Mastering Ruby on Rails: Scaling Your Web Application for Maximum Performance. Learn how to distribute incoming traffic across multiple servers using load balancing techniques like round-robin DNS, HAProxy, and NGINX, and how to cache frequently accessed data in memory to improve performance and scalability.

Mastering optionals is crucial to writing robust and efficient Swift code. Learn how to safely unwrap optionals using optional binding, guard statements, and the nil-coalescing operator to avoid runtime errors and crashes. By following these best practices, you can write safer, more concise, and more readable code.

Develop a C++ program that handles errors and exceptions gracefully, using best practices for exception-safe code and built-in exception handling mechanisms. Learn about types of exceptions in C++, including synchronous and asynchronous exceptions, and understand how to use try-catch blocks and custom exception types to manage errors. Master the fundamentals of exception handling in C++ to write robust and reliable code.