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 why do we need hadoop?

499

Explain the features of pseudo mode?

530

What do shuffling do?

476

Explain the basic difference between traditional rdbms and hadoop?

496

Explain what if rack 2 and datanode fails?

456

Define a job tracker?

508

Explain the features of fully distributed mode?

447

What are the characteristics of hadoop framework?

489

Explain how can we change the split size if our commodity hardware has less storage space?

483

Explain how is hadoop different from other data processing tools?

546

Define a datanode?

488

Is secondary namenode a substitute to the namenode?

517

What is a secondary namenode?

473

What is unstructured data?

493

Explain the overview of hadoop history breifly?

465

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Un-Answered Questions { Apache Hadoop }

In which location Name Node stores its Metadata and why?

1190

What is Apache Hadoop?

646

What do you know about keyvaluetextinputformat?

466

How can I restart namenode?

534

On what basis data will be stored on a rack?

939

What is the difference between Apache Hadoop and RDBMS?

553

Where is the Mapper Output intermediate kay-value data stored ?

1174

Which command is used for the retrieval of the status of daemons running the hadoop cluster?

511

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

778

Explain the overview of hadoop history breifly?

465

What are sink processors?

741

What are the functionalities of jobtracker?

483

Does the hdfs client decide the input split or namenode?

499

What are active and passive "NameNodes"?

1201

What is hadoop framework?

504

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