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?

625

Compare Pig vs Hive vs Hadoop MapReduce?

687

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

630

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

645

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

636

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

637

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

609

Explain the process of spilling in Hadoop MapReduce?

647

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

604

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

653

What are the benefits of Spark over MapReduce?

650

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

636

Why do we need MapReduce during Pig programming?

654

What is difference between a MapReduce InputSplit and HDFS block

685

What is lineage graph in Apache Spark?

353

Un-Answered Questions { Hadoop }

Clarify what a task tracker is in hadoop?

435

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

546

When running Spark applications, is it necessary to install Spark on all the nodes of YARN cluster?

332

Explain about the different types of trformations on dstreams?

303

When does queuefullexception occur?

655

What is the use of context object?

472

Clarify what is sqoop in hadoop?

425

Is impala production ready?

What is apache spark good for?

287

On what basis Namenode will decide which datanode to write on?

1272

What do you understand by Pair RDD?

387

How to configure the number of the Combiner in MapReduce?

629

Is bigger than spark driver maxresultsize?

298

How to write a query in Cassandra?

104

After increasing the replication level, I still see that data is under replicated. What could be wrong?

465

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