Big Data Interview Questions
Questions Answers Views Company eMail

What is a 'block' in HDFS?

205

What is Derby database?

183

How many Daemon processes run on a Hadoop system?

391




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

196

How the Client communicates with HDFS?

259

What is NoSQL?

188

What is Row Key?

189

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

173

What does the overwrite keyword denote in Hive load statement?

1 737

What is IdentityMapper?

178

Why do we use Hadoop?

177

what is the typical block size of an HDFS block?

193

What is Hadoop Custom partitioner ?

254

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

351

What stored in HDFS?

157







Un-Answered Questions { Big Data }

What is the process to change the files at arbitrary locations in HDFS?

545


What is a bag in Pig Latin?

126


Why Mapreduce output written in local disk?

186


What are Flume events?

6


how is a file of the size 1 GB uncompressed

164






How Pig differs from MapReduce?

194


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

135


What problems can be addressed by using Zookeeper?

196


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

238


Explain the Reducer's Sort phase?

191


Write a Mapreduce Program for Character Count ?

316


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

65


what is hadoop archive?

176


How many Daemon processes run on a Hadoop system?

391


Explain the difference between NameNode

195