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Hadoop Interview Questions
Questions Answers Views Company eMail

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

 340

Explain what is a task tracker in hadoop?

 289

Explain what is speculative execution?

 297

Explain what happens in text format?

 416

Mention what is distributed cache in hadoop?

 307

Explain how can you debug hadoop code?

 327

Explain how can you check whether namenode is working beside using the jps command?

 325

Explain what is webdav in hadoop?

 352

Mention what job does the conf class do?

 316

For using hadoop list the network requirements?

 298

Explain deletion in hbase? Mention what are the three types of tombstone markers in hbase?

 131

What are the main key structures of hbase?

 140

What is the use of hbase hmaster?

 134

Which technique can you use in hbase to access hfile directly without the help of hbase?

 154

Explain what is wal and hlog in hbase?

 231

Un-Answered Questions { Hadoop }

How to set property in apache tajo?

5

What is the difference between MapReduce engine and HDFS cluster?

89

How to create database statement in apache tajo?

5

Does the hdfs client decide the input split or namenode?

499

Is hadoop required for spark?

250

What is the difference between spark and python?

227

How is the splitting of file invoked in Hadoop ?

355

Name the scalar data type and complex data types in Pig?

516

Characterize data integrity? How does hdfs ensure information integrity of data blocks squares kept in hdfs?

37

What does producer api in kafka?

364

what if job tracker machine is down?

349

what is Zookeeper in Kafka? Can we use Kafka without Zookeeper?

421

What is spark lineage?

256

Name the operations supported by rdd?

278

Is there an update statement?

96

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