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Hadoop General Interview Questions
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What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

 261

Which directory does hadoop install to?

 264

Why use hadoop?

 236

What are the actions followed by hadoop?

 236

What kind of hardware is best for hadoop?

 225

Where are hadoop’s configuration files located and list them?

 220

How jobtracker assign tasks to the tasktracker?

 230

What are the functionalities of jobtracer?

 231

What does rack awareness mean?

 214

What the information segments utilized by hadoop are?

 225

Clarify what a task tracker is in hadoop?

 229

How ordering in hdfs is finished?

 231

Clarify what is sequence file input format?

 267

How job tracker schedules an assignment?

 219

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

 251

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Un-Answered Questions { Hadoop General }

Which modes can Hadoop be run in? List a few features for each mode?

274

We have already sql then why nosql?

228

How can you set an arbitrary number of Reducers to be created for a job in Hadoop?

229

What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

260

Explain what is webdav in hadoop?

271




What is Mapper in Hadoop?

247

When should be hadoop archive create?

242

What does name-node mean in hadoop?

246

Mention what is distributed cache in hadoop?

229

Explain what is a sequence file in hadoop?

256

What is purpose of RecordWriter in Hadoop?

283

Explain the Single point of Failure in Hadoop?

233

What are the side effects of not running a secondary name node?

274

Explain Hadoop streaming?

237

Clarify what a task tracker is in hadoop?

229

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