MapReduce Interview Questions
Questions Answers Views Company eMail

Define the purpose of the partition function in mapreduce framework

396

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

354

Explain task granularity

339

Explain the general mapreduce algorithm

343

What is mapper in map reduce?

363

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

329

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

330

Clarify what is shuffling in map reduce?

344

What are the fundamental configurations parameters specified in map reduce?

329

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

343

What are the four essential parameters of a mapper?

353

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

407

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

336

What is the function of mapreduce partitioner?

367

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

333


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Un-Answered Questions { MapReduce }

What is the difference between RDBMS with Hadoop MapReduce?

479


Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?

363


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

399


What is the process of changing the split size if there is limited storage space on Commodity Hardware?

398


Can you tell us how many daemon processes run on a hadoop system?

332






What is the default input type in MapReduce?

377


What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

603


Explain what you understand by speculative execution

342


What happens when a DataNode fails during the write process?

368


How to change a number of mappers running on a slave in MapReduce?

443


what is NameNode in Hadoop?

536


What counter in Hadoop MapReduce?

365


What is partitioner and its usage?

375


Define MapReduce?

412


Explain what is distributed cache in mapreduce framework?

348