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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

Explain the basic architecture of Hadoop?

746

On what basis name node distribute blocks across the data nodes?

875

Name some companies that use Hadoop?

Airtel,

782

Rack awareness of Namenode?

685

Have you ever used Counters in Hadoop. Give us an example scenario?

840

How is the distance between two nodes defined in Hadoop?

1272

What is speculative execution in Hadoop?

885

How we can change Replication factor when Data is on the fly?

1175

What alternate way does HDFS provides to recover data in case a Namenode

778

What are the problems with Hadoop 1.0?

870

what are the nodes in the Hadoop cluster?

772

What Mapper does?

794

What is your favourite tool in the hadoop ecosystem?

797

What is the function of NodeManager?

753

explain Metadata in Namenode?

717

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Un-Answered Questions { Apache Hadoop }

What is the InputFormat ?

787

Is it necessary to know java to learn hadoop?

471

What are channel selectors?

754

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

836

How can one increase replication factor to a desired value in Hadoop?

901

What is the best hardware configuration to run Hadoop?

1450

What is InputSplit and RecordReader?

746

What is a Record Reader in hadoop?

797

What is HDFS block size and what did you chose in your project?

732

What is Hadoop Custom partitioner ?

836

How many Daemon processes run on a Hadoop system?

928

What is the difference between Hadoop and Traditional RDBMS?

771

What are sink processors?

735

What are the Basics of Hadoop?

767

Explain what is sqoop in Hadoop ?

534

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