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

Why do the nodes are removed and added frequently in a hadoop cluster?

475

What is a namenode?

407

Can hadoop handle streaming data?

467

What is hadoop? Name the main components of a hadoop application?

447

What do you know about yarn?

418

What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

447

What is the purpose of exploding in hive?

678

Can you list few commonly used hive services?

663

What is the difference between piglatin and hiveql?

663

How can you transfer data from hive to hdfs?

716

What is the difference between sort by and order by in hive?

689

How can you connect an application, if you run hive as a server?

719

Can you explain smb join in hive?

740

Can you define serde in hive?

683

Can you explain sqoop metastore?

Un-Answered Questions { Hadoop }

How does a client read/write data in HDFS?

Is there any benefit of learning MapReduce, then?

294

What is spark database?

336

What is a MapFile?

747

Why hbase is a schema-less database?

184

what is meaning Replication factor?

963

What is the use of having Filters in Apache Pig ?

706

What does it indicate if replica stays out of ISR for a long time?

707

What is a Secondary Namenode? Is it a substitute to the Namenode?

1035

What is the difference between leader and follower in kafka?

561

What is client mode in spark?

322

How to submit extra files(jars, static files) for MapReduce job during runtime?

679

How is hadoop different from spark?

270

Difference between external table and internal table in HIVE ?

928

Can rdd be shared between sparkcontexts?

287

For More Un-Answered { Hadoop } Questions Click Here