CBSE Class 12 Computers Classes And Objects Worksheet

1. A class is defined without any data member. What is the size of the class?

2. List the various access‐specifiers of a class. Explain each w.r.t. their visibility.

3. How is a member function different from an ordinary function?

4. Declare and define class Student having the following members:
Private members :
Student Roll No. ‐ integer
Student Name ‐ 20 characters
Student Age ‐ integer
Student Marks – Float array for eng, maths, science
Ctotal() ‐ Funciton to calculate eng+maths+science
Public members:
Takedata() ‐ To read all data members and invoke the function Ctotal()
Showdata() ‐ To display all data members

5. Explain the concepts of OOPs w.r.t. the above class.

6. What are inline functions? Explain the concept of inline for member and non‐member functions.

7. What is wrong with this – Class C {public: int x=0;};

8. Time is a class with the following data members and member function:
Data members: hours(int), minutes(int), seconds(int)
Member functions: to read values, to calculate the difference between two times, to display time
Complete the program with the declarations and definitions. Read a time in main() and pass it to the function to find the difference.

9. Declare and define class Applicant having the following members:
Private members :
Admission No. ‐ long
Name ‐ 20 characters
Aggregate marks ‐ Float
Grade – Char
GradeMe() ‐ Funciton to find Grade as per Aggregate marks as follows:
Aggregate Marks Grade
>=80                                   A
Less than 80 and >=65      B
Less than 65 and >=50 C 50 D
Public members:
ENTER() ‐ To read all data members and invoke the function GradeMe()
RESULT() ‐ To display all data members

10. Rewrite the given code after correcting all the errors:
Class X{
   int a;
  static int c;
  public:
  void initial(void) {
     a = c = 0;
     }
     static void call() {
     cout<<c<<a;
     }
}