Difference between var and val in spark- Interview question

Var keyword is just similar to variable declaration in Java whereas Val is little different. Once a variable is declared using Val the reference cannot be changed to point to another reference.... Read more »

Lazy Evaluation in Apache Spark

Lazy evaluation in Spark means that the execution will not start until an action is triggered. The Spark Lazy evaluation, users can divide into smaller operations. It reduces the number of passes... Read more »

Difference between Coalesce and Repartition- Hadoop Interview question

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Hive partition with example – Interview Question

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Hive Basic Important command in Hindi

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Sqoop import – Part 1- Hadoop series

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Hadoop Training Syllabus

During the class you will go through the following hadoop contents. Linux (Ubuntu/Centos) – Tips and Tricks Introduction to Big Data and Hadoop Hadoop ecosystem concepts Hadoop MapReduce concepts and features Hive... Read more »

Big data and Hadoop difference

This article gives the difference between hadoop and big data. I personally found many students have confusion between hadoop and big data. Actually both are different entity. In one sentense I would... Read more »

Switch your career from Oracle DBA to Hadoop Bigdata

I have seen a many people those who want to switch their career from the Oracle DBA to the Hadoop but they are not sure how to start and from where to... Read more »

Querying on CSV file using Spark SQL

Apache Spark SQL is a Spark module to simplify working with structured data using DataFrame and DataSet abstractions in Python, Java, and Scala. These abstractions are the distributed collection of data organized... Read more »