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?

569

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

442

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

459

Are job tracker and task trackers present in separate machines?

432

What is namenode?

443

what if job tracker machine is down?

440

What are the four basic parameters of a mapper?

522

In which location name node sores its metadata and why?

643

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

574

How namenode handles data node failures?

497

What is the non dfs used?

509

How can one write custom record reader?

449

Whats the default port that jobtrackers listens ?

443

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

414

Is nosql follow relational db model?

415

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Un-Answered Questions { Hadoop General }

What does the mapred.job.tracker command do?

397

What is the role of the secondary namenode?

409

What is the logistic regression?

402

What happens if number of reducers are 0?

435

What is a commodity hardware? Does commodity hardware include RAM?

491

What is Identity reducer?

473

What is structured and unstructured data?

413

What are the important modes of hadoop?

495

List out some common problems faced by data analyst?

420

Which are the three modes in which hadoop can be run?

414

Explain edge nodes in hadoop?

407

Clarify how ordering in hdfs is finished?

433

Explain what is hadoop?

402

Clarify how job tracker schedules an assignment?

388

What are the common types of NOSQL data bases ?

414

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