Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What is BloomMapFile?

771

Highlight the difference between group and Cogroup operators in Pig?

908

How would you diagnose or do exception handling in the pig?

1006

What are the relation operations in Pig? Explain any two with examples?

758

Differentiate between Pig Latin and Pig Engine?

888

What is the function of co-group in Pig?

820

Explain about the scalar datatypes in Apache Pig?

967

Explain the uses of PIG?

1008

What are the complex datatypes in pig?

1022

What does illustrate do in Apache Pig?

965

What is UDF?

958

What are the different types of UDF's in Java supported by Apache Pig?

1090

What is the usage of foreach operation in Pig scripts?

911

How will you merge the contents of two or more relations and divide a single relation into two or more relations?

969

What is the MapReduce plan in pig architecture?

1099

Un-Answered Questions { Hadoop }

What is the difference between a MapReduce InputSplit and HDFS block?

805

Define the roles of the file system in any framework?

318

Difference between groupByKey vs reduceByKey in Apache Spark?

483

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1119

Whenever we run hive query, new metastore_db is created. Why?

731

What is a flume agent?

What are the uses of explode hive?

771

Where is the Mapper Output intermediate kay-value data stored ?

1412

Why Should we use Apache Kafka Cluster?

630

What is spark vs hadoop?

295

What is Cassandra Query Language?

What is the advantage of using –password-file rather than -P option while preventing the display of password in the sqoop import statement?

How does cassandra perform read operation?

Explain tajo configuration files?

What is the InputSplit in map reduce ?

1079

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