With a template class, _____ type is generic A. no B. exactly one C. at least one D. at most one

The correct answer is: C. at least one

A

template class is a class that can be instantiated with different types. This means that the same template class can be used to create objects of different types. For example, the following template class can be used to create objects of type int, double, or string:

“`c++
template
class MyClass {
public:
T data;

MyClass(T data) : data(data) {}
};
“`

To create an object of type MyClass with data type int, we would use the following syntax:

c++
MyClass<int> myIntClass(10);

To create an object of type MyClass with data type double, we would use the following syntax:

c++
MyClass<double> myDoubleClass(3.14159);

To create an object of type MyClass with data type string, we would use the following syntax:

c++
MyClass<string> myStringClass("Hello, world!");

As you can see, a template class can be instantiated with different types. This is because the type of the data member data is a template parameter. The template parameter is replaced with the actual type when the template class is instantiated.

In the above example, the template parameter T is replaced with the type int when the template class is instantiated to create an object of type MyClass with data type int. The template parameter T is replaced with the type double when the template class is instantiated to create an object of type MyClass with data type double. And the template parameter T is replaced with the type string when the template class is instantiated to create an object of type MyClass with data type string.

Therefore, the answer to the question “With a template class, _____ type is generic” is “at least one”. This is because the template class can be instantiated with different types, and the type of the data member data is a template parameter.