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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

What is the port number for NameNode

333

What are the benefits of block transfer?

368

How did you debug your Hadoop code ?

744

What will you do when NameNode is down?

423

What is the best hardware configuration to run Hadoop?

808

Should we use RAID in Hadoop or not?

436

How to change Replication Factor For below cases ?

405

What are the basic available commands in Hadoop sqoop ?

384

On What concept the Hadoop framework works?

666

How to write a Custom Key Class?

356

What if rack 2 and datanode fails?

504

How client application interacts with the NameNode?

396

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

419

How the HDFS Blocks are replicated?

380

Explain InputFormat?

369


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Un-Answered Questions { Apache Hadoop }

Does Hadoop requires RAID?

390


What is commodity hardware?

152


What is the default replication factor?

402


What is your favourite tool in the hadoop ecosystem?

405


What is the difference between Apache Hadoop and RDBMS?

156






What is Apache Hadoop YARN?

907


Name some companies that use Hadoop?

414


What is the default block size in hdfs?

431


Explain the wordcount implementation via hadoop framework ?

151


What is cloudera and why it is used?

148


Virtual Box & Ubuntu Installation?

369


Name the examples of some companies that are using hadoop structure?

125


What do you understand from Node redundancy and is it exist in hadoop cluster?

617


Can hbase run without hadoop?

116


Explain the overview of hadoop history breifly?

117