Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

How to add/delete a Node to the existing cluster?

255

What is Mapper in Hadoop?

251

What is Reducer in Hadoop?

250

What are the most common InputFormats in Hadoop?

298

Explain InputSplit in Hadoop?

235

What is the purpose of RecordReader in hadoop?

229

What is Combiner in Hadoop?

251

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

238

Why aggregation cannot be done in Mapper?

302

Explain map-only job?

276

What is KeyValueTextInputFormat in Hadoop?

264

What happen if number of reducer is set to 0 in Hadoop?

241

What is TextInputFormat in Hadoop?

233

What is purpose of RecordWriter in Hadoop?

285

What are the most common OutputFormat in Hadoop?

298

Un-Answered Questions { Big Data }

What is spark machine learning?

154

Give key features of any NoSQL database?

How can one check whether NameNode is working or not?

271

Can you modify the file present in hdfs?

Can you explain spark core?

186

How do I stop flume agent?

What are benefits of DataFrame in Spark?

229

Is it possible to do an incremental import using Sqoop?

Where the mapper's intermediate data will be stored?

341

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

291

what are the three modes in which Hadoop can be run?

359

How to add/delete a Node to the existing cluster?

255

List Hadoop’s three configuration files?

221

Who invented spark?

224

How does pipe operation writes the result to standard output in Apache Spark?

208

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