Which programming paradigm binds data and the functions that manipulate it together into a single unit to prevent unauthorized outside access?
Option A is correct. Object-Oriented Programming (OOP) binds data and code together via Encapsulation, protecting object internal state from outside direct modification.
Which OOP concept allows a subclass to inherit attributes and methods from a parent class?
Option B is correct. Inheritance allows a derived class to inherit member variables and functions from a base class, promoting code reusability.
What is the primary purpose of data abstraction in Object-Oriented Programming?
Option C is correct. Abstraction hides complex background implementation details and exposes only essential interfaces to the outside world.
In C++, which keyword is used to declare a virtual function in a base class to enable runtime polymorphism?
Option A is correct. The 'virtual' keyword in a base class function declaration instructs the compiler to perform dynamic (runtime) binding using a VTABLE.
What type of function is defined as 'virtual void display() = 0;' inside a C++ class declaration?
Option B is correct. A virtual function assigned to zero (= 0) is a Pure Virtual Function, which turns the containing class into an Abstract Class.