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25-Comp-B11 Advanced Software Design: May 2015

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Waterfall vs. Spiral Model
  2. Question 2 Functional and Non-Functional Requirements
  3. Question 3 Quantifiable Non-Functional Requirements
  4. Question 4 Use-Case Actors vs. Design Classes (Library Domain)
  5. Question 5 Design Goals in System Design
  6. Question 6 Fault, Error, and Failure
  7. Question 7 Software Reuse
  8. Question 8 Design by Contract vs. Defensive Programming
  9. Question 9 Benefits and Challenges of Design by Contract
  10. Question 10 Precondition, Postcondition, and Class Invariant
  11. Question 11 The Liskov Substitution Principle
  12. Question 12 Invariant Strengthening Under Inheritance
  13. Question 13 Framework, Library, and Design Pattern
  14. Question 14 Two Variants of the Adapter Design Pattern
  15. Question 15 Structural vs. Behavioural Patterns
  16. Question 16 Observer Roles vs. Boundary/Entity Classes
  17. Question 17 Credit-Card Validation — Pattern Selection
  18. Question 18 The Model-View-Controller Architecture
  19. Question 19 Separating Boundary from Entity/Control Classes
  20. Question 20 Design Patterns Paramount to GUI Design
  21. Question 21 Non-Functional Requirements for Human-Machine Interfaces
  22. Question 22 The Open–Closed Principle
  23. Question 23 Encapsulation, Information Hiding, and Message Passing
  24. Question 24 Polymorphism, Dynamic Binding, Overloading, Overriding
  25. Question 25 Friend Functions and Modular Programming
  26. Question 26 Inheritance vs. Delegation
  27. Question 27 Multiple Inheritance in Java

Start with Question 1 →

98-Comp-B11 Advanced Software Design — National Exams, May 2015. 3 hours, closed book exam with one aid sheet allowed (written on both sides), no calculator permitted. The paper is organized into five parts, and candidates were instructed to answer any four (4) questions in Part I, any three (3) in Part II, any three (3) in Part III, any two (2) in Part IV, and any four (4) in Part V — only the first questions answered, in each part, as they appear in the answer book are marked. All questions carry equal weight, so the 16 questions actually marked (4+3+3+2+4 of 27) each count for 100/16 ≈ 6.25% of the paper. All 27 questions are answered below for completeness.

Reference texts: Sommerville, Software Engineering (10th ed., Pearson) — software processes, requirements engineering, agile methods, design principles, dependability; Pressman, Software Engineering: A Practitioner's Approach (9th ed.) — supplementary process and quality coverage; Gamma, Helm, Johnson & Vlissides (GoF), Design Patterns: Elements of Reusable Object-Oriented Software — structural/behavioural pattern catalogue (Adapter, Bridge, Strategy, Observer, Template Method, Composite, etc.); Sebesta, Concepts of Programming Languages (12th ed.) — polymorphism, dynamic binding, inheritance and language-level object semantics; Bertrand Meyer, Object-Oriented Software Construction — design by contract, preconditions/postconditions/invariants, the open–closed principle; Barbara Liskov's 1987 substitutability paper for Question 11; Rogers, Sharp & Preece, Interaction Design, and Nielsen, Usability Engineering, for Question 21's HMI-specific non-functional requirements.

PART I — General Principles (answer any 4 of 7)