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 MapReduce?

673

What happens when a DataNode fails during the write process?

638

Compare RDBMS with Hadoop MapReduce.

629

what is a Task Tracker in Hadoop?

699

what are the most common input formats defined in Hadoop?

642

what daemons run on a master node and slave nodes?

700

What is Text Input Format?

673

what is WebDAV in Hadoop?

730

What platform and Java version is required to run Hadoop?

640

what are the three modes in which Hadoop can be run?

626

How data is spilt in Hadoop?

643

what is storage and compute nodes?

735

When Namenode is down what happens to job tracker?

698

what are the main configuration parameters that user need to specify to run Mapreduce Job ?

601

what is "map" and what is "reducer" in Hadoop?

632

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Un-Answered Questions { MapReduce }

what is NameNode in Hadoop?

877

what is a Task Tracker in Hadoop?

699

Can we rename the output file?

685

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

688

What is the difference between HDFS block and input split?

886

What do you understand by mapreduce?

646

Explain slot in Hadoop Map-Reduce v1?

684

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

650

Can we set the number of reducers to zero in MapReduce?

701

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

664

When is it not recommended to use MapReduce paradigm for large scale data processing?

654

What are the advantages of using mapreduce with hadoop?

590

How many numbers of reducers run in Map-Reduce Job?

609

What is OutputCommitter?

808

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

644

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