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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What is the difference between Job and Task in MapReduce?

657

Compare Pig vs Hive vs Hadoop MapReduce?

722

What is the fundamental difference between a MapReduce InputSplit and HDFS block?

674

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

681

How to get the single file as the output from MapReduce Job?

681

Why is output file name in Hadoop MapReduce part-r-00000?

676

Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?

649

Explain the process of spilling in Hadoop MapReduce?

697

What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?

649

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

691

What are the benefits of Spark over MapReduce?

695

What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

673

Why do we need MapReduce during Pig programming?

711

What is difference between a MapReduce InputSplit and HDFS block

726

What is lineage graph in Apache Spark?

361

Un-Answered Questions { Hadoop }

What are the different data formats supported by apache tajo?

Explain why to use hbase?

166

Explain write ahead log(journaling) in spark?

284

What is Flatten?

600

How can you send some messages in kafka?

543

What is the use of flume in hadoop?

Explain about the core components of a distributed Spark application?

314

How to set up local repository manually?

When the reducers are are started in a mapreduce job?

656

what does the shell commands “Capture” and “Consistency” determines?

113

What are accumulators in spark?

326

Differentiate between the various types of primary keys in cassandra.

What is Rack Awareness? What is its need in Hadoop?

574

Can you explain rack awareness?

477

What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?

895

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