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Hadoop General Interview Questions
Questions Answers Views Company eMail

Explain what is sequencefileinputformat?

 237

Mention how hadoop is different from other data processing tools?

 234

Mention what are the most common input formats defined in hadoop?

 247

Mention what is rack awareness?

 223

Mention what is the difference between an rdbms and hadoop?

 237

Mention what are the three modes in which hadoop can be run?

 232

Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?

 405

Explain what is storage and compute nodes?

 266

Explain how jobtracker schedules a task?

 252

Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

 256

What happens in text format?

 236

Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

 260

Explain what is a task tracker in hadoop?

 221

Explain what is speculative execution?

 216

Explain what happens in text format?

 300

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Un-Answered Questions { Hadoop General }

Name the operating system(s) which are supported for production hadoop deployment?

241

Define a record reader?

226

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

269

What is active and passive NameNode in Hadoop?

245

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

243




How many daemon processes run on a hadoop cluster?

234

What is the role of the secondary namenode?

235

List out some common problems faced by data analyst?

244

How to create a user in Hadoop?

226

Clarify how job tracker schedules an assignment?

243

Explain how do you overwrite replication factor?

236

Explain what is storage and compute nodes?

266

Which scala library is used for functional programming?

252

What is a record reader?

224

What is pseudo-distributed mode?

346

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