Object Oriented Programming Practice Test 1

1. If data members are private, what can we do to access them from the class object?

Create private member functions to access those data members

Create protected member functions to access those data members

Private data members can never be accessed from outside the class

Create public member functions to access those data members

2. What is output of the following program?

class student
{ 
    public : int marks; 
	void disp() 
	{ 
		cout<<”its base class”
	};
	class topper:public student
	{
		public : 
		void disp()
		{ 
			cout<<”Its derived class”; 
		}
	}
	void main() { student s; topper t;
	s.disp();
	t.disp();
}

Its derived class Its base class

Its base classIts derived class

Its base class Its derived class

Its derived classIts base class

3. Which among the following can be viewed as combination of abstraction of data and code.

Inheritance

Class

Interfaces

Object

4. Class is _________ abstraction.

Logical

Real

Hypothetical

Object

5. Which type of function among the following shows polymorphism?

Inline function

Virtual function

Undefined functions

Class member functions

6. Abstraction can apply to ____________

Only control

Control and data

Classes

Only data

7. Which among the following would destroy the encapsulation mechanism if it was allowed in programming?

Using access declaration for public members of base class

Using access declaration for private members of base class

Using access declaration for local variable of main() function

Using access declaration for global variables

8. How can Encapsulation be achieved?

Using Abstraction

Using Access Specifiers

Using only private members

Using inheritance

9. Class with main() function can be inherited.

False

True

10. In case of using abstract class or function overloading, which function is supposed to be called first?

Local function

Function with highest priority in compiler

Function with lowest priority because it might have been halted since long time, because of low priority

Global function