Fundamentals of Software Development (4331604) - Summer 2025 Solution

Question 1(a) [3 marks]

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Give IEEE definition of software. Write one example of each for application and system software.

Answer:

IEEE Definition: Software is a collection of computer programs, procedures, rules, and associated documentation and data.

Examples:

• Application software: Programs designed for end-users to accomplish specific tasks
• System software: Programs that manage and operate computer hardware

Mnemonic: “Apps help Users, Systems help Hardware”

Question 1(b) [4 marks]

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Write a short note on data dictionary.

Answer:

Data dictionary is a centralized repository containing definitions and characteristics of data elements used in a system.

Components Table:

• Purpose: Ensures consistency in data usage across development team
• Benefits: Reduces ambiguity, improves communication, standardizes data definitions
• Usage: Referenced during system design and database creation

Mnemonic: “Dictionary Defines Data Clearly”

Question 1(c) [7 marks]

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Explain prototype model with figure.

Answer:

Prototype model is an iterative approach where a working model is built early to understand requirements better.

Diagram:

graph TD
    A[Requirement Gathering] --> B[Quick Design]
    B --> C[Build Prototype]
    C --> D[User Evaluation]
    D --> E{User Satisfied?}
    E -->|No| F[Refine Requirements]
    F --> B
    E -->|Yes| G[Final System Development]
    G --> H[Testing & Maintenance]

Characteristics:

• Advantages: Early user feedback, reduced development risk, better requirement understanding
• Disadvantages: May lead to inadequate analysis, customer expects prototype as final product
• Best for: Projects with unclear requirements

Mnemonic: “Prototype Proves Possibilities”

Question 1(c) OR [7 marks]

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Explain RAD model with advantages and disadvantages.

Answer:

RAD (Rapid Application Development) emphasizes quick development through prototyping and iterative development.

RAD Phases:

graph LR
    A[Business Modeling] --> B[Data Modeling]
    B --> C[Process Modeling]
    C --> D[Application Generation]
    D --> E[Testing & Turnover]

Advantages vs Disadvantages:

• Key feature: Uses automated tools and 4GL programming
• Timeline: Typically 60-90 days for development
• Team: Small, experienced development teams

Mnemonic: “RAD Rapidly Accelerates Development”

Question 2(a) [3 marks]

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Give the full form of following: SQA, FTR, RAD, BVA, GUI, DFD

Answer:

Mnemonic: “Software Quality And Formal Technical Reviews Rapidly Analyze Development, Boundary Value Analysis Guides User Interface, Data Flow Diagrams”

Question 2(b) [4 marks]

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Define agile methodology. Discuss agile principles.

Answer:

Definition: Agile is an iterative software development approach emphasizing collaboration, flexibility, and rapid delivery of working software.

Core Agile Principles:

• Iteration length: Typically 2-4 weeks (sprints)
• Delivery: Frequent working software releases
• Team structure: Cross-functional, self-organizing teams

Mnemonic: “Agile Adapts And Advances”

Question 2(c) [7 marks]

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Explain XP model with its advantages and disadvantages.

Answer:

XP (Extreme Programming) is an agile methodology emphasizing engineering practices and customer satisfaction.

XP Practices:

mindmap
  root((XP Practices))
    Planning Game
    Small Releases
    Pair Programming
    Test-Driven Development
    Continuous Integration
    Refactoring
    Simple Design
    Collective Code Ownership

Advantages and Disadvantages:

• Key practice: Pair programming ensures code quality
• Testing: Test-first approach with automated testing
• Customer role: On-site customer provides continuous feedback

Mnemonic: “eXtreme Programming eXcels through Practices”

Question 2(a) OR [3 marks]

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Define black box testing. Give at least two names of black box testing method.

Answer:

Definition: Black box testing examines software functionality without knowledge of internal code structure, focusing on input-output behavior.

Black Box Testing Methods:

• Approach: Tests based on requirements and specifications
• Tester knowledge: No internal code knowledge required
• Focus: External behavior and functionality

Mnemonic: “Black Box Behavior Based”

Question 2(b) OR [4 marks]

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Give the full form of CLI. Explain CLI in brief.

Answer:

CLI: Command Line Interface

CLI Characteristics:

• Advantages: Fast execution, less memory usage, scriptable
• Disadvantages: Requires learning commands, not user-friendly for beginners
• Examples: Windows Command Prompt, Linux Terminal, DOS

Mnemonic: “Commands Lead Interaction”

Question 2(c) OR [7 marks]

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Explain waterfall model with neat figure.

Answer:

Waterfall model is a linear sequential approach where each phase must be completed before moving to the next.

