Unit 3: Web Servers, Java Servlet Architecture & Session Management

Unit 3 Learning Hub

Web Servers, Java Servlet Architecture & Session Management

Official MJPRU BCA Unit 3: Web Servers, Java Servlet Architecture & Session Management for BCA-303N (Web Technologies).

Syllabus Topics:Web Servers Overview: Apache Tomcat, Web Server vs Application Server, Java Servlet Development Kit (JSDK)Servlet Architecture: Java Servlet Specification, Advantages over CGI (Multithreading, Platform Independence, Persistence)Servlet Lifecycle: Class Loading, Instantiation, init() Initialization, service() Dispatch, destroy() CleanupDeployment and Configuration: Web Application Directory Structure, web.xml Deployment Descriptor, <servlet> and <servlet-mapping>Servlet API Core Packages: javax.servlet and javax.servlet.http Hierarchy, Servlet Interface, GenericServlet ClassHttpServlet Class: Handling HTTP Requests, doGet(), doPost(), doPut(), doDelete() Method ImplementationsHttpServletRequest Interface: Retrieving Form Parameters (getParameter, getParameterValues), Headers, Cookies & InputStreamsHttpServletResponse Interface: Setting MIME Content-Type, Character Encoding, Headers, Status Codes & PrintWriter OutputServlet Initialization & Context: Reading ServletConfig init-parameters, ServletContext Application-Wide ParametersState Management in Web Applications: Stateless Nature of HTTP Protocol, Challenges in Multi-Step WorkflowsCookies API: Creating Cookies, Setting Max-Age, Path, Domain, Secure and HttpOnly Flags, Client-Side StorageHttpSession Interface: Session Tracking, Session ID (JSESSIONID), URL Rewriting, getSession(boolean), Session Invalidation & Timeouts

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Introduction to Computers & The IPO Cycle

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Topic 1 · The foundation of modern computing

Introduction to Computers & The IPO Cycle

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Ready to master this concept? Give it a quick read & tap the check!

💡 The Big Picture:A computer is an electronic system that takes raw data as Input, processes it under programmed logic, and produces meaningful Information as Output.

🍪 Everyday Analogy:Think of baking cookies: Flour & Sugar (Input) ➔ The Oven (Processing) ➔ Warm Delicious Cookie (Output)! 🍪

Key Exam Takeaways

·Data = Raw, unprocessed facts without context (e.g. 42, 'apple').
·Information = Structured data with meaning (e.g. 'Temperature: 42°C').
·Hardware is what you can touch; Software is the instructions running inside.

Instant Knowledge Check

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Which of the following represents unprocessed raw facts?

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