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

MapReduce Interview Questions

Questions Answers Views Company eMail

Where is Mapper output stored?

806

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

727

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

907

What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

847

Is it possible to rename the output file?

739

how JobTracker schedules a task ?

795

what is NameNode in Hadoop?

827

what does the conf.setMapper Class do ?

771

how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

743

What is SequenceFileInputFormat?

773

What is a "map" in Hadoop?

742

What is a "reducer" in Hadoop?

823

what is Speculative Execution?

787

Explain JobConf in MapReduce.

768

What is OutputCommitter?

750

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Un-Answered Questions { MapReduce }

Is there any point of learning mapreduce, then?

609

What is MapReduce? What are the syntax you use to run a MapReduce program?

630

What is a MapReduce Combiner?

748

what is the Hadoop MapReduce APIs contract for a key and value class?

623

what is NameNode in Hadoop?

827

MapReduce Types and Formats and Setting up a Hadoop Cluster?

876

What is the role of a MapReduce partitioner?

771

How many numbers of reducers run in Map-Reduce Job?

564

Is it necessary to write a mapreduce job in java?

591

What is OutputCommitter?

750

In Hadoop what is InputSplit?

590

What are the four essential parameters of a mapper?

605

What is the need of MapReduce?

583

Explain InputSplit in Hadoop MapReduce?

623

What happens if the quantity of the reducer is 0 in mapreduce?

558

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