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Hadoop Interview Questions
Questions Answers Views Company eMail

How to specify more than one path for storage in Hadoop?

466

What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

551

What is JPS? Why is it used in Hadoop?

491

What is the key difference between NameNode and DataNode in Hadoop?

456

What is Small File Problem in Hadoop? How can it be resolved?

502

Ideally what should be replication factor in a Hadoop cluster?

489

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

445

How often DataNode send heartbeat to NameNode in Hadoop?

510

What is Mapper? How can we compress Mapper output in Hadoop?

474

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

501

What is Erasure Coding in Hadoop?

467

Why do we need Hadoop Archives? How is it created?

524

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

478

What is CAP Theorem? What aspects does Hadoop support from this theorem?

440

Why do we need Hadoop?

496


Un-Answered Questions { Hadoop }

Is the hdfs block size reduced to achieve faster query results?

38


What is the use of paging cqlsh command in Cassandra?

81


How to create RDD?

482


what is SPF?

1475


What are the log files of the presto server?

5


What do you mean by Stream Processing in Kafka?

495


explain Metadata in Namenode?

874


Is a job split into maps?

998


What is Zookeeper Cluster?

5


How will you consume CSV file into the Hive warehouse using built SerDe?

765


How can you debug a pig script?

564


What is flatten in pig?

586


What is the function of Cluster.Builder class in Cassandra?

139


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

638


What is the utility of using Writable Comparable Custom Class in Map Reduce code?

956