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

Hadoop General Interview Questions

Questions Answers Views Company eMail

If datanodes increase, then do we need to upgrade namenode?

513

Which object can be used to get the progress of a particular job

515

Give me examples of unstructured data?

523

Explain the core methods of the reducer?

542

How to handle bad records during parsing?

485

What is the use of context object?

504

What happens if number of reducers are 0?

507

What are the primary phases of the reducer?

487

what is next step after mapper or maptask?

455

What is a rack?

455

Do we require two servers for the namenode and the datanodes?

554

We have already sql then why nosql?

467

What is difference between reducer and combiner?

609

What do you understand by standalone (or local) mode?

473

What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?

471

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Un-Answered Questions { Hadoop General }

What is the non dfs used?

591

Tell me some major benefits of Hadoop?

450

Can you explain the common input formats in hadoop?

566

Can we deploy job tracker other than name node?

717

What is the relationship between Jobs and Tasks in Hadoop?

650

Clarify how ordering in hdfs is finished?

528

Give me an example of document database ?

529

Why would nosql be better than using a sql database? And how much better is it?

518

What are the four basic parameters of a mapper?

613

What is the best practice to deploy the secondary name node?

486

What are the port numbers of task tracker?

488

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

493

Does hadoop follows the unix pattern?

471

What is winutils hadoop?

463

What is 'jps'?

466

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