

 542

what does the conf.setMapper Class do ?

 530

how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

 459

What is SequenceFileInputFormat?

 524

What is a "map" in Hadoop?

 496

What is a "reducer" in Hadoop?

 532

what is Speculative Execution?

 522

Explain JobConf in MapReduce.

 517

What is OutputCommitter?

 502

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Un-Answered Questions { MapReduce }

What is InputFormat in Hadoop MapReduce?

357

What are the fundamental configurations parameters specified in map reduce?

333

How do ‘map’ and ‘reduce’ work?

346

what are the three modes in which Hadoop can be run?

357

Where the mapper's intermediate data will be stored?

339




Define MapReduce?

420

List the network requirements for using Hadoop ?

362

What does a split do?

356

What are the data components used by Hadoop?

420

What is the inputsplit in map reduce software?

368

What is a IdentityMapper and IdentityReducer in MapReduce ?

629

What do sorting and shuffling do?

392

What combiners is and when you should use a combiner in a MapReduce Job?

365

What is a Speculative Execution in Hadoop MapReduce?

367

What are the various configuration parameters required to run a mapreduce job?

362

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