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?

453

What are the configuration files in Hadoop?

492

Compare Apache Hadoop and Apache Spark?

404

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

497

Explain how Hadoop cluster hardware planning and provisioning is done?

501

How to create a user in Hadoop?

437

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

444

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

505

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

458

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

543

What is JPS? Why is it used in Hadoop?

475

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

449

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

490

Ideally what should be replication factor in a Hadoop cluster?

476

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

439

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Un-Answered Questions { Hadoop General }

How would an hadoop administrator deploy various components of hadoop in production?

386

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

427

What is the procedure for namenode recovery?

395

what happens when namenode goes down during file read operation in hadoop?

554

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

551

What is High Availability feature in Hadoop2?

405

Can you define a checkpoint?

431

Can you define udf?

395

Explain the Single point of Failure in Hadoop?

437

Can you explain record reader?

399

What are some typical functions of job tracker in hadoop?

390

What are the hadoop configuration files at present?

425

What is meant by streaming access?

499

After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?

436

How does hadoop achieve fault tolerance?

369

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