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

Hadoop Interview Questions

Questions Answers Views Company eMail

What is MapReduce?

340

What MapReduce framework consists of?

332

Can we submit the mapreduce job from slave node?

379

How can we control particular key should go in a specific reducer?

205

How can you add the arbitrary key-value pairs in your mapper?

316

What is Reduce only jobs?

177

What is a IdentityMapper and IdentityReducer in MapReduce ?

202

Explain Working of MapReduce?

218

Write a Mapreduce Program for Character Count ?

299

how to proceed to write your first mapreducer program?

600

How to set the number of reducers?

525

Developing a MapReduce Application?

211

Different ways of debugging a job in MapReduce?

361

Explain the Reducer's reduce phase?

251

Why do we use HDFS for applications having large data sets and not when there are lot of small files?

1 590

Un-Answered Questions { Hadoop }

Developing a MapReduce Application?

211

What is the input type/format in MapReduce by default?

314

What are the different ways of executing Pig script?

Is client the end user in HDFS?

235

What are the different types of Znodes?

183

what is pig?

what are the basic parameters of a Mapper?

How you can contact your client everyday ?

150

What are the use cases of Apache Pig?

116

Does Apache Spark provide check pointing?

What other technologies have you used in hadoop sta ck?

204

How can you connect an application

237

How to write 'foreach' statement for map datatype in pig scripts?

Command to format the NameNode?

144

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

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