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?

489

What are the configuration files in Hadoop?

541

Compare Apache Hadoop and Apache Spark?

445

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

542

Explain how Hadoop cluster hardware planning and provisioning is done?

555

How to create a user in Hadoop?

489

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

480

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

540

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

506

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

587

What is JPS? Why is it used in Hadoop?

527

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

489

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

538

Ideally what should be replication factor in a Hadoop cluster?

518

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

468

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Un-Answered Questions { Hadoop General }

What is JobTracker?

435

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

437

List Hadoop’s three configuration files?

421

Define data cleansing?

402

What are input format, input split & record reader and what they do?

623

What are the modes in which Hadoop run?

504

Is there another way to check whether Namenode is working?

403

How to use combiner in hadoop ?

445

Where are Hadoop’s configuration files located?

507

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

506

Can you explain combiner?

437

Can you explain speculative execution?

418

What are the features of Fully-Distributed mode?

492

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

590

Can you define udf?

424

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