Waterfall Model Diagram:

graph TD
    A[Requirement Analysis] --> B[System Design]
    B --> C[Implementation]
    C --> D[Integration & Testing]
    D --> E[Deployment]
    E --> F[Maintenance]
    
    style A fill:#e1f5fe
    style B fill:#f3e5f5
    style C fill:#fff3e0
    style D fill:#f1f8e9
    style E fill:#fce4ec
    style F fill:#fff8e1

Phase Details:

• Advantages: Simple, easy to manage, well-documented
• Disadvantages: Inflexible, late testing, difficult to accommodate changes

Mnemonic: “Water Always Flows Downward”

Question 3(a) [3 marks]

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Give one word answer:

Answer:

Mnemonic: “Coincidental Cohesion, Content Coupling, Critical Zero”

Question 3(b) [4 marks]

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Explain classification of coupling.

Answer:

Coupling measures interdependence between modules. Lower coupling is better for maintainability.

Coupling Types (Best to Worst):

• Best practice: Aim for data coupling
• Avoid: Content and common coupling
• Design goal: Minimize dependencies between modules

Mnemonic: “Data Stamps Control External Common Content”

Question 3(c) [7 marks]

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Define following terms (don’t just give the full form):

Answer:

• Verification: “Are we building the product right?”
• Validation: “Are we building the right product?”
• Key difference: Verification checks specifications, Validation checks user satisfaction

Mnemonic: “Users Interact, Software Engineers Plan, Managing Cycles, Specifications Define, Verification checks Requirements, Validation checks Satisfaction, Requirements Specify Software”

Question 3(a) OR [3 marks]

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Explain menu based UI with advantages and disadvantages.

Answer:

Menu-based UI presents options in hierarchical menus for user selection.

Advantages vs Disadvantages:

• Structure: Hierarchical organization of options
• Navigation: Point-and-click or keyboard shortcuts
• Best for: Applications with well-defined functions

Mnemonic: “Menus Make Choices Clear”

Question 3(b) OR [4 marks]

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Explain classification of cohesion.

Answer:

Cohesion measures how closely related elements within a module are. Higher cohesion is better.

Cohesion Types (Best to Worst):

• Goal: Achieve functional cohesion
• Design principle: Each module should have single responsibility
• Measurement: Higher cohesion = better design

Mnemonic: “Functional Sequences Communicate Procedures Temporally through Logical Coincidence”

Question 3(c) OR [7 marks]

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Define risk. Explain risk management.

Answer:

Risk Definition: Potential problem that may occur during software development, causing negative impact on project success.

Risk Management Process:

graph LR
    A[Risk Identification] --> B[Risk Assessment]
    B --> C[Risk Prioritization]
    C --> D[Risk Mitigation]
    D --> E[Risk Monitoring]
    E --> A

Risk Management Activities:

• Risk types: Technical, Project, Business risks
• Strategies: Avoid, Transfer, Mitigate, Accept
• Tools: Risk matrices, probability-impact charts

Mnemonic: “Risk Requires Careful Planning”

Question 4(a) [3 marks]

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Define: Error, Failure, Test case

Answer:

• Relationship: Error leads to defect, defect causes failure
• Error source: Developer mistakes, misunderstanding requirements
• Test case components: Input, expected output, execution steps

Mnemonic: “Errors Cause Failures, Tests Catch Problems”

Question 4(b) [4 marks]

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Identify any six functional requirements of ATM system.

Answer:

ATM System Functional Requirements:

• Security: All transactions require authentication
• Validation: Check sufficient balance before withdrawal
• Logging: Record all transactions for audit

Mnemonic: “ATMs Authenticate, Balance, Cash, Transfer, History, PIN”

Question 4(c) [7 marks]

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State the use of activity network diagram. Develop activity network diagram for the following system and find the critical path for the same.

Answer:

Activity Network Diagram Uses:

• Project scheduling: Determine project timeline
• Critical path identification: Find longest path determining minimum project duration
• Resource planning: Optimize resource allocation

Activity Network Diagram:

Critical Path Analysis:

Critical Path: B→C→E→G→H (16 days) Project Duration: 16 days

Mnemonic: “Networks Navigate Project Paths”

Question 4(a) OR [3 marks]

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Explain any three requirement gathering activities.

Answer:

Requirement Gathering Activities:

• Purpose: Understand user needs and system expectations
• Participants: Users, customers, domain experts, developers
• Documentation: All findings recorded in SRS document

Mnemonic: “Interviews, Questions, Documents Gather Requirements”

Question 4(b) OR [4 marks]

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Develop use case diagram for Bank ATM system.

