Are Delegates Type-Safe?

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..

Which operator is used to remove a delegate?

The “-” operator can be used to remove a component delegate from a composed delegate.

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

Which one of the following is the most appropriate syntax of declaring 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);

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);

What is delegate in Java?

Delegation means that you use an object of another class as an instance variable, and forward messages to the instance. … Delegation can be viewed as a relationship between objects where one object forwards certain method calls to another object, called its delegate.

What is the difference between events and multicast delegates?

Delegates are pointer to functions and used for call back. Multicast delegates help to invoke multiple callbacks. Events encapsulate delegate and implement publisher and subscriber model. … So delegate is the base for events and multicast.

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.

Which is true 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.

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.

Is a delegate?

A delegate is a person selected to represent a group of people in some political assembly of the United States. There are various types of delegates elected to different political bodies.

Can we overload delegate?

Types cannot be overloaded and delegates are types. Only methods can be overloaded. Properties too, but properties are just a pretty face on methods underneath anyway.

What is the point of delegates?

The primary purpose of delegates is to vote on a party’s candidate for primary and general elections.

What is a delegate type?

A delegate is a type that represents references to methods with a particular parameter list and return type. … In other words, a method must have the same return type as the delegate. This ability to refer to a method as a parameter makes delegates ideal for defining callback methods.

Which is the correct statement to find if contents of two strings are equal?

7. Correct way to find if contents of two strings are equal? Explanation: “==” operator used to compare length of two strings and strcmp() is the inbuilt method derived from string class.

Which of the following is the necessary condition for implementing delegates *?

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

Why delegates why not call methods directly?

Because it uses a delegate to specify the filter, the Where function is extremely flexible. You don’t need different Where functions to filter odd numbers and prime numbers, for example. The calling syntax is also very concise, which would not be the case if you used an interface or an abstract class.

What is a delegate in C# explain with one example?

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. Simple Delegates With Examples. … Delegates can be chained together; for example, multiple methods can be called on a single event.

What is difference between events and delegates?

Delegate is a function pointer. It holds the reference of one or more methods at runtime. Delegate is independent and not dependent on events. An event is dependent on a delegate and cannot be created without delegates.

When would you use delegates instead of interfaces?

When should Delegate be used in place of InterfaceIf Interface defines only a single method then we should use Delegate.If multicast is required.If subscriber need to implement the interface multiple times.Oct 28, 2015

Which control the accessibility of the delegate?

The public , protected , internal , and private modifiers control the accessibility of the delegate type.

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