What is the purpose of using a delegate in the context of .NET Framework 4.0?

Question

Options

• ATo provide identical member methods and properties from numerous associated classes
• BTo copy member methods and properties from an existing class
• CTo generate an additional thread to provide parallel processing
• DTo enable an assembly to respond to an event that takes place inside a class

• A
  9% (3)
• B
  3% (1)
• C
  16% (5)
• D
  72% (23)

Explanation

An assembly declares a delegate when it needs to respond to an event that takes place inside a class. A delegate is a form of type-safe function pointer used by the .NET Framework. It specifies a method to call and optionally an object to call the method on. It is used, among other things, to implement callbacks and event listeners. It encapsulates a reference to a method inside a delegate object. The delegate object can then be passed to code which can call the referenced method, without having to know at compile time which method will be invoked. Answer: C is incorrect. Delegates are not related to threading. Answer: A is incorrect. Interfaces provide identical members from numerous associated classes, Answer: B is incorrect. Inheritance copies members from an existing class, not a delegate.

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