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?

606

How do reducers communicate with each other?

601

How does inputsplit in mapreduce determines the record boundaries correctly?

606

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

619

What main configuration parameters are specified in mapreduce?

636

How do you stop a running job gracefully?

564

Is it necessary to write a mapreduce job in java?

591

What is shuffling and sorting in mapreduce?

604

What is the function of mapreducer partitioner?

561

What is partitioner and its usage?

629

Is there any point of learning mapreduce, then?

609

What is streaming?

625

What does conf.setmapper class do?

617

What are ‘maps’ and ‘reduces’?

656

What does a split do?

581

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Un-Answered Questions { MapReduce }

What is the difference between Reducer and Combiner in Hadoop MapReduce?

624

What is Text Input Format?

627

How is mapreduce related to cloud computing?

606

How to write MapReduce Programs?

653

A number of combiners can be changed or not in MapReduce?

596

Why Mapreduce output written in local disk?

955

What are the steps involved in MapReduce framework?

932

What is the problem with the small file in Hadoop?

607

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

907

Define MapReduce?

647

how can you check whether Namenode is working beside using the jps command?

630

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

728

Explain about the partitioning, shuffle and sort phase

630

what job does the conf class do?

744

What does a 'MapReduce Partitioner' do?

638

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