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?

520

What happens when a DataNode fails during the write process?

476

Compare RDBMS with Hadoop MapReduce.

457

what is a Task Tracker in Hadoop?

487

what are the most common input formats defined in Hadoop?

457

what daemons run on a master node and slave nodes?

523

What is Text Input Format?

474

what is WebDAV in Hadoop?

553

What platform and Java version is required to run Hadoop?

479

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

457

How data is spilt in Hadoop?

480

what is storage and compute nodes?

552

When Namenode is down what happens to job tracker?

523

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

458

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

461

Post New MapReduce Questions

Un-Answered Questions { MapReduce }

Where the mapper's intermediate data will be stored?

475

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

504

How much space will the split occupy in Mapreduce?

504

Define the Use of MapReduce?

457

How to set the number of mappers to be created in MapReduce?

466

What is Combiner in MapReduce?

473

MapReduce Types and Formats and Setting up a Hadoop Cluster?

721

What is a TaskInstance?

499

How to submit extra files(jars, static files) for MapReduce job during runtime?

502

what are the most common input formats defined in Hadoop?

457

What main configuration parameters are specified in mapreduce?

502

What is the difference between an RDBMS and Hadoop?

498

What do you know about nlineinputformat?

503

What are advantages of Spark over MapReduce?

449

Why MapReduce uses the key-value pair to process the data?

447

For More Un-Answered { MapReduce } Questions Click Here