Question 1:

(a) Explain clearly the following concepts using suitable examples of your own:-

(i) concrete class v/s abstract class
(ii) constructor v/s overloaded constructor
(iii) single inheritance v/s multiple inheritance
(iv) polymorphism v/s data encapsulation

(b) (i) Explain how a static method can be used in a program to access data members?

(ii) Explain how private instance variables of a class can be assigned values?

Question 2:

(a) Write down the abstract class 'BloodDonor' to contain the following:-

(i) integer variable: donor_id
String variables: donor_name, address
double-precision variable: bloodAmount
(ii) set methods for data members: donor_id, donor_name, address
(iii) get methods for all data members
(iv) abstract method 'giveBlood' which returns nothing

(b) Write down the subclass 'Student' to contain the following:-

(i) integer variable: student_id
(ii) set method for the data member
(iii) get method for the data member
(iv) override the abstract method 'giveBlood' to assign a value of 1.0 to the attribute 'bloodAmount'

(c) Write down the subclass 'StaffWorker' to contain the following:-
(i) double-precision variable: salary
(ii) set method for the data member

(iii) get method for the data member
(iv) override the abstract method 'giveBlood' to assign a value of 2.0 to the attribute 'bloodAmount'

(d) Write down an application to perform the following tasks:-
(i) create one 'Student' object and one 'StaffWorker' object
(ii) assign values to the data members of each object
(iii) display all the values