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

Hadoop General Interview Questions

Questions Answers Views Company eMail

What is pseudo-distributed mode?

606

When we send a data to a node, do we allow settling in time, before sending another data to that node?

490

Can we write map reduce program in other than java programming language. How?

503

Are job tracker and task trackers present in separate machines?

462

What is namenode?

483

what if job tracker machine is down?

475

What are the four basic parameters of a mapper?

567

In which location name node sores its metadata and why?

672

What are input format, input split & record reader and what they do?

624

How namenode handles data node failures?

525

What is the non dfs used?

555

How can one write custom record reader?

488

Whats the default port that jobtrackers listens ?

479

Do we need to place 2nd and 3rd data in rack 2 only?

443

Is nosql follow relational db model?

467

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Un-Answered Questions { Hadoop General }

How to debug Hadoop code?

538

What happen if one of the datanodes has much slower cpu?

431

Which operating system(s) are supported for production hadoop deployment?

428

What do you understand by unit and ()in scala?

494

How to create a user in Hadoop?

489

What is difference between reducer and combiner?

564

What mode(s) can hadoop code be run in?

459

What happen on the namenode when a client tries to read a data file?

461

How Hadoop is cost-effective?

415

What does rack awareness algorithm means?

490

Doesn’t google have its very own version of dfs?

481

How many InputSplits will be made by hadoop framework?

492

Explain what is webdav in hadoop?

508

Explain the Single point of Failure in Hadoop?

477

Explain small file problem in hadoop

421

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