Which of the following class represent an abstract class? (points : 2) class automobile {
void drive();
}
class automobile {
void drive ()=0;
}
class automobile {
virtual void drive ()=0;
}
class automobile {
void drive (){}
}

class Automobile {

virtual void drive ()=0;

}

Explanation:

In C++, an abstract class is one which cannot be instantiated. However it can be subclassed. A  class containing a pure virtual function is considered an abstract class. A virtual function is preceded by the virtual keyword. For example:

virtual void drive();

In addition , if a virtual function is pure, it is indicated using ' = 0 ;' syntax.

For example:

virtual void drive() = 0;

Of the given options:

class Automobile {

virtual void drive ()=0;

}

represents an abstract class.