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Hadoop Interview Questions
Questions Answers Views Company eMail

What is MapReduce?

 462

What MapReduce framework consists of?

 447

Can we submit the mapreduce job from slave node?

 522

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

 325

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

 458

What is Reduce only jobs?

 293

What is a IdentityMapper and IdentityReducer in MapReduce ?

 308

Explain Working of MapReduce?

 336

Write a Mapreduce Program for Character Count ?

 400

how to proceed to write your first mapreducer program?

 717

How to set the number of reducers?

 668

Developing a MapReduce Application?

 313

Different ways of debugging a job in MapReduce?

 466

Explain the Reducer's reduce phase?

 362

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

 1 1045






Un-Answered Questions { Hadoop }

How Cassandra provide High availability feature?

6

What are the features of apache mahout?

1

Explain how cassandra delete data?

21

Does hadoop always require digital data to process?

428

Explain the Use of Hive?

61




How to perform the inter-cluster data copying work in HDFS?

1

What is mapper in map reduce?

48

Is a job split into maps?

359

What do you understand by the term snitch in cassandra?

9

Explain the Constituents of Apache ZooKeeper Architecture?

1

What are the key differences between cassandra and traditional rdbms?

8

What is the use of flatmap in spark?

9

How do we write our own custom serde?

62

How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?

48

Which companies are mostly using Hive ?

58

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