Advanced Java Programming (4351603) - Summer 2025 Solution

Question 1(a) [3 marks]

Write a difference between AWT and Swing.

Answer:

Table: AWT vs Swing Comparison

• AWT: Uses native OS components
• Swing: Uses Java's own components
• Pluggability: Swing supports customizable UI

Mnemonic: "Swing is Smart - Platform Independent and Pluggable"

Question 1(b) [4 marks]

List out various Layout Managers. Explain Flow Layout manager with example.

Answer:

Layout Managers List:

• FlowLayout: Left to right arrangement
• BorderLayout: North, South, East, West, Center
• GridLayout: Equal sized grid cells
• CardLayout: Stack of components
• BoxLayout: Single row or column

FlowLayout Example:

Java

Mnemonic: "Flow Like Water - Left to Right"

Question 1(c) [7 marks]

Create a Swing program using checkbox that allows users to select multiple items from a list of options. Display the selected items.

Answer:

Java

Key Features:

• Multiple Selection: Users can select multiple checkboxes
• Real-time Display: Shows selected items immediately
• ItemListener: Handles checkbox state changes

Mnemonic: "Check Multiple, Display All"

Question 1(c) OR [7 marks]

Develop a Java program using various swing components.

Answer:

Java

Components Used:

• JTextField: Text input
• JComboBox: Dropdown selection
• JRadioButton: Single selection
• JButton: Action trigger

Mnemonic: "Text, Combo, Radio, Button - Complete Form"

Question 2(a) [3 marks]

Explain Swing controls with example.

Answer:

Table: Common Swing Controls

Basic Example:

Java

Mnemonic: "Button, Text, Label, Check - Basic Four"

Question 2(b) [4 marks]

List JDBC drivers and explain any two.

Answer:

JDBC Drivers List:

1. Type 1: JDBC-ODBC Bridge
2. Type 2: Native API Driver
3. Type 3: Network Protocol Driver
4. Type 4: Thin Driver

Detailed Explanation:

Type 1 - JDBC-ODBC Bridge:

• Purpose: Converts JDBC calls to ODBC calls
• Advantage: Works with any ODBC database
• Disadvantage: Platform dependent, slower performance

Type 4 - Thin Driver:

• Purpose: Pure Java driver, direct database communication
• Advantage: Platform independent, best performance
• Disadvantage: Database specific

Mnemonic: "Bridge-Native-Network-Thin: 1-2-3-4"

Question 2(c) [7 marks]

Explain Object Relational Mapping (ORM) with its advantages and tools.

Answer:

Object Relational Mapping (ORM): ORM is a technique that maps object-oriented programming concepts to relational database structures.

Table: ORM Advantages

Popular ORM Tools:

• Hibernate: Most popular Java ORM
• JPA: Java Persistence API standard
• MyBatis: SQL mapping framework
• EclipseLink: Reference implementation

Working Model:

• Objects → ORM → Tables
• Automatic SQL generation
• Type-safe queries

Mnemonic: "Objects Relate Magically"

Question 2(a) OR [3 marks]

Describe MOUSEEVENT and MOUSELISTENER interface with example.

Answer:

MouseEvent: Generated when mouse actions occur on components.

MouseListener Interface Methods:

• mouseClicked(): Mouse button clicked
• mousePressed(): Mouse button pressed
• mouseReleased(): Mouse button released
• mouseEntered(): Mouse enters component
• mouseExited(): Mouse exits component

Example:

Java

Mnemonic: "Click-Press-Release-Enter-Exit"

Question 2(b) OR [4 marks]

List and explain the components of the JDBC API.

Answer:

Table: JDBC API Components

Component Details:

• DriverManager: Establishes connection with database
• Connection: Represents database session
• Statement: Executes SQL queries
• ResultSet: Holds query results

Basic Usage:

Java

Mnemonic: "Driver Connects, Statement Executes, ResultSet Returns"

Question 2(c) OR [7 marks]

Draw and explain the architecture of Hibernate.

Answer:

Architecture Components:

Table: Hibernate Architecture

Layer Description:

• Application Layer: Java objects and business logic
• Hibernate Layer: ORM mapping and session management
• Database Layer: Actual data storage

Key Features:

• Automatic table creation: Based on entity classes
• HQL support: Object-oriented query language
• Caching: First and second level caching

Mnemonic: "Config-Factory-Session-Transaction: CFST"

Question 3(a) [3 marks]

Describe various features of Servlet.

