DIT 077 OBJECT ORIENTED PROGRAMMING

 DIT 077 OBJECT ORIENTED PROGRAMMING

QUESTION ONE (24 MARKS)

a)    Define the following terms as used in object oriented programming

                               i.            Inheritance                                                                                     (2 marks)

                             ii.            Abstraction                                                                                     (2 marks)

                          iii.            Encapsulation                                                                                (2 marks)

                           iv.            Polymorphism                                                                               (2 marks)

                             v.            Constructor                                                                                                (2 marks)

                           vi.            Object                                                                                               (2 marks)

b)     

                               i.            Differentiate between method overloading and method overriding as applied in java programming.                                              (4 marks)

                             ii.            State any four applications of java programming language (4 marks)

                          iii.            Differentiate default and parameterized constructors    (4 marks)

 

QUESTION TWO (18 MARKS)

a)    State four differences between a java method and a java constructor.                                                                                                                                (4 marks)

b)    Using diagrams, explain any three types of inheritance.           (6 marks)

c)     Write a complete java application to prompt the user for the radius of a sphere, and call method sphereVolume to calculate and display the volume of the sphere. Use the following statement to calculate volume: (4.0/3.0) * Math.PI * Math.pow(radius, 3)                           (8 marks)

 

QUESTION THREE (18 MARKS)

a)     

                               i.            State the four access specifiers used in java programs    (4 marks)

                             ii.            Using a for loop write a java program to output number 1 to 20                                                                                                                     (6 marks)

b)    Write a java program snippet that implements java method overloading.                                                                                                              (8 marks)

           

QUESTION FOUR (18 MARKS)

a)    Outline four areas that distinguishes an inheritance from a java class                                                                                                                                 (4 marks)

b)    Distinguish between aggregation “has-a” and Generalization “is-a” relationship using well labeled diagrams.                                        (6 marks)

c)     Write a java program that calculates the area of a circle using a java method.                                                                                                      (8 marks)

 

QUESTION FIVE (18 MARKS)

a)    Give any four features of object oriented languages.                   (4 marks)

b)    Differentiate between a formal and actual parameter                (4 marks)

c)     Write a java program that implements inheritance to calculate the area of triangle and rectangle as shown in the diagram below.  (10 marks)