LinkedIn transitioned from a monolithic architecture to a microservices-based approach, introducing REST along the way. Starting with their original codebase in Java, Servlets, JSP, and JDBC, they evolved to a service-oriented architecture with fine-grained services. Challenges such as test failures

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Interaction between web clients and servers in Java servlet-based web apps, from handling HTTP requests to employing helper apps for dynamic content generation. Overview of server responses, CGI helper programs, and how servlets work within a web container like Tomcat.

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Servlets are small programs that execute on the server side of web connections, dynamically extending the functionality of a web server. They provide a way to interact with clients, handle requests, and generate responses. Servlets have evolved from the early days of CGI scripts, offering better per

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