Topic :: MapReduce





MapReduce Interview Questions
Questions Answers Views Company eMail

What is Reducer in MapReduce?

 412

How many Reducers run for a MapReduce job in Hadoop?

 352

What is MapReduce in Hadoop?

 365

Why Hadoop MapReduce?

 376

Why can aggregation not be done in Mapper in MapReduce?

 367

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

 409

What is MapReduce? What are the syntax you use to run a MapReduce program?

 386

What happen if the number of the reducer is 0 in MapReduce?

 379

What is the need of key-value pair to process the data in MapReduce?

 376

What are the main configuration parameters in a MapReduce program?

 392

What do you mean by shuffling and sorting in MapReduce?

 416

What is Combiner in MapReduce?

 368

Where sorting is done in Hadoop MapReduce Job?

 390

What are the configuration parameters in the 'MapReduce' program?

 399

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

 498



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Un-Answered Questions { MapReduce }

What MapReduce framework consists of?

765

Can we submit the mapreduce job from slave node?

844

What is a IdentityMapper and IdentityReducer in MapReduce ?

636

Explain Working of MapReduce?

664

Write a Mapreduce Program for Character Count ?

709




how to proceed to write your first mapreducer program?

1028

Developing a MapReduce Application?

656

Different ways of debugging a job in MapReduce?

802

What are combiners? When should I use a combiner in my MapReduce Job?

655

How does MapReduce framework view its input internally?

590

What are the steps involved in MapReduce framework?

611

What is the Job interface in MapReduce framework?

644

How to overwrite an existing output file during execution of mapreduce jobs?

843

What is the core of the job in MapReduce framework?

580

How Pig differs from MapReduce?

566