Big Data Interview Questions
Questions Answers Views Company eMail

What is a 'block' in HDFS?

160

What is Derby database?

150

How many Daemon processes run on a Hadoop system?

363




What are the limitations of importing RDBMS tables into Hcatalog directly?

160

How the Client communicates with HDFS?

224

What is NoSQL?

150

What is Row Key?

149

What is a Task instance in Hadoop? Where does it run?1

135

What does the overwrite keyword denote in Hive load statement?

1 571

What is IdentityMapper?

138

Why do we use Hadoop?

146

what is the typical block size of an HDFS block?

149

What is Hadoop Custom partitioner ?

211

What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

267

What stored in HDFS?

118







Un-Answered Questions { Big Data }

Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?

393


What if rack 2 and datanode fails?

256


How do users interact with HDFS in Apache Pig ?

99


How Mapper is instantiated in a running job?

221


How much data is enough to get valid outcome?

38






What is Big Data Analytics?

61


How you can contact your client everyday ?

135


What are the complex datatypes in pig?

136


What is NoSQL?

150


What are the steps to submit a Hadoop job?

111


what is meaning Replication factor?

148


Does hadoop always require digital data to process?

262


Is map like a pointer?

168


What is difference between split and block in hadoop?

580


mapper or reducer?

144