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?

646

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

526

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

524

Are job tracker and task trackers present in separate machines?

502

What is namenode?

518

what if job tracker machine is down?

511

What are the four basic parameters of a mapper?

614

In which location name node sores its metadata and why?

703

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

662

How namenode handles data node failures?

566

What is the non dfs used?

591

How can one write custom record reader?

523

Whats the default port that jobtrackers listens ?

509

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

485

Is nosql follow relational db model?

502

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Un-Answered Questions { Hadoop General }

How would you restart NameNode?

452

Explain what is a sequence file in hadoop?

513

Explain the common input formats in hadoop?

510

What is partitioning?

500

Name the most common input formats defined in hadoop?

478

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

494

What do you understand by a closure in scala?

519

What is the difference between TextInputFormat and KeyValueInputFormat class?

540

What is the non dfs used?

591

Can you define inputsplit in hadoop?

514

What are the network requirements for hadoop?

520

Can we create a hadoop cluster from scratch?

474

What is distributed copy (distcp)?

520

What is the block size in Hadoop?

470

How Hadoop is cost-effective?

450

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