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

MapReduce Interview Questions

Questions Answers Views Company eMail

Define Writable data types in Hadoop MapReduce?

472

What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?

504

What is shuffling and sorting in Hadoop MapReduce?

456

Define the Use of MapReduce?

457

Whether the output of mapper or output of partitioner written on local disk?

523

How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?

520

Explain the process of spilling in MapReduce?

440

What is LazyOutputFormat in MapReduce?

500

What is Output Format in MapReduce?

526

Explain the features of Apache Spark because of which it is superior to Apache MapReduce?

446

What are the identity mapper and reducer in MapReduce?

587

How to optimize Hadoop MapReduce Job?

460

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

543

How to change the name of the output file from part-r-00000 in Hadoop MapReduce?

484

Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

457

Post New MapReduce Questions

Un-Answered Questions { MapReduce }

What is the function of mapreduce partitioner?

462

Explain slot in Hadoop Map-Reduce v1?

498

Explain how do ‘map’ and ‘reduce’ work?

438

What is reduce side join in mapreduce?

433

What are the data components used by Hadoop?

550

What platform and Java version is required to run Hadoop?

479

What are the the issues associated with the map and reduce slots based mechanism in mapReduce?

479

It can be possible that a Job has 0 reducers?

744

What is a distributed cache in mapreduce framework?

436

What can be optimum value for Reducer?

689

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

473

what is JobTracker in Hadoop? What are the actions followed by Hadoop?

606

What is the InputSplit in map reduce ?

860

What are the various InputFormats in Hadoop?

474

how can you check whether Namenode is working beside using the jps command?

499

For More Un-Answered { MapReduce } Questions Click Here