Answer:

Table: Servlet Features

Key Features:

• Server-side processing: Handles client requests
• Protocol independent: HTTP, FTP, SMTP support
• Extensible: Can be extended easily
• Portable: Write once, run anywhere

Mnemonic: "Platform Performance Robust Secure"

Question 3(b) [4 marks]

Explain Servlet life cycle.

Answer:

Life Cycle Stages:

Table: Servlet Life Cycle

Method Details:

• init(): Called once when servlet loads
• service(): Called for each request
• destroy(): Called when servlet unloads

Mnemonic: "Load-Create-Init-Service-Destroy"

Question 3(c) [7 marks]

Explain the session tracking in Servlet with example.

Answer:

Session Tracking Methods:

Table: Session Tracking Techniques

HttpSession Example:

Java

Session Management:

• Creation: request.getSession()
• Storage: session.setAttribute()
• Retrieval: session.getAttribute()
• Invalidation: session.invalidate()

Mnemonic: "Cookies-URLs-Hidden-HttpSession: CUHS"

Question 3(a) OR [3 marks]

Explain methods of Servlet life cycle.

Answer:

Life Cycle Methods:

Table: Servlet Life Cycle Methods

Method Details:

• init(ServletConfig config): Initialization code, database connections
• service(req, res): Request handling, business logic
• destroy(): Cleanup code, close resources

Example:

Java

Mnemonic: "Init-Service-Destroy: ISD"

Question 3(b) OR [4 marks]

Describe HTTPSERVLET class with example.

Answer:

HttpServlet Class: Abstract class extending GenericServlet, specifically for HTTP protocol.

HTTP Methods:

Table: HttpServlet Methods

Example:

Java

Key Features:

• HTTP-specific: Designed for web applications
• Method handling: Separate methods for different HTTP verbs
• Request/Response: HttpServletRequest and HttpServletResponse

Mnemonic: "Get-Post-Put-Delete: GPPD"

Question 3(c) OR [7 marks]

Differentiate GET and POST methods and write a java code to develop Servlet using POST method.

Answer:

Table: GET vs POST Comparison

POST Method Servlet Example:

Java

HTML Form:

HTML

Key Differences:

• GET: Data in URL, visible, limited size
• POST: Data in body, hidden, unlimited size

Mnemonic: "GET Grabs, POST Protects"

Question 4(a) [3 marks]

List JSP Implicit Objects and explain any two.

Answer:

JSP Implicit Objects List:

1. request (HttpServletRequest)
2. response (HttpServletResponse)
3. session (HttpSession)
4. application (ServletContext)
5. out (JspWriter)
6. page (Object)
7. pageContext (PageContext)
8. config (ServletConfig)
9. exception (Throwable)

Detailed Explanation:

request Object:

• Type: HttpServletRequest
• Purpose: Access request data and parameters
• Example: String name = request.getParameter("name");

session Object:

• Type: HttpSession
• Purpose: Store user-specific data across requests
• Example: session.setAttribute("user", username);

Mnemonic: "Request Response Session Application Out"

Question 4(b) [4 marks]

Explain features of JSP.

Answer:

Table: JSP Features

Key Features:

• Separation of Concerns: Design and logic separated
• Extensible: Custom tags and libraries
• Compiled: Translated to servlets for performance
• Expression Language: Simplified syntax

JSP Elements:

• Directives: <%@ %>
• Declarations: <%! %>
• Expressions: <%= %>
• Scriptlets: <% %>

Mnemonic: "Easy Platform Component Secure"

Question 4(c) [7 marks]

Describe how to call JSP from servlet with example.

Answer:

Methods to Call JSP from Servlet:

Table: JSP Calling Methods

Forward Example:

Servlet Code:

Java

JSP Code (display.jsp):

jsp

Steps:

1. Process data in servlet
2. Set attributes in request
3. Get RequestDispatcher with JSP path
4. Forward to JSP

Mnemonic: "Process-Set-Get-Forward: PSGF"

Question 4(a) OR [3 marks]

List and explain JSP scripting elements.

Answer:

Table: JSP Scripting Elements

Detailed Explanation:

Directives:

• Page directive: Import packages, set content type
• Include directive: Include other files
• Taglib directive: Custom tag libraries

Declarations:

• Define instance variables and methods
• Become part of servlet class

Mnemonic: "Direct Declare Express Script"

Question 4(b) OR [4 marks]

Explain JSP life cycle.

Answer:

Life Cycle Phases:

Table: JSP Life Cycle

Key Points:

• Translation: JSP engine converts JSP to servlet
• Compilation: Java compiler creates .class file
• Execution: Servlet container executes compiled servlet

Mnemonic: "Translate-Compile-Init-Service-Destroy"

Question 4(c) OR [7 marks]

Define cookie. Explain working of cookie with example.