Answer:

ATM Use Case Diagram:

graph TB
    Customer((Customer))
    Admin((Admin))
    Bank[Bank System]
    
    Customer --> UC1[Check Balance]
    Customer --> UC2[Withdraw Cash]
    Customer --> UC3[Transfer Funds]
    Customer --> UC4[Change PIN]
    Customer --> UC5[Print Receipt]
    
    Admin --> UC6[Load Cash]
    Admin --> UC7[View Logs]
    Admin --> UC8[Maintenance]
    
    UC1 -.-> Bank
    UC2 -.-> Bank
    UC3 -.-> Bank
    UC4 -.-> Bank

Use Case Details:

Mnemonic: “Customers Use ATMs, Admins Maintain Systems”

Question 4(c) OR [7 marks]

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Draw the figure of spiral model. Explain it in brief.

Answer:

Spiral Model Diagram:

graph TB
    subgraph "Spiral Model"
        A[Planning] --> B[Risk Analysis]
        B --> C[Engineering]
        C --> D[Customer Evaluation]
        D --> A
        
        A1[Plan 1] --> B1[Risk 1]
        B1 --> C1[Code 1]
        C1 --> D1[Test 1]
        D1 --> A2[Plan 2]
        A2 --> B2[Risk 2]
        B2 --> C2[Code 2]
        C2 --> D2[Test 2]
    end

Spiral Model Characteristics:

• Key feature: Risk-driven approach with iterative development
• Best for: Large, complex, high-risk projects
• Advantages: Risk management, flexible, incremental development
• Disadvantages: Complex management, expensive, requires risk expertise

Mnemonic: “Spirals Plan, Risk, Engineer, Evaluate”

Question 5(a) [3 marks]

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State TRUE or FALSE for the following.

Answer:

• Critical path: Longest duration path in project network
• CPM: Critical Path Method identifies project bottlenecks
• Risk strategies: Avoid, Transfer, Mitigate, Accept (choice depends on context)

Mnemonic: “True Networks, False Shortest, False Best”

Question 5(b) [4 marks]

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Identify the differences between traditional model approach and agile approach. (at least 4 differences)

Answer:

Traditional vs Agile Comparison:

• Traditional: Predictive, sequential approach
• Agile: Adaptive, iterative approach
• Flexibility: Agile more responsive to changing requirements

Mnemonic: “Traditional Plans Heavy, Agile Adapts Light”

Question 5(c) [7 marks]

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Define unit testing. Draw the figure of it. Explain the process of unit testing.

Answer:

Unit Testing Definition: Testing individual software components or modules in isolation to verify they function correctly according to design specifications.

Unit Testing Process:

graph TD
    A[Select Unit] --> B[Design Test Cases]
    B --> C[Set Up Test Environment]
    C --> D[Execute Tests]
    D --> E[Record Results]
    E --> F{All Tests Pass?}
    F -->|No| G[Debug and Fix]
    G --> D
    F -->|Yes| H[Unit Approved]

Unit Testing Process Steps:

• Benefits: Early defect detection, easier debugging, improved code quality
• Tools: JUnit, NUnit, automated testing frameworks
• Coverage: Aim for high code coverage (statements, branches, paths)

Mnemonic: “Units Test Individual Components Thoroughly”

Question 5(a) OR [3 marks]

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Give the full form of the following.

Answer:

Mnemonic: “Activities On Arrows, Programs Evaluate Review Techniques, Earned Values Analyzed, Critical Paths Managed, Work Broken Structured, Projects Managed Controlled”

Question 5(b) OR [4 marks]

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Explain code inspection.

Answer:

Code inspection is a systematic examination of source code by team members to identify defects and ensure quality standards.

Code Inspection Process:

• Benefits: Early defect detection, knowledge sharing, improved code quality
• Roles: Author, Moderator, Reviewers, Recorder
• Focus areas: Logic errors, coding standards, maintainability

Mnemonic: “Inspections Improve Code Quality”

Question 5(c) OR [7 marks]

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Define white box testing method. Explain different white box testing methods.

Answer:

White Box Testing Definition: Testing method that examines internal code structure, logic paths, and implementation details to ensure thorough coverage.

White Box Testing Methods:

Testing Techniques:

mindmap
  root((White Box Testing))
    Statement Testing
      Line Coverage
      Code Execution
    Branch Testing
      Decision Points
      True/False Paths
    Path Testing
      All Routes
      Loop Testing
    Condition Testing
      Boolean Logic
      Multiple Conditions

Coverage Analysis:

• Tools: Code coverage analyzers, debugging tools
• Advantages: Thorough testing, identifies dead code, ensures quality
• Disadvantages: Requires code knowledge, time-consuming, may miss requirement gaps

Mnemonic: “White Box Sees Inside Code Structure”