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

MapReduce Interview Questions

Questions Answers Views Company eMail

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

644

How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

624

What is the relation between MapReduce and Hive?

640

What are advantages of Spark over MapReduce?

690

What is the use of InputFormat in MapReduce process?

650

What is Counter in MapReduce?

675

What is the difference between a MapReduce InputSplit and HDFS block?

751

How to compress mapper output in Hadoop?

674

Why is Apache Spark faster than Hadoop MapReduce?

655

Define MapReduce?

688

Where is the output of Mapper written in Hadoop?

771

Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

676

Explain the difference between a MapReduce InputSplit and HDFS block?

656

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

601

How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

602

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Un-Answered Questions { MapReduce }

Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

676

How to set which framework would be used to run mapreduce program?

683

What do you understand by compute and storage nodes?

680

How many InputSplits is made by a Hadoop Framework?

642

List out Hadoop's three configuration files?

602

What is the default value of map and reduce max attempts?

930

How hadoop mapreduce works?

639

How to configure the number of the Combiner in MapReduce?

624

Mention Hadoop core components?

656

Is reduce-only job possible in Hadoop MapReduce?

696

What is a Speculative Execution in Hadoop MapReduce?

652

Name job control options specified by mapreduce.

705

how Hadoop is different from other data processing tools?

645

When the reducers are are started in a mapreduce job?

593

Define Writable data types in Hadoop MapReduce?

638

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