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

Hadoop General Interview Questions

Questions Answers Views Company eMail

Which port does SSH work on?

406

Is there another way to check whether Namenode is working?

403

What is the NameNode port number?

400

Give me an example of document database ?

476

What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?

452

What are the four modules that make up the Apache Hadoop framework?

554

How does job tracker schedule a job for the task tracker?

454

What is 'jps'?

424

Explain about Hadoop file system and processing framework?

425

How Hadoop is cost-effective?

415

What does the mapred.job.tracker command do?

426

Is it possible to rename the output file, and if so, how?

463

What are the Hadoop features extended to its eco-system components ?

440

What is job tracker in Hadoop?

500

What sorts of actions does the job tracker process perform?

421

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Un-Answered Questions { Hadoop General }

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

428

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

468

What is High Availability feature in Hadoop2?

440

What is the role of the secondary namenode?

441

How is security achieved in Hadoop?

523

Explain how Hadoop cluster hardware planning and provisioning is done?

556

Does hadoop follows the unix pattern?

427

How to create hadoop archive?

419

Explain what is hadoop?

434

How can we create a hadoop cluster from scratch?

423

Which modes can Hadoop be run in? List a few features for each mode?

469

Can you explain edge nodes in hadoop?

437

How will you write a custom partitioner for a Hadoop job?

455

How can you set an arbitrary number of Reducers to be created for a job in Hadoop?

476

How often do you need to reformat the namenode?

511

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