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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?

 351

What are the configuration files in Hadoop?

 313

Compare Apache Hadoop and Apache Spark?

 288

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

 332

Explain how Hadoop cluster hardware planning and provisioning is done?

 352

How to create a user in Hadoop?

 286

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

 297

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

 384

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

 324

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

 348

What is JPS? Why is it used in Hadoop?

 302

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

 306

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

 334

Ideally what should be replication factor in a Hadoop cluster?

 329

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

 329

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Un-Answered Questions { Hadoop General }

what is next step after mapper or maptask?

298

Can we change the file cached by distributed cache

295

How many job tracker processes can run on a single Hadoop cluster?

317

What are the primary phases of the reducer?

312

What is Federation?

301




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

437

Which language is more suitable for text analytics? R or python?

323

What happen when namenode enters in safemode in hadoop?

298

What is check pointing in hadoop?

309

Name the most common input formats defined in hadoop?

307

Define a udf?

300

What is the logistic regression?

301

Where are Hadoop’s configuration files located?

307

Give me the examples of Columnar database ?

334

What is the job tracker role in hadoop?

289

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