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

Big Data Interview Questions

Questions Answers Views Company eMail

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?

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

What do you mean by Free Form Import in Sqoop?

Un-Answered Questions { Big Data }

Can you tell us how many daemon processes run on a hadoop system?

342

Name three data source available in SparkSQL

208

What are the parameters of mappers and reducers?

227

What is the use of “ResultSet execute(Statement statement)” method?

What is the difference between spark and hive?

198

Explain repository in apache ambari?

What are the components of presto architecture?

What happens when you submit spark job?

184

Does Pig support multi-line commands?

565

Do we need to install spark in all nodes?

187

What is heartbeat in hdfs? Explain.

367

Which laptop is best for big data?

200

What will be the result when you do cast(‘abc’ as int)?

461

Explain how Hive Deserialize and serialize the data?

434

What do you know about schemardd?

201

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