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?

681

What does conf.setmapper class do?

667

What are ‘maps’ and ‘reduces’?

696

What does a split do?

621

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Un-Answered Questions { MapReduce }

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

600

what happens when Hadoop spawned 50 tasks for a job and one of the task failed?

691

What is the purpose of textinputformat?

704

Where sorting is done on mapper node or reducer node in MapReduce?

673

Why Hadoop MapReduce?

665

Differentiate Reducer and Combiner in Hadoop MapReduce?

680

What is SequenceFileInputFormat in Hadoop MapReduce?

627

What is a IdentityMapper and IdentityReducer in MapReduce ?

945

What is the use of InputFormat in MapReduce process?

651

what happens in textinformat ?

667

Explain what is “map” and what is "reducer" in hadoop?

644

Explain the features of Apache Spark because of which it is superior to Apache MapReduce?

618

What is the difference between Hadoop and RDBMS?

632

Difference between mapreduce and spark

684

What are the steps involved in MapReduce framework?

980

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