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 are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?

461

What are the configuration files in Hadoop?

504

Compare Apache Hadoop and Apache Spark?

415

What are the different modes in which we can configure/install Hadoop?

504

Explain how Hadoop cluster hardware planning and provisioning is done?

507

How to create a user in Hadoop?

447

What are the major differences between Hadoop 2 and Hadoop 3?

448

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

515

How to specify more than one path for storage in Hadoop?

466

What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

548

What is JPS? Why is it used in Hadoop?

489

What is the key difference between NameNode and DataNode in Hadoop?

456

What is Small File Problem in Hadoop? How can it be resolved?

500

Ideally what should be replication factor in a Hadoop cluster?

489

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

445

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Un-Answered Questions { Hadoop General }

How jobtracker assign tasks to the tasktracker?

380

What are some of the characteristics of Hadoop framework?

411

Is it possible to have hadoop job output in multiple directories? If yes, how?

428

How to create hadoop archive?

391

What is check pointing in hadoop?

405

Explain how do you overwrite replication factor?

413

Define a record reader?

372

What are the primary phases of the reducer?

433

Explain the common input formats in hadoop?

446

What sorts of actions does the job tracker process perform?

386

Explain the usage of Context Object?

442

What is a Backup node in Hadoop?

509

What is Rack Awareness? What is its need in Hadoop?

501

What is the default replication factor and how will you change it?

491

What are 'slaves' and 'masters' in Hadoop?

384

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