Comviva Technology Interview Questions, Process, and Tips

Use a tool like Rails migration to add a new column to the database table in production with 100 million data.

• Create a new Rails migration file to add the new column to the database table.

• Test the migration locally to ensure it works as expected.

• Deploy the migration to the production environment during a maintenance window to avoid downtime.

• Consider using tools like ActiveRecord's `change_column` method to efficiently

An application running in cloud with tightly coupled infrastructure can be deployed to on-premise by decoupling the components and using containerization.

• Decouple the application components to make them more portable

• Use containerization technologies like Docker to package the application and its dependencies

• Deploy the containerized application to on-premise servers using tools like Kubernetes for orchestration

I have created interactive dashboards using Tableau to visualize and analyze data for various projects.

• Utilized Tableau to connect to data sources and create interactive visualizations

• Designed dashboards with filters, drill-down capabilities, and dynamic elements

• Included key performance indicators (KPIs) and trend analysis in the dashboards

• Used color coding and data labels to enhance data interpretation

• Shared dashboard

Burpsuite is a web application security testing tool used for scanning, analyzing, and exploiting web applications.

• Burpsuite can intercept and modify HTTP/S requests and responses

• It can be used for scanning web applications for vulnerabilities

• Burpsuite includes tools for spidering, scanning, and intruder attacks

• It has a repeater tool for manually manipulating and re-sending requests

• Burpsuite can be used for session han