Big Data Interview Questions
Questions Answers Views Company eMail

What is Hadoop Map Reduce ?

52

what does the text input format do?

53

What happens when a datanode fails ?

56




In Hadoop, which file controls reporting in Hadoop?

50

how can you debug Hadoop code?

50

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

62

What are the primary phases of a Reducer?

41

how indexing in HDFS is done?

46

What is the role of a MapReduce partitioner?

52

Is it important for Hadoop MapReduce jobs to be written in Java?

46

what job does the conf class do?

51







Un-Answered Questions { Big Data }

What is the difference between SQL and NoSQL?

192


What is HDFS ? How it is different from traditional file systems?

130


what are the steps involved in decommissioning removing

136


What is Apache Pig?

122


Different ways of debugging a job in MapReduce?

361






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

58


What is UDF?

176


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

231


What is SequenceFileInputFormat?

62


what does the text input format do?

53


Is a job split into maps?

189


What are the components of Hive architecture?

296


What is RDD?

78


what are relational operations in pig latin?

130


How can we control particular key should go in a specific reducer?

205