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?

1117

What is difference between regular file system and HDFS?

1091

What is rack-aware replica placement policy?

1066

What is Hadoop?

1 1685

Are Namenode and job tracker on the same host?

1490

What are the limitations of Hive?

1069

Which company initially developed Hive ?

1 2482

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

1139

What are the components of Hive architecture?

1152

What is HDFS Federation?

1027

What are watches?

1064

Explain the Job OutputFormat?

997

Virtual Box & Ubuntu Installation?

1043

What is the difference between HDFS and NAS ?

1417

How Mapper is instantiated in a running job?

1032

Un-Answered Questions { Hadoop }

What is a heartbeat in HDFS?

973

What are the characteristics of hadoop framework?

700

Detail description of the Reducer phases?

904

Explain the main difference between kafka and flume?

646

Explain tomap function?

629

Can you explain spark core?

280

What is the difference between Column and SuperColumn?

152

Can I run an ensemble cluster behind a load balancer?

What are the four basic parameters of a reducer?

705

What are the different components of Cassandra?

109

Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?

721

What is the role zookeeper plays in a cluster of kafka?

528

Clarify how job tracker schedules an assignment?

451

What does ambari shell can provide?

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1117

For More Un-Answered { Hadoop } Questions Click Here