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?

412

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?

446

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 }

Explain what is speculative execution?

398

If the hadoop administrator needs to make a change, which configuration file does he need to change?

410

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

423

While starting hadoop services, datanode service is not running?

410

What is the purpose of RecordReader in hadoop?

449

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

656

What is High Availability feature in Hadoop2?

410

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

504

What are the most common OutputFormat in Hadoop?

524

How can native libraries be included in yarn jobs?

444

How to create a user in Hadoop?

446

What is structured and unstructured data?

420

What is TextInputFormat in Hadoop?

484

Are job tracker and task trackers present in separate machines?

442

List of the some best tools that can be useful for data-analysis?

418

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