This application solves a Coding exercise.

• The application is based out of Scala and Spark. It is built using Maven build tool.
• Use the runbook to run the application
• The provided dataset is in the resource directory here
• Answers to the questions

1. What is the count of all rows?

• 2083

2. What is the city with the largest population?

• GBR and Malita

3. What is the total population of all cities in Brazil (CountryCode == BRA)?

• 25117070

4. What changes could be made to improve your program's performance.

• The program has been made performant based on all possible things noticed.

5. How would you scale your solution to a much larger dataset (too large for a single machine to store)?

• Since this application is build using Spark framework, it can be scaled up using a Hadoop cluster. To run the application on a cluster, the run time parameters need to be set accordingly.