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

Hadoop Interview Questions

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How many default mappers in sqoop ?

Write a quert to import a file in sqoop?

What is Sqoop Import? Explain its purpose?

What is the default file format to import data using Apache Sqoop?

How can I import large objects (BLOB and CLOB objects) in Apache Sqoop?

How can you execute a free-form SQL query in Sqoop to import the rows in a sequential manner?

Does Apache Sqoop have a default database?

How will you list all the columns of a table using Apache Sqoop?

Name a few import control commands. How can Sqoop handle large objects?

How can we import data from particular row or column? What is the destination types allowed in Sqoop import command?

When to use –target-dir and when to use –warehouse-dir while importing data?

What is the significance of using –compress-codec parameter?

Can free-form SQL queries be used with Sqoop import command? If yes, then how can they be used?

What is the importance of eval tool?

How can you import only a subset of rows from a table?

Un-Answered Questions { Hadoop }

What is skew data in hive?

699

What is a sqoop metastore?

Why does hive not store metadata information in hdfs?

Define RDD?

324

what does the shell commands “Capture” and “Consistency” determines?

111

Is it possible to use Kafka without ZooKeeper?

652

What are the collection data types provided by CQL?

Explain MemStore?

176

When you are dealing with static data instead of dynamic data?

735

What is REST?

247

Is it necessary to know java to learn hadoop?

663

What is mahout hadoop?

What are the important differences between apache and hadoop?

704

State some DDL Command with brief Description?

What are the options-process for upgrading zookeeper?

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