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Hadoop General Interview Questions
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What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?

 278

What are the configuration files in Hadoop?

 247

Compare Apache Hadoop and Apache Spark?

 227

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

 243

Explain how Hadoop cluster hardware planning and provisioning is done?

 275

How to create a user in Hadoop?

 226

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

 234

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

 291

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

 253

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

 262

What is JPS? Why is it used in Hadoop?

 237

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

 243

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

 240

Ideally what should be replication factor in a Hadoop cluster?

 256

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

 280

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Un-Answered Questions { Hadoop General }

How is the splitting of file invoked in Hadoop framework?

257

How would you restart NameNode?

215

How does job tracker schedule a job for the task tracker?

269

What are the main components in Hadoop Eco-System and what are their functions ?

252

What do you understand by standalone (or local) mode?

230




What is a Backup node in Hadoop?

253

What is difference between secondary namenode, checkpoint namenode & backupnode?

244

Mention what is data cleansing?

232

Explain what is a sequence file in hadoop?

258

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

243

Define a record reader?

226

What are the features of Fully-Distributed mode?

239

Give a brief overview of Hadoop history?

233

Clarify what webdav is in hadoop?

221

What is a Heartbeat in Hadoop?

303

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