WGU D480 ITSW 3151 Software Design & Quality Assurance Final Assessment (Qns & Ans) 2026

WGU D480 ITSW 3151 Software Design & Quality Assurance Final Assessment (Qns & Ans) 2026

1. Which design pattern is primarily used to control instantiation
   of objects to ensure a single instance?
    - A) Factory Pattern
    - B) Singleton Pattern
    - C) Observer Pattern
    - D) Builder Pattern
    ANS: B) Singleton Pattern
    Rationale: The Singleton Pattern restricts the instantiation of
   a class to one object, ensuring a single instance is managed.
   2. What does the acronym SOLID stand for in software design
   principles?
    - A) Single Responsibility, Open/Closed, Liskov Substitution,
   Interface Segregation, Dependency Inversion
    - B) Static, Object-oriented, Loop, Interface, Dynamic
    - C) Service-oriented, Loose coupling, Interface segregation,
   Design patterns
    - D) None of the above
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