Big Data Interview Questions
Questions Answers Views Company eMail

what is JobTracker in Hadoop? What are the actions followed by Hadoop?

47

Is it possible to split 100 lines of input as a single split in MapReduce?

43

What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

45




Is it possible to rename the output file?

38

how JobTracker schedules a task ?

36

what is NameNode in Hadoop?

51

what does the conf.setMapper Class do ?

37

how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

39

What is SequenceFileInputFormat?

51

What is a "map" in Hadoop?

47

What is a "reducer" in Hadoop?

48

what is Speculative Execution?

41

Explain JobConf in MapReduce.

44

What is OutputCommitter?

44

How is reporting controlled in hadoop?

41







Un-Answered Questions { Big Data }

How businesses could be benefitted with Big Data?

41


Differentiate between Pig Latin and Pig Engine?

102


Explain about the different types of partitioning in Hive?

56


Where is the Mapper Output stored?

520


State the usage of 'filters', 'group' , 'orderBy', 'distinct' keywords in pig scripts?

47






What is Hive Present Version ?

300


How we can take Hadoop out of Safe Mode?

136


explain Metadata in Namenode?

125


what is the default replication factor in HDFS?

149


What are watches?

155


What are the different types of tombstone markers in HBase for deletion?

423


Do you need to install Spark on all nodes of Yarn cluster while running Spark on Yarn?

81


Does Hadoop requires RAID?

164


Is client the end user in HDFS?

217


For a job in Hadoop, is it possible to change the number of mappers to be created?

52