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

MapReduce Interview Questions

Questions Answers Views Company eMail

List the network requirements for using Hadoop ?

585

What is the next step after Mapper or MapTask?

594

What are the main components of MapReduce Job?

636

What is the relationship between Job and Task in Hadoop?

616

What combiners is and when you should use a combiner in a MapReduce Job?

579

How to set mappers and reducers for Hadoop jobs?

563

What are the data components used by Hadoop?

700

What is the best way to copy files between HDFS clusters?

630

Is it possible to search for files using wildcards?

600

In Hadoop what is InputSplit?

589

What is partitioning in MapReduce?

664

What is the difference between RDBMS with Hadoop MapReduce?

761

Explain what does the conf.setMapper Class do in MapReduce?

600

How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?

716

What is a Speculative Execution in Hadoop MapReduce?

618

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Un-Answered Questions { MapReduce }

Is it important for Hadoop MapReduce jobs to be written in Java?

776

What are the various InputFormats in Hadoop?

609

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

641

Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

578

What is the key- value pair in MapReduce?

724

What is the inputsplit in map reduce software?

582

List out Hadoop's three configuration files?

553

How to submit extra files(jars, static files) for MapReduce job during runtime?

635

How many Mappers run for a MapReduce job?

563

Explain what you understand by speculative execution

559

What are ‘reduces’?

663

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

595

What is MapReduce in Hadoop?

598

What is the difference between Job and Task in MapReduce?

575

Explain about the basic parameters of mapper and reducer function

1008

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