Answer:

Cookie Definition: A cookie is a small piece of data stored on the client's computer by the web browser while browsing a website.

Cookie Working Process:

Table: Cookie Attributes

Cookie Example:

Creating Cookie (Servlet):

Java

Reading Cookie (Servlet):

Java

Cookie Benefits:

• User personalization: Remember preferences
• Session tracking: Maintain state
• Analytics: Track user behavior

Mnemonic: "Create-Set-Add-Read: CSAR"

Question 5(a) [3 marks]

Write difference between JSP and Servlet.

Answer:

Table: JSP vs Servlet Comparison

Key Differences:

• JSP: Better for presentation, easier for web designers
• Servlet: Better for business logic, more control
• Coding: JSP mixes HTML and Java, Servlet is pure Java
• Compilation: JSP auto-compiles, Servlet needs manual compilation

Mnemonic: "JSP for Presentation, Servlet for Logic"

Question 5(b) [4 marks]

Define Spring Boot and explain its advantages.

Answer:

Spring Boot Definition: Spring Boot is a framework that simplifies the development of Spring-based applications by providing auto-configuration and embedded servers.

Table: Spring Boot Advantages

Key Features:

• Rapid Development: Minimal configuration required
• Microservices: Perfect for microservice architecture
• No XML: Convention over configuration
• Cloud Ready: Easy deployment to cloud platforms

Example:

Java

Mnemonic: "Auto Embedded Starter Production"

Question 5(c) [7 marks]

Explain the architecture of Spring framework.

Answer:

Architecture Layers:

Table: Spring Framework Modules

Core Concepts:

• IoC (Inversion of Control): Framework controls object creation
• DI (Dependency Injection): Dependencies injected automatically
• AOP (Aspect-Oriented Programming): Modular cross-cutting concerns
• MVC: Model-View-Controller pattern

Spring Container:

• BeanFactory: Basic container
• ApplicationContext: Advanced container with additional features

Configuration Methods:

• XML Configuration: Traditional approach
• Annotation Configuration: Modern approach
• Java Configuration: Type-safe configuration

Mnemonic: "Core Data Web AOP Test"

Question 5(a) OR [3 marks]

Write advantages of JSP over Servlet.

Answer:

Table: JSP Advantages over Servlet

Key Advantages:

• Separation of Design and Logic: HTML and Java separated
• Rapid Development: Faster prototyping and development
• Less Code: No need for out.println() statements
• Built-in Objects: Implicit objects readily available

Example Comparison:

JSP Code:

jsp

Servlet Code:

Java

Mnemonic: "Easy Auto Designer Maintenance"

Question 5(b) OR [4 marks]

Explain the advantages of Spring Boot.

Answer:

Table: Spring Boot Advantages

Detailed Advantages:

1. Auto Configuration:

• Automatically configures Spring application based on dependencies
• Reduces boilerplate configuration code
• Convention over configuration approach

2. Embedded Servers:

• No need for external application servers
• Easy to run applications with java -jar
• Simplified deployment process

3. Starter Dependencies:

• Pre-configured dependency sets
• Version compatibility managed
• Quick project setup

4. Production Features:

• Health endpoints
• Metrics collection
• Application monitoring

Example:

Java

Mnemonic: "Auto Embedded Starter Production"

Question 5(c) OR [7 marks]

Explain MVC architecture.

Answer:

MVC (Model-View-Controller) Architecture:

MVC Components:

Table: MVC Components

Detailed Explanation:

Model:

• Represents data and business logic
• Database operations
• Data validation
• Business rules implementation

View:

• Presentation layer
• User interface components
• Display data to users
• Collect user input

Controller:

• Handles user requests
• Coordinates between Model and View
• Process user input
• Select appropriate View

MVC Flow:

Spring MVC Example:

Controller:

Java

Model:

Java

View (JSP):

jsp

MVC Advantages:

• Separation of Concerns: Clear separation of responsibilities
• Maintainability: Easy to maintain and modify
• Reusability: Components can be reused
• Testability: Each component can be tested independently
• Parallel Development: Different teams can work on different components

MVC in Web Applications:

• Model: Database entities, business logic
• View: JSP pages, HTML templates
• Controller: Servlets, Spring controllers

Design Patterns Used:

• Front Controller: Single entry point for requests
• Observer Pattern: Model notifies View of changes
• Strategy Pattern: Different Views for same Model

Mnemonic: "Model manages data, View shows data, Controller controls flow"