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MapReduce Interview Questions
Questions Answers Views Company eMail

Explain the differences between a combiner and reducer

 377

What is a TaskInstance?

 395

What is the default input type in MapReduce?

 383

How does fault tolerance work in mapreduce?

 355

What is a scarce system resource?

 383

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

 361

Write a short note on the disadvantages of mapreduce

 356

Explain what you understand by speculative execution

 350

Explain combiners.

 356

when do reducers play their role in a mapreduce task?

 355

In mapreduce what is a scarce system resource? Explain?

 390

What do you understand by mapreduce?

 369

Explain how mapreduce works.

 359

What is an input reader in reference to mapreduce?

 356

How is mapreduce related to cloud computing?

 342

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Un-Answered Questions { MapReduce }

What is the key- value pair in Hadoop MapReduce?

399

Explain about the partitioning, shuffle and sort phase

384

What counter in Hadoop MapReduce?

374

How data is spilt in Hadoop?

381

Write a Mapreduce Program for Character Count ?

701




What is RecordReader in a Map Reduce?

385

What is the next step after Mapper or MapTask?

381

What is identity mapper and identity reducer?

376

What is a distributed cache in mapreduce framework?

346

Name job control options specified by mapreduce.

419

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

419

Differentiate Reducer and Combiner in Hadoop MapReduce?

405

What are the four essential parameters of a mapper?

362

What are ‘maps’ and ‘reduces’?

363

How to sort intermediate output based on values in MapReduce?

396

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