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?

525

What are the configuration files in Hadoop?

573

Compare Apache Hadoop and Apache Spark?

474

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

580

Explain how Hadoop cluster hardware planning and provisioning is done?

592

How to create a user in Hadoop?

524

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

518

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

569

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

550

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

632

What is JPS? Why is it used in Hadoop?

576

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

525

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

588

Ideally what should be replication factor in a Hadoop cluster?

550

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

498

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Un-Answered Questions { Hadoop General }

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

505

Explain how Hadoop cluster hardware planning and provisioning is done?

592

Name the most common input formats defined in hadoop?

478

Can you give a detailed overview about the Big Data being generated by Facebook?

475

What are the main components of hadoop?

475

What are some of the characteristics of Hadoop framework?

485

What is Identity reducer?

566

What is a rack?

452

What is High Availability feature in Hadoop2?

475

What are the features of Standalone (local) mode?

641

What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?

494

What is CAP Theorem? What aspects does Hadoop support from this theorem?

517

What is Fault Tolerance?

564

What are the port numbers of namenode?

465

Can I set the number of reducers to zero?

428

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