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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What is MapReduce?

1 1846

What MapReduce framework consists of?

1094

Can we submit the mapreduce job from slave node?

1105

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

914

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

1423

What is Reduce only jobs?

1 1707

What is a IdentityMapper and IdentityReducer in MapReduce ?

945

Explain Working of MapReduce?

971

Write a Mapreduce Program for Character Count ?

1049

how to proceed to write your first mapreducer program?

1343

How to set the number of reducers?

1362

Developing a MapReduce Application?

966

Different ways of debugging a job in MapReduce?

1106

Explain the Reducer's reduce phase?

1054

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

1 2771

Un-Answered Questions { Hadoop }

According to IBM, what are the three characteristics of Big Data?

435

Give a brief overview of Hadoop history?

418

Can you define a checkpoint?

467

What are the barriers?

What is the difference between traditional RDBMS and Hadoop?

1171

What is pig statistics?

527

what is SPF?

1510

What is the purpose of RecordReader in hadoop?

482

What is the abstraction of Spark Streaming?

263

What is spark rdd?

288

Name job control options specified by mapreduce.

706

How to set which framework would be used to run mapreduce program?

684

What are the advantages of datasets in spark?

277

Do we require two servers for the namenode and the datanodes?

527

What are the machine learning algorithms supports in apache mahout?

115

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