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What is a generic method and when should it be used C#?
Generics allow you to define the specification of the data type of programming elements in a class or a method, until it is actually used in the program. In other words, generics allow you to write a class or method that can work with any data type.
What is Generics in C# Interview Questions?
A: Generic is a class that enables you to define classes as well as methods by using a placeholder. Generics were part of version 2.0 of the C#. The intention of using Generic is to enable type to be a parameter to classes, methods, and interfaces.
What is false constructor?
What is false about constructor? Explanation: The constructor cannot have a return type. It should create and return new objects. Explanation: Constructor returns a new object with variables defined as in the class.
Can a generic method be called with different types?
You can write a single generic method declaration that can be called with arguments of different types. Based on the types of the arguments passed to the generic method, the compiler handles each method call appropriately. Following are the rules to define Generic Methods −
How to use generic method declarations in Java?
The way to do deal with these problems is to use generic methods. Just like type declarations, method declarations can be generic—that is, parameterized by one or more type parameters. We can call this method with any kind of collection whose element type is a supertype of the element type of the array.
Do you have to pass type argument to generic method?
Notice that we don’t have to pass an actual type argument to a generic method. The compiler infers the type argument for us, based on the types of the actual arguments. It will generally infer the most specific type argument that will make the call type-correct.
How to perform a generic type invocation in Java?
You can perform a generic type invocation, passing Number as its type argument, and any subsequent invocation of add will be allowed if the argument is compatible with Number: Now consider the following method: public void boxTest (Box n) { /* */ }