--- title: "Server side languages and multi-tier architecture" subject: "Web Technology" chapter: 3 key: "semester_7/web_technology:server-side-languages-multitier" source: https://www.bctengineer.com/q/semester_7/web_technology/server-side-languages-multitier site: BCT Engineering --- # Server side languages and multi-tier architecture Web Technology · Chapter 3: Server-side programming - Asked in: 2074 Chaitra, 2+2+2+4 marks - Video: [Lec-4: 2 tier and 3 tier Architecture with real life examples | Database Management System](https://www.youtube.com/watch?v=VyvTabQHevw) — Gate Smashers - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_7/web_technology/server-side-languages-multitier - Whole chapter: https://www.bctengineer.com/md/semester_7/web_technology/chapter-3 ## Question Explain any three server side scripting language used in web? Explain multi-tier architecture. ## Short answer Three server-side languages are PHP, embedded in HTML and paired with MySQL; JSP/Java Servlets, compiled and run in containers like Tomcat; and ASP.NET, Microsoft's compiled framework on IIS. Multi-tier architecture separates presentation, application logic, and data tiers, improving maintenance, scalability, and security. ## Answer #### Three server-side scripting languages 1. **PHP:** An open-source scripting language embedded in HTML and executed by the server. It works well with MySQL, is easy to learn and runs on Apache/Nginx. Used by WordPress and Laravel. ```php ``` 2. **JSP / Java Servlets:** Java-based. JSP pages are compiled into servlets and run in a container such as Tomcat. They are platform independent, secure and suitable for large enterprise applications. 3. **ASP.NET (C#):** Microsoft's framework, usually run on IIS, with strong tool support (Visual Studio), compiled code and built-in security and session management. Others: Python (Django/Flask), Node.js, Ruby on Rails, Perl. #### Multi-tier architecture A **multi-tier (n-tier) architecture** divides an application into separate logical (and often physical) layers, each with its own responsibility. A tier talks only to the adjacent tier. ```text +-----------------------------+ | Presentation tier (Browser) | UI, HTML/CSS/JS +--------------+--------------+ | +--------------v--------------+ | Application / Logic tier | PHP, Servlets, rules +--------------+--------------+ | +--------------v--------------+ | Data tier (Database) | MySQL, Oracle +-----------------------------+ ``` - **Presentation tier:** Shows information and collects user input. - **Application (business) tier:** Processes requests, applies rules, handles sessions and security. - **Data tier:** Stores and retrieves data. **Advantages:** Easier maintenance (change one tier without affecting the others), better scalability (run tiers on different servers), higher security (database hidden from users), code reuse, and parallel development by separate teams. **Disadvantage:** more complexity and some communication overhead. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. Which describes PHP? A. Microsoft framework on IIS B. Java compiled to servlets C. Open-source scripting embedded in HTML, works well with MySQL D. Client-side only language Answer: C. WordPress and Laravel use PHP. (Key point: PHP) 2. What happens to JSP pages? A. They run in the browser B. They are CGI scripts C. They are XML files D. They are compiled into servlets and run in a container Answer: D. JSP is Java based and platform independent. (Key point: JSP) 3. What is multi-tier architecture? A. Dividing an application into layers with separate responsibilities B. One program doing everything C. Only a browser D. Two identical servers Answer: A. Each tier talks to the adjacent tier. (Key point: Multi-tier) 4. Which is an advantage of multi-tier? A. Less communication overhead B. Change one tier without affecting others, and scale tiers separately C. Simpler design D. Database exposed to users Answer: B. The disadvantage is complexity and overhead. (Key point: Advantage) ## Related in Web Technology - [Client-side versus server-side scripting](https://www.bctengineer.com/question.md?key=semester_7%2Fweb_technology%3Aclient-vs-server-side-scripting) — Web Technology, chapter 3, asked 3× - [Web architecture and web-tier components](https://www.bctengineer.com/question.md?key=semester_7%2Fweb_technology%3Aweb-architecture-tiers) — Web Technology, chapter 2 - [Server-side programming and Java Servlet](https://www.bctengineer.com/question.md?key=semester_7%2Fweb_technology%3Aserver-side-programming-servlet) — Web Technology, chapter 3 - [Short note: Server side programming](https://www.bctengineer.com/question.md?key=semester_7%2Fweb_technology%3Ashort-note-server-side-programming) — Web Technology, chapter 3 - [Web services architecture; SOAP and WSDL roles](https://www.bctengineer.com/question.md?key=semester_7%2Fweb_technology%3Aweb-services-soap-wsdl) — Web Technology, chapter 8 ## Related in other subjects - [Conditional GET; 3-tier architecture components](https://www.bctengineer.com/question.md?key=semester_8%2Finternet_and_intranet%3Aconditional-get-3tier) — Internet and Intranet, chapter 4 - [High level languages and natural language](https://www.bctengineer.com/question.md?key=semester_1%2Fcomputer_programming%3Ahll-similar-natural-language) — Computer Programming, chapter 1 - [Web and file server communication](https://www.bctengineer.com/question.md?key=semester_7%2Fcomputer_networks_and_security%3Aweb-file-server-communication) — Computer Networks and Security, chapter 6 - [XML and JavaScript for client-side web apps](https://www.bctengineer.com/question.md?key=semester_8%2Finternet_and_intranet%3Axml-javascript-client-side) — Internet and Intranet, chapter 6