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 }

What is Apache Spark? What is the reason behind the evolution of this framework?

294

What is the work of hive/hcatalog?

791

What is difference between regular file system and HDFS?

1114

Define a worker node?

471

How to Delete directory from HDFS?

How to submit extra files(jars, static files) for MapReduce job during runtime?

739

Name the filter which accepts the page size as the parameter in hbase?

192

How many ways we can create rdd?

295

what is a datanode?

984

What is a column family in Cassandra?

What is a Hive variable? What for we use it?

852

Name the operating system(s) which are supported for production hadoop deployment?

486

Explain what happens if, during the PUT operation, HDFS block is assigned a replication factor 1 instead of the default value 3?

Name the two types of shared variable available in Apache Spark?

312

What happens if the preferred replica is not in the isr?

625

For More Un-Answered { Big Data } Questions Click Here