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

MapReduce Interview Questions

Questions Answers Views Company eMail

Explain the differences between a combiner and reducer

605

What is a TaskInstance?

629

What is the default input type in MapReduce?

617

How does fault tolerance work in mapreduce?

580

What is a scarce system resource?

610

With the help of two examples name the map and reduce function purpose

586

Write a short note on the disadvantages of mapreduce

559

Explain what you understand by speculative execution

559

Explain combiners.

586

when do reducers play their role in a mapreduce task?

582

In mapreduce what is a scarce system resource? Explain?

618

What do you understand by mapreduce?

594

Explain how mapreduce works.

569

What is an input reader in reference to mapreduce?

585

How is mapreduce related to cloud computing?

605

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Un-Answered Questions { MapReduce }

How data is spilt in Hadoop?

616

It can be possible that a Job has 0 reducers?

928

What are the main configuration parameters in a MapReduce program?

595

Is it mandatory to set input and output type/format in MapReduce?

674

When should you use a reducer?

587

What is heartbeat in hdfs?

613

Name job control options specified by mapreduce.

664

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

566

What is mapreduce algorithm?

552

Compare RDBMS with Hadoop MapReduce.

585

Can we rename the output file?

636

Explain what you understand by speculative execution

559

What is mapper in map reduce?

597

What is the difference between Job and Task in MapReduce?

575

What is Combiner in MapReduce?

593

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