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

MapReduce Interview Questions

Questions Answers Views Company eMail

Define the purpose of the partition function in mapreduce framework

637

What are the various input and output types supported by mapreduce?

577

Explain task granularity

598

Explain the general mapreduce algorithm

611

What is mapper in map reduce?

609

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

564

Clarify what combiners are and when you should utilize a combiner in a map reduce job?

571

Clarify what is shuffling in map reduce?

608

What are the fundamental configurations parameters specified in map reduce?

581

What combiners are and when you should utilize a combiner in a map reduce job?

573

What are the four essential parameters of a mapper?

615

Mention what is the hadoop mapreduce apis contract for a key and value class?

644

Explain what combiners are and when you should use a combiner in a mapreduce job?

583

What is the function of mapreduce partitioner?

604

What combiners are and when you should use a combiner in a mapreduce job?

570

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Un-Answered Questions { MapReduce }

When is the reducers are started in a MapReduce job?

835

How to set the number of mappers for a MapReduce job?

661

What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

594

What do sorting and shuffling do?

652

What is the function of mapreducer partitioner?

573

What can be optimum value for Reducer?

916

How to write a custom partitioner for a Hadoop MapReduce job?

612

Clarify what is shuffling in map reduce?

608

What is the Job interface in MapReduce framework?

876

What counter in Hadoop MapReduce?

610

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

572

How to optimize MapReduce Job?

626

How can you add the arbitrary key-value pairs in your mapper?

1396

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

662

Difference between mapreduce and spark

657

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