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Hadoop Interview Questions
Questions Answers Views Company eMail

What is HBase?

 310

What happens to a NameNode that has no data?

 1247

What is a Hive Metastore?

 1 1467

How can an application connect to Hive run as a server?

 827

What is a heartbeat in HDFS?

 620

What are sink processors?

 631

What is the reason for creating a new metastore_db whenever Hive query is run from a different directory?

 704

Does hadoop always require digital data to process?

 769

what is meaning Replication factor?

 639

What is the purpose of RawComparator interface?

 794

Where is the Mapper Output stored?

 1057

What is the function of ApplicationMaster?

 662

What problems can be addressed by using Zookeeper?

 679

Can there be no Reducer?

 575

What is Hadoop streaming?

 733

Un-Answered Questions { Hadoop }

What is an rdd?

199

How to iterate all rows in ColumnFamily?

60

Mention what are the most common input formats defined in hadoop?

247

What does producer api in kafka?

277

Explain InputSplit in Hadoop MapReduce?

389




Are multiline comments supported in Hive?

2844

How to enable recycle bin in hadoop?

447

Differentiate between the physical plan and logical plan in Pig script?

503

What are the core benefits for hadoop users by using apache ambari?

49

what are the different modes of Hive?

407

How do ‘map’ and ‘reduce’ work?

350

What do you mean by the high availability of a namenode?

15

What kind of datawarehouse application is suitable for Hive?

432

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

296

What are the benefits of lazy evaluation?

196

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