KNEC Diploma in ICT module II Object Oriented Programming past paper: November 2017 Answers

Answers for KNEC Diploma in ICT module II Object Oriented Programming past paper: November 2017

Course Name:  Information and Communication Technology
Also Done By:
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Course Level:  Diploma
Sub Level:       Module II
Course Unit:   Object Oriented Programming
Exam body:    KNEC
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1. List four sample data types used in C++ programs ()
2. Outline two guiding rules for naming variables in C++ programs ()
3. Explain two features of parameterized constructors as used in OOP ()
4. Differentiate between classes and structures as used in OOP ()
5. Explain the term recursive function as used in C++ programs ()
6. Write a C++ programs to that will implement a class named cone with the appropriate dimensions only. The program should accept the dimension and determine and output the volume of cone. Hint: volume= #1/3πr^2#h. ()
7. Explain the procedure of destroying local and global object in the same program ()
8. C++ programming language supports object oriented programming. Outline six features that justify this statement ()
9. Outline four forms of inheritance applied in OOP ()
10. Write a C++ program that will implement a class with the properties in table 1. Use a pointer to access the appropriate members of the class. (6 marks) Feature Description Data member Data structure to store number of votes for six polling stations Member function Function to accept the number of votes for six polling stations, determine and output the total number of votes. Tables 1: Properties ()
11. Outline four components of a loop as used in C++ programs ()
12. Explain the term internal documentation as used in C++ programs ()
13. Outline two uses of program documentation ()
14. A super class named object has the following properties: • Length and width as data member • Constructor Write a C++ program to implement a sub class for the super class. The sub class ha height and a method used to accept the value of height, determine and output the volume. The program should initialize length and width as 7.0 and 5.0 respectively ()
15. Describe a message as applied in OOP. ()
16. Outline four properties of abstract data types (ADT) ()
17. Explain the circumstances under which each of the following features as used in object oriented programming; (i) Virtual base class (ii) Friend function; ()
18. Distinguish between states and behavior as used in OOP ()
19. Write a C++ program that outputs a string of characters from the keyboard to a file ()
20. Outline four benefits of inheritance in application development ()
21. Explain three types of operations that could be carried out on a class ()
22. Distinguish between cohesion and coupling as applied to object ()
23. Write a C++ program that will implement a class containing the dimensions of a rectangle and a parameterized function to initialize the dimensions an object of the class as 12 cm and 5 cm respectively. The program should then pass the object to a function which determines the length of the diagonal. Output the length of the diagonal ()
24. Assuming C++ programming language, describe the general syntax of a copy constructors ()
25. Inheritance can be extension or contraction. Explain these terms in respect to OOP ()
26. With the aid of an example in each case, explain the following types of polymorphism; (i) Coercion; (ii) Parametric. ()
27. Peter would like to determine the difference between two 1x2 matrixes (A [3,6] and B [2,4] using OOP. Write a C++ that could meet peters objective using objects and an overloaded operator. The program should output the difference (A-B). (8 marks) ()
28. State one advantage and one disadvantage of using inline function in OOP ()
29. Explain each of the following terms as used in C++ programs: I. Access-specifier; II. Pass-by-value. ()
30. Differentiate between virtual functions and pure virtual functions as used in OOP ()
31. Augustine intends to use OOP software for software project. Explain two ways in which she could cope up with new version and packages of the software ()
32. Write a C++ program that will implement the relationship depicted in the figure 2. The program should output the area of each child. ()
33. Distinguish between classes and structs as used in OOP ()
34. Describe two circumstances under which references could be used in OOP ()
35. Files can be accessed using different open modes values. Outline four such open modes used in C++ programs. ()
36. Write a C++ program that would define an abstract base class named bill with data member named units and standingfees, a member function named init( for initializing standingfeee and units) and a polymorphic function for determining the consumption costs. The program should implement the polymorphic function in two derived classes named water and electricity based on the following information: ()
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