Big Data Interview Questions
Questions Answers Views Company eMail

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

59

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

57

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

73




Is it possible to rename the output file?

49

how JobTracker schedules a task ?

49

what is NameNode in Hadoop?

61

what does the conf.setMapper Class do ?

53

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

49

What is SequenceFileInputFormat?

62

What is a "map" in Hadoop?

57

What is a "reducer" in Hadoop?

61

what is Speculative Execution?

51

Explain JobConf in MapReduce.

56

What is OutputCommitter?

56

How is reporting controlled in hadoop?

53







Un-Answered Questions { Big Data }

What do the four V's of Big Data denote?

42


what does the text input format do?

53


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

73


What is the port number for NameNode

123


What can be optimum value for Reducer?

150






What is Hive query processor?

73


What is crontab? Explain with suitable example?

208


What is the main purpose of HDFS fsck command?

681


What are channel selectors?

169


How can you add the arbitrary key-value pairs in your mapper?

316


What is HDFS Federation?

186


Different running modes for running Pig?

212


what is difference between pig and sql?

1198


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

231


Does Flume provide 100% reliability to the data flow?

5