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 the use of tools command?

204

Which command do we use to show the version?

164

What are the DDL commands used in hbase?

156

How will you explain COGROUP in Pig?

691

What are the 2 modes used to run pig scripts?

649

What co-group does in Pig?

669

Is the keyword ‘FUNCTIONAL’ a User Defined Function (UDF)?

596

Is the keyword ‘DEFINE’ as a function name?

607

How to show up details in pig ?

631

What does FOREACH do?

610

What relational operators can we use that are related to combining and splitting in Pig language?

592

What are the different modes available in Pig?

599

How is Pig Useful For?

669

How to restrict the number of lines to be printed in pig ?

623

What is the difference between logical and physical plans?

588

Un-Answered Questions { Hadoop }

What are the components of Pig Execution Environment?

620

How does reducebykey work in spark?

276

what does the text input format do?

863

What is action, how it process data in apache spark

353

Name the types of tunable consistency?

What is a DStream?

333

How is jmx useful in cassandra?

What is Reducer in MapReduce?

777

Does Flume provide 100% reliability to the data flow?

137

How do you write your own custom SerDe ?

778

Can impala do user-defined functions (udfs)?

What is the replica placement Strategy in Cassandra ?

Define replication factor?

102

What is the difference between external table and managed table?

1017

Which modes can Hadoop be run in? List a few features for each mode?

506

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