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?

464

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

470

Give me examples of unstructured data?

479

Explain the core methods of the reducer?

511

How to handle bad records during parsing?

452

What is the use of context object?

466

What happens if number of reducers are 0?

470

What are the primary phases of the reducer?

459

what is next step after mapper or maptask?

428

What is a rack?

419

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

527

We have already sql then why nosql?

421

What is difference between reducer and combiner?

564

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

428

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

433

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Un-Answered Questions { Hadoop General }

What does jps command do in Hadoop?

651

What does the high availability of a name-node means?

427

Can you explain edge nodes in hadoop?

437

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

428

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

428

How many datanodes can run on a single Hadoop cluster?

452

Give me the examples of Columnar database ?

584

How namenode handles data node failures?

524

Explain small file problem in hadoop

421

Clarify what webdav is in hadoop?

471

What happen if a datanode loses network connection for a few minutes?

589

Explain the core methods of the reducer?

511

Why does one remove or add nodes in a Hadoop cluster frequently?

694

Which directory does hadoop install to?

485

What is tasktracker in hadoop?

429

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