Quick Answer: What Is Necessary Condition To Implement Delegates?

Which of the following statement is used to declare a delegate?

Which of the following statements are correct about the delegate declaration given below.

delegate void del(int i); On declaring the delegate a class called del will get created.

The signature of del need not be same as the signature of the method that we intend to call using it..

Are delegates type safe?

A delegate is a type-safe function pointer that can reference a method that has the same signature as that of the delegate. You can take advantage of delegates in C# to implement events and call-back methods. A multicast delegate is one that can point to one or more methods that have identical signatures.

What is a delegate method?

A delegate method is a method that the delegate object is expected to implement. Some delegate methods are required, while some are not. In IOS, most delegates are expected to conform to an Objective-C protocol; the protocol declaration will tell you which methods are optional and which are required.

What is a delegate programming?

In object-oriented programming, delegation refers to evaluating a member (property or method) of one object (the receiver) in the context of another original object (the sender). … The term delegation is also used loosely for various other relationships between objects; see delegation (programming) for more.

What are C# delegates?

C# delegates are similar to pointers to functions, in C or C++. A delegate is a reference type variable that holds the reference to a method. The reference can be changed at runtime. Delegates are especially used for implementing events and the call-back methods. All delegates are implicitly derived from the System.

Which of the following is incorrect about delegates?

Discussion ForumQue.Which of the following is an incorrect statement about delegate?b.delegates could be sharedc.delegates are type safe wrappers for function pointersd.delegate is a value typeAnswer:delegates are type safe wrappers for function pointers1 more row

Can delegates be chained together?

Delegates can be chained together; for example, multiple methods can be called on a single event. Methods don’t have to match the delegate type exactly.

What is the necessary condition to implement delegates?

Discussion ForumQue.To implement delegates, the necessary condition is?b.inheritancec.run time polymorphismd.exceptionsAnswer:class declaration1 more row

How do you create a delegate?

A delegate can be declared using the delegate keyword followed by a function signature, as shown below. The following declares a delegate named MyDelegate . public delegate void MyDelegate(string msg);…There are three steps involved while working with delegates:Declare a delegate.Set a target method.Invoke a delegate.

Which are the correct statement about delegates?

Which of the following statements are correct about delegates? Delegates cannot be used to call a static method of a class. Delegates cannot be used to call procedures that receive variable number of arguments. If signatures of two methods are same they can be called through the same delegate object.

Are based on delegates and are multicast delegates?

It is possible for certain Delegate to hold and invoke multiple methods such Delegates are called Multicast Delegates. Multicast Delegates are also known as Combinable Delegates, which must satisfy the conditions like the return type of the Delegate must be void.

What do you mean by delegates state their use with an example?

A delegate is an object which refers to a method or you can say it is a reference type variable that can hold a reference to the methods. Delegates in C# are similar to the function pointer in C/C++. … For example, if you click an Button on a form (Windows Form application), the program would call a specific method.

How would you write a delegate named ResultCallback with an?

Q44. How would you write a delegate named ResultCallback with an int parameter named responseCodepublic delegate ResultCallback(int responseCode)public delegate void ResultCallback<(int) responseCode>;public void delegate ResultCallback;public delegate void ResultCallback(int responseCode);

Why use delegates over methods?

Delegates are similar to C++ function pointers, but are type safe. Delegates allow methods to be passed as parameters. Delegates can be used to define callback methods. Delegates can be chained together; for example, multiple methods can be called on a single event.

What is multicast delegate in C#?

A Multicast Delegate is a delegate that holds the references of more than one function. When we invoke the multicast delegate, then all the functions which are referenced by the delegate are going to be invoked. If you want to call multiple methods using a delegate then all the method signature should be the same.

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