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?

54


Is client the end user in HDFS?

235


What are the different types of Znodes?

183






what is pig?

97


what are the basic parameters of a Mapper?

42


How you can contact your client everyday ?

150


What are the use cases of Apache Pig?

116


Does Apache Spark provide check pointing?

67


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?

49


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?

48