🚀 Top Interview Questions and Answers for Senior Full Stack Ruby on Rails Developers

Landing a Senior Full Stack Ruby on Rails position requires thorough knowledge of both backend and frontend technologies. Below, I’ll walk you through some of the most commonly asked interview questions, along with detailed answers to help you ace your interview! 😎💡

1. How would you improve the performance of a large-scale Rails application experiencing slow response times? 🐢🚀

Answer:
This question requires a holistic approach. Some performance optimizations include:
- Database Optimization: Look at slow queries using tools like `EXPLAIN`. Use caching, proper indexing, and avoid N+1 queries by eager loading associations.
- Full-Text Search Tools: Consider using Elasticsearch or Algolia for faster querying if your app is text-heavy.
- Background Jobs: Offload long-running tasks (e.g., sending emails, file uploads) to background jobs using Sidekiq or Resque.
- CDN for Assets: Use a CDN to serve assets (images, JS, CSS), reducing load on your servers.
- Application Profiling: Use tools like New Relic or Skylight to identify bottlenecks in the code.
- Horizontal Scaling: Consider distributing the workload across multiple servers using load balancers and containers like Docker and Kubernetes.