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Hadoop General Interview Questions
Questions Answers Views Company eMail

Explain what is sequencefileinputformat?

 490

Mention how hadoop is different from other data processing tools?

 446

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

 479

Mention what is rack awareness?

 422

Mention what is the difference between an rdbms and hadoop?

 467

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

 459

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

 652

Explain what is storage and compute nodes?

 543

Explain how jobtracker schedules a task?

 509

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

 475

What happens in text format?

 484

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

 477

Explain what is a task tracker in hadoop?

 500

Explain what is speculative execution?

 458

Explain what happens in text format?

 611

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Un-Answered Questions { Hadoop General }

What is Disk Balancer in Hadoop?

564

What is the number of default partitioner in hadoop?

473

How to handle bad records during parsing?

486

How can you set an arbitrary number of mappers to be created for a job in Hadoop?

496

How to create the directory when name node is in safe mode?

600

Which modes can Hadoop be run in? List a few features for each mode?

502

Can you explain logistic regression?

461

How is the splitting of file invoked in Hadoop ?

569

What are the functionalities of jobtracer?

458

According to IBM, what are the three characteristics of Big Data?

471

Name the most common Input Formats defined in Hadoop? Which one is default?

494

Why is checkpointing important in hadoop?

503

What is a record reader?

448

Explain the usage of Context Object?

517

What are the common types of NOSQL data bases ?

481

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