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

650

What is a TaskInstance?

660

What is the default input type in MapReduce?

660

How does fault tolerance work in mapreduce?

624

What is a scarce system resource?

651

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

636

Write a short note on the disadvantages of mapreduce

598

Explain what you understand by speculative execution

603

Explain combiners.

627

when do reducers play their role in a mapreduce task?

614

In mapreduce what is a scarce system resource? Explain?

666

What do you understand by mapreduce?

645

Explain how mapreduce works.

608

What is an input reader in reference to mapreduce?

620

How is mapreduce related to cloud computing?

657

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Un-Answered Questions { MapReduce }

What does conf.setmapper class do?

665

What are the benefits of Spark over MapReduce?

640

What is Shuffling and Sorting in a MapReduce?

658

Explain about the partitioning, shuffle and sort phase in MapReduce?

817

What is the Hadoop MapReduce API contract for a key and value Class?

1290

what is WebDAV in Hadoop?

729

What is RecordReader in a Map Reduce?

643

Mention Hadoop core components?

655

Can MapReduce program be written in any language other than Java?

926

Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?

675

How to specify more than one directory as input in the Hadoop MapReduce Program?

712

What is the InputSplit in map reduce ?

1022

Define Writable data types in MapReduce?

672

MapReduce Types and Formats and Setting up a Hadoop Cluster?

903

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

680

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