700+ câu trắc nghiệm Ngôn ngữ lập trình C có đáp án - Phần 18

It is not necessary to initialize a reference to real object when it is declared.

There can be a null reference.

One can reassign reference after it is initialized.

It is nothing wrong that a function returning a reference to an automatic variable.

One can apply pointer arithmetic with reference variables.

The preprocessor processes source code before the compiler does.

A class is a basic unit of object-oriented programming.

A function template defines a parameterized nonmember function, which enables a program to call the same function with different types of arguments.

Destructors can be overloaded.

Static data members cannot be private.

Static member functions can use this pointer.

One cannot use enumerations in a class.

One cannot create an object of a virtual class.

A class that builds a linked list should destroy the list in the class destructor.

Once an exception has been thrown, it is not possible for the program to jump back to the throw point.

In C++, only one catch block can handle all the exceptions.

There can be only one catch block in a program.

When an exception if throw, but not caught, the program ignores the error.

A class object passed to a function template must overload any operators used on the class object by the template.

In the function template definition it is not necessary to use each type parameter declared in the template prefix.

It is possible to overload a function template and an ordinary (non-template) function.

A class template may not be used as a base class.

When declaring an iterator from the STL, the compiler automatically creates the right kind, depending upon the container it is used with.

‘ios’ stream is derived from iostream.

What is the output of the following code? #include using namespace std; int main() { int a = 20; int &n = a; n = a++; a = n++; cout << a << "," << n << endl; system("pause"); }