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

MapReduce Interview Questions

Questions Answers Views Company eMail

Define the purpose of the partition function in mapreduce framework

503

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

456

Explain task granularity

450

Explain the general mapreduce algorithm

455

What is mapper in map reduce?

462

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

439

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

433

Clarify what is shuffling in map reduce?

465

What are the fundamental configurations parameters specified in map reduce?

433

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

440

What are the four essential parameters of a mapper?

465

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

516

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

444

What is the function of mapreduce partitioner?

450

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

430

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Un-Answered Questions { MapReduce }

how Hadoop is different from other data processing tools?

467

How much space will the split occupy in Mapreduce?

494

Name job control options specified by mapreduce.

497

What is the best way to copy files between HDFS clusters?

479

How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

450

What main configuration parameters are specified in mapreduce?

491

When is the reducers are started in a MapReduce job?

689

What is the key- value pair in MapReduce?

530

How to optimize MapReduce Job?

481

What is reduce side join in mapreduce?

428

How many Reducers run for a MapReduce job in Hadoop?

428

What is the need of MapReduce?

435

What is the difference between Reducer and Combiner in Hadoop MapReduce?

476

What is shuffling and sorting in mapreduce?

459

What is mapper in map reduce?

462

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