Big Data Interview Questions
Questions Answers Views Company eMail

Which company initially developed Hive ?

1 710

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

228

What are the components of Hive architecture?

324




What is HDFS Federation?

210

What are watches?

204

Explain the Job OutputFormat?

244

Virtual Box & Ubuntu Installation?

172

What is the difference between HDFS and NAS ?

496

How Mapper is instantiated in a running job?

258

Where do you specify the Mapper Implementation?

192

What is the meaning of speculative execution in Hadoop? Why is it important?

252

What is the InputFormat ?

211

Command to format the NameNode?

162

Who is a 'user' in HDFS?

191

What is the meaning of the term "non-DFS used" in Hadoop web-console?

429







Un-Answered Questions { Big Data }

How Pig differs from MapReduce?

193


Explain Working of MapReduce?

237


What is the Reducer used for?

216


Explain the need for MapReduce while programming in Apache Pig?

98


What is IdentityMapper?

178






What is 'Key value pair' in HDFS?

182


What are the different components of a Hive query processor?

192


What problem does Apache Flume solve?

5


Explain about the popular use cases of Apache Spark

80


Explain about the core components of Flume?

5


How we can take Hadoop out of Safe Mode?

171


What are benefits of Spark over MapReduce?

71


What are the additional benefits YARN brings in to Hadoop?

205


how can you debug Hadoop code?

77


What are the components of Apache Pig platform?

145