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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

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

505

How is hadoop different from other data processing tools?

500

What happens in a textinputformat?

490

Can you explain how do ‘map’ and ‘reduce’ work?

488

Can we call vms as pseudos?

501

What do the master class and the output class do?

501

What does job conf class do?

491

What do you know about keyvaluetextinputformat?

466

Define a namenode?

494

Explain the hadoop-core configuration?

514

Explain the benefits of block transfer?

633

Define a task tracker?

477

Define a metadata?

497

Define a daemon?

510

Explain the core components of hadoop?

493

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Un-Answered Questions { Apache Hadoop }

What is NoSQL?

762

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

899

Mention what is the use of Context Object?

543

What are the functionalities of jobtracker?

483

What is the difference between HDFS and NAS ?

1066

What is a Record Reader in hadoop?

801

Give the use of the bootstrap panel.

492

What is the jobtracker?

469

What is the use of combiners in the hadoop framework?

473

Which data storage components are used by hadoop?

486

What is Distributed Cache?

730

What are active and passive "NameNodes"?

1201

Do we need to give a password, even if the key is added in ssh?

526

What is the jobtracker and what it performs in a hadoop cluster?

481

Explain the features of fully distributed mode?

448

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