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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is the port number for NameNode

691

What are the benefits of block transfer?

778

How did you debug your Hadoop code ?

1135

What will you do when NameNode is down?

766

What is the best hardware configuration to run Hadoop?

1456

Should we use RAID in Hadoop or not?

851

How to change Replication Factor For below cases ?

814

What are the basic available commands in Hadoop sqoop ?

797

On What concept the Hadoop framework works?

1010

How to write a Custom Key Class?

776

What if rack 2 and datanode fails?

900

How client application interacts with the NameNode?

783

How is the option in Hadoop to skip the bad records?

778

How the HDFS Blocks are replicated?

787

Explain InputFormat?

835

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Un-Answered Questions { Apache Hadoop }

What are the additional benefits YARN brings in to Hadoop?

745

In which location Name Node stores its Metadata and why?

1190

What is the difference between Apache Hadoop and RDBMS?

553

What exactly is hadoop?

528

what should be the ideal replication factor in hadoop?

486

What are the Basics of Hadoop?

774

Define a combiner?

476

Does Hadoop requires RAID?

775

What is a “Distributed Cache” in Apache Hadoop?

549

What are channel selectors?

765

Virtual Box & Ubuntu Installation?

745

What is the sequencefileinputformat in hadoop?

537

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

838

What will you do when NameNode is down?

766

What is hbase in hadoop?

495

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