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

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1069

What is difference between regular file system and HDFS?

1056

What is rack-aware replica placement policy?

1026

What is Hadoop?

1 1630

Are Namenode and job tracker on the same host?

1457

What are the limitations of Hive?

1036

Which company initially developed Hive ?

1 2416

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1106

What are the components of Hive architecture?

1112

What is HDFS Federation?

984

What are watches?

1033

Explain the Job OutputFormat?

960

Virtual Box & Ubuntu Installation?

989

What is the difference between HDFS and NAS ?

1372

How Mapper is instantiated in a running job?

993

Un-Answered Questions { Hadoop }

What are the advantages of DataSets?

291

What is bucketing ?

683

State some DDL Command with brief Description?

When should you use sequencefileinputformat?

662

What is the benifit of Distributed cache, why can we just have the file in HDFS and have the application read it?

What do you understand by standalone (or local) mode?

428

What is spark vs scala?

269

What are the features of Spark?

291

Does rdd have schema?

321

What are the steps involved in MapReduce framework?

981

Is multiline comment supported in Hive Script ?

688

What do you know about nlineinputformat?

683

The partition of hive table has been modified to point to a new directory location. Do I have to move the data to the new location or the data will be moved automatically to the new location?

1000

What is struct and explain its purpose?

514

What are pig scripts?

586

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