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Hadoop General Interview Questions
Questions Answers Views Company eMail

Explain what is sequencefileinputformat?

 410

Mention how hadoop is different from other data processing tools?

 374

Mention what are the most common input formats defined in hadoop?

 411

Mention what is rack awareness?

 356

Mention what is the difference between an rdbms and hadoop?

 386

Mention what are the three modes in which hadoop can be run?

 388

Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?

 577

Explain what is storage and compute nodes?

 474

Explain how jobtracker schedules a task?

 426

Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

 397

What happens in text format?

 414

Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

 403

Explain what is a task tracker in hadoop?

 391

Explain what is speculative execution?

 388

Explain what happens in text format?

 525

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Un-Answered Questions { Hadoop General }

What is winutils hadoop?

395

What do you think about the speculative execution?

399

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

410

What are the features of Pseudo mode?

457

Clarify what is sequence file input format?

487

Have you ever used counters in hadoop?

394

What does rack awareness algorithm means and why is it utilized as a part of hadoop?

383

Explain what is namenode in hadoop?

401

What is JPS? Why is it used in Hadoop?

476

What is Identity reducer?

473

Explain the key benefits of using storm for real time processing?

386

What is Distributed Cache in Hadoop?

412

Can you explain sequence file in hadoop?

375

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

515

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

439

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