BCA Semester 3 – Web Technology – Unit 4: The Server Tier (8Hrs)

Importance of Server-Side Programming Server-side programming refers to code that runs on the web server to process user requests, interact with databases, and generate dynamic web content. It is impo

Unit 4: The Server Tier Question: Why Session is Important for Web Development? Write a Server-Side Script to Create, Store, Retrieve, and Remove Session and Cookies. (5 Marks) --- Importance o

What is Multi-Tier Technology? Multi-tier technology is a software architecture where an application is divided into multiple layers (tiers). Each tier has a specific responsibility such as presenta

Aim To write a server-side login program that: - Accepts username and password - Validates user credentials - Redirects to home page if valid - Displays error message if invalid --- Concept of Server

A web server is used to store, process, and deliver web pages and services to clients (browsers). Common Applications: - Hosting websites and web pages - Running web applications (e.g., e-commerce,

--- 1. Anonymous Access (2 Marks) Anonymous Access is a web server authentication method that allows users to access a website without providing a username or password. Key Points: - User identity i

1. What is a Session? (2 Marks) A session is a server-side mechanism used to store user information temporarily while the user interacts with a web application. Since HTTP is stateless, sessions hel

1. What is a Web Server? (2 Marks) A web server is a software (and sometimes hardware) system that stores, processes, and delivers web pages to clients (web browsers) using the HTTP/HTTPS protocol. E

1. Definition XML (eXtensible Markup Language) is used to store and transport data in a structured, human-readable format. A well-formed XML follows proper syntax rules (one root element, properly n

Tier Technology divides a web application into multiple logical layers (tiers), where each tier has a specific responsibility. This separation improves scalability, maintainability, security, and perf

How a Web Server Processes HTTP Requests and Responses (5 Marks) A web server is software that receives HTTP requests from clients (browsers), processes them, and sends back HTTP responses. It acts as

Login and Logout Using Cookies (Without Database) Cookies are small pieces of data stored on the client’s browser. They can be used to maintain user login state without using a database. --- 1. Con

Server-Side Script to Calculate x Using Two Text Boxes Server-side scripting processes user input on the server and returns the calculated result to the client. --- 1. HTML Form (input.html) html <!D

Problem Overview Given an XML document containing a list of products with the elements: - productname - category - price - quantity Write an XSLT stylesheet that performs the following tasks: a) Filt

Unit 4: The Server Tier Server-Side Script to Display and Update User Data from Database (10 Marks) 1. Problem Definition The objective is to: - Retrieve user details from a database using a selecte

1. Overview - 3-Tier Architecture: Divides an application into three layers: 1. Presentation Layer – User interface (UI) 2. Logic/Business Layer – Processes business rules 3. Data Layer – Databa

Definition of Session A Session is a way to store information about a user across multiple requests in a web application. It allows the server to remember the user’s state, preferences, or login infor

Example: PHP Script to Insert Data into Database Scenario: Insert user information (name, email, phone) into a MySQL database called store and table information. php <?php // Database connection detai

1. Key Components of an XML File (2 Marks) An XML file consists of the following key components: XML Declaration Specifies XML version and encoding. Example: <?xml version="1.0" encoding="UTF-

1. Concept of Server-Side Login (1 Mark) - Server-side scripts process user input securely on the server. - Login validation checks credentials before allowing access. - Common server-side languages: