Object Oriented Programming Quiz

Example Questions From the Test

• 1You need to add logging or caching around a service at runtime without creating many subclasses or changing the service implementation. Which pattern is the best fit?
  • Singleton
  • Factory Method
  • Template Method
  • Decorator
• 5What is a constructor primarily responsible for in a well-designed class?
  • Establishing the object's initial state and required dependencies
  • Choosing which overridden method will run at compile time
  • Granting every other class direct access to internal fields
  • Destroying the object when it is no longer referenced
• 6An OrderService directly creates and uses a SqlOrderRepository. Which change best follows the dependency inversion principle?
  • Make OrderService depend on an injected repository abstraction
  • Move all OrderService methods into SqlOrderRepository
  • Create the repository in a static global variable
  • Let SqlOrderRepository inherit from OrderService