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 impala be used for complex event processing?

169

What is the use of cassandra cql collection?

How analysis of Big Data is useful for organizations?

433

Use of Codegen command in Hadoop sqoop?

Which database the sqoop metastore runs on?

List the benefits of Spark over MapReduce.

279

How to enable buckets in Hive?

900

What do shuffling do?

631

If you omit the overwrite clause while creating a hive table,what happens to file which are new and files which already exist?

720

What is a tuple in pig?

516

What is the difference between Caching and Persistence in Apache Spark?

302

What is hadoop sqoop?

How to get the single file as the output from MapReduce Job?

603

What is difference between coalesce and repartition?

345

How do you categorize a big data?

712

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