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

MapReduce Interview Questions

Questions Answers Views Company eMail

What is difference between an input split and hdfs block?

656

How do reducers communicate with each other?

667

How does inputsplit in mapreduce determines the record boundaries correctly?

647

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

656

What main configuration parameters are specified in mapreduce?

676

How do you stop a running job gracefully?

605

Is it necessary to write a mapreduce job in java?

627

What is shuffling and sorting in mapreduce?

642

What is the function of mapreducer partitioner?

616

What is partitioner and its usage?

689

Is there any point of learning mapreduce, then?

646

What is streaming?

682

What does conf.setmapper class do?

667

What are ‘maps’ and ‘reduces’?

696

What does a split do?

622

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Un-Answered Questions { MapReduce }

What is a partitioner and how the user can control which key will go to which reducer?

939

Developing a MapReduce Application?

966

Why is Apache Spark faster than Hadoop MapReduce?

656

What is the next step after Mapper or MapTask?

644

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

600

Is it possible to rename the output file?

791

How to specify more than one directory as input in the Hadoop MapReduce Program?

714

What is the difference between HDFS block and input split?

887

what are the basic parameters of a Mapper?

813

What is mapreduce algorithm?

588

How to optimize Hadoop MapReduce Job?

632

What is sqoop in Hadoop ?

684

How many InputSplits is made by a Hadoop Framework?

645

What is the core of the job in MapReduce framework?

850

What is difference between an input split and hdfs block?

656

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