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MapReduce Interview Questions
Questions Answers Views Company eMail

What is the difference between Job and Task in MapReduce?

 377

Compare Pig vs Hive vs Hadoop MapReduce?

 369

What is the fundamental difference between a MapReduce InputSplit and HDFS block?

 340

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

 388

How to get the single file as the output from MapReduce Job?

 373

Why is output file name in Hadoop MapReduce part-r-00000?

 368

Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?

 351

Explain the process of spilling in Hadoop MapReduce?

 377

What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?

 332

What are the the issues associated with the map and reduce slots based mechanism in mapReduce?

 386

What are the benefits of Spark over MapReduce?

 352

What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

 362

Why do we need MapReduce during Pig programming?

 377

What is difference between a MapReduce InputSplit and HDFS block

 384

What is the job of blend () and repartition () in Map Reduce?

 345

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Un-Answered Questions { MapReduce }

Different ways of debugging a job in MapReduce?

801

What is the fundamental difference between a MapReduce InputSplit and HDFS block?

340

what is storage and compute nodes?

409

It can be possible that a Job has 0 reducers?

630

How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?

416




What is the key- value pair in MapReduce?

384

Illustrate a simple example of the working of MapReduce.

382

What is reduce side join in mapreduce?

328

What do you mean by inputformat?

353

What is a combiner and where you should use it?

354

what is a sequence file in Hadoop?

411

How to create custom key and custom value in MapReduce Job?

355

Explain the input type/format in mapreduce by default?

350

Is it necessary to write a mapreduce job in java?

405

In MapReduce Data Flow, when Combiner is called?

357

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