MapReduce Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

MapReduce Interview Questions

Questions Answers Views Company eMail

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

485

How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

475

What is the relation between MapReduce and Hive?

461

What are advantages of Spark over MapReduce?

456

What is the use of InputFormat in MapReduce process?

486

What is Counter in MapReduce?

450

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

543

How to compress mapper output in Hadoop?

493

Why is Apache Spark faster than Hadoop MapReduce?

471

Define MapReduce?

525

Where is the output of Mapper written in Hadoop?

477

Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

483

Explain the difference between a MapReduce InputSplit and HDFS block?

495

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

444

How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

460

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Un-Answered Questions { MapReduce }

Why is Apache Spark faster than Hadoop MapReduce?

471

Explain what is shuffling in mapreduce?

455

In MapReduce how to change the name of the output file from part-r-00000?

497

What is map/reduce job in hadoop?

463

What happens when the node running the map task fails before the map output has been sent to the reducer?

499

What counter in Hadoop MapReduce?

476

What main configuration parameters are specified in mapreduce?

504

What is a scarce system resource?

483

What are the main configuration parameters in a MapReduce program?

482

What is the inputsplit in map reduce software?

468

What is Distributed Cache in the MapReduce Framework?

452

what is storage and compute nodes?

554

What is Shuffling and Sorting in a MapReduce?

514

What are the various input and output types supported by mapreduce?

469

What is the data storage component used by Hadoop?

462

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