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  1. Categories >> Software >> Big Data >> Hadoop >> Hadoop General
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Hadoop General Interview Questions
Questions Answers Views Company eMail

What are the different commands used to startup and shutdown Hadoop daemons?

 527

What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

 528

How is the splitting of file invoked in Hadoop framework?

 513

Is it possible to provide multiple input to Hadoop? If yes then how?

 502

Is it possible to have hadoop job output in multiple directories? If yes, how?

 452

What is the default replication factor and how will you change it?

 533

Explain Hadoop Archives?

 535

Explain the Single point of Failure in Hadoop?

 477

Explain Erasure Coding in Hadoop?

 503

What is Disk Balancer in Hadoop?

 513

How would you check whether your NameNode is working or not?

 420

Is Namenode machine same as DataNode machine as in terms of hardware?

 461

If DataNode increases, then do we need to upgrade NameNode?

 551

What happens if the number of reducers is 0 in Hadoop?

 481

Why is Data Block size set to 128 MB in Hadoop?

 439

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Un-Answered Questions { Hadoop General }

What is structured and unstructured data?

447

Which database is used in hadoop?

481

Explain Erasure Coding in Hadoop?

503

Explain edge nodes in hadoop?

441

Mention what is rack awareness?

381

Mention how hadoop is different from other data processing tools?

409

Explain how can you check whether namenode is working beside using the jps command?

431

How to use combiner in hadoop ?

445

What is TextInputFormat in Hadoop?

518

Give me an example of document database ?

476

Can you give a detailed overview about the Big Data being generated by Facebook?

432

Specify what the information segments utilized by hadoop are?

438

Can you define udf?

424

What do you know about the speculative execution?

458

What are the important features of hadoop?

444

For More Un-Answered { Hadoop General } Questions Click Here