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<=KNEC Diploma in ICT module 2 Object Oriented Programming past paper: July 2019
Write a program in C++ to prompt a user to enter a figure (either a circle or rectangle). The program then computes the area of the figure entered through a function and display the result
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Questions List:
1. Define each of the following terms as applied in object oriented programming. (4 marks) (i)Object (ii)Variable
2. Differentiate between token and identifier as used in programming
3. Determine the output of the following C++ statements: (2 marks) char c =’ A’; short m =26; int n= c+m; cout<
4. with the aid of C++ syntax code explain instance variable
5. Johan designed an object-oriented program, the program failed to compile due to incorrect identifier declaration. Explain three rules he should have followed
6. Identify the type of error that will be generated in each of the following cases: (i)Division by a variable that contain a variable zero; (ii)Multiplication operator used for division (iii)Missing semicolon
7. Explain two types of class access specifiers in C++.
8. Write a C++ expression for the following mathematical equation: #(z=x^3+y^3-(xy)/z)#
9. Distinguish between Boolean and character literal as used in programming
10. Explain three errors handling techniques in C++.
11. Outline two advantages of using functions in object oriented programming
12. State two differences between static and non-static data members
13. The following is a C++ program segment. Use it to answer the questions that follows; String x=’’information’’; String y=’’communication’’; Determine the output generated by each of the following function; (6 marks) (i)Cout<<’’(x+y)’’; (ii)Cout<<’’(x.length())’’; (iii)Cout<<”(x.equals(y))”;
14. Define an impure function
15. With the aid of syntax code explain how the member function can be accessed using pointers.
16. Explain local variable as used in object oriented programming
17. Distinguish between encapsulation and abstraction as used in C++.
18. With the aid of syntax code explain inline function
19. Define the term enumerated data type
20. Write a program in C++ that would initialize the values (20 50 40 10 30) into array. The program then display the sum, maximum, and minimum of the values
21. Outline four characteristics of constructors as used in object oriented programming
22. With the aid of syntax code explain copy constructor
23. A C++ class has the name student with the following attributes: Roll number: 5 Total marks: 430 Age: 16 Write a C++ program to declare the class
24. The following code was written by a student. Use it to answer the questions that follows. If(hours=40) { Cout<<”full time”; } Else if(hours<40) { Cout<< “part time” } Else { Cout<< “overtime due”; } (i)Identify three bugs in the code (ii)Re-write the code correctly
25. Outline three differences between overloading and overriding as used in object oriented programming
26. Explain the term compile time polymorphism
27. Distinguish between ifstream and ofstream in file operation
28. Write a program in C++ to prompt a user to enter a figure (either a circle or rectangle). The program then computes the area of the figure entered through a function and display the result
29. Define each of the following terms as used in object oriented programming: (i)Virtual function; (ii)Abstract class.
30. Explain the term object slicing as applied in inheritance
31. Table 1 shows the criteria used to award bursaries to applicant. Use it to answer the question that follows. Write a program in a C++ that would prompt a user to enter the credit scores of an applicant. The program then output the amount. Use case statement
32. Figure 1 shows type of inheritance in C++. Use it to answer the question that follows. (i)Identify the type of inheritance depicted in the figure. (1 marks) (ii)Describe the problem associated with this type of inheritance. (2 marks)
33. Explain two types of exceptions in object oriented programming
34. Describe namespace as used in C++ programming language
35. With the aid of a syntax code, explain the use of break and continue statements
36. Write a program in C++ to accept a string through the keyboard and store it in a file
1. Define each of the following terms as applied in object oriented programming. (4 marks) (i)Object (ii)Variable
2. Differentiate between token and identifier as used in programming
3. Determine the output of the following C++ statements: (2 marks) char c =’ A’; short m =26; int n= c+m; cout<
4. with the aid of C++ syntax code explain instance variable
5. Johan designed an object-oriented program, the program failed to compile due to incorrect identifier declaration. Explain three rules he should have followed
6. Identify the type of error that will be generated in each of the following cases: (i)Division by a variable that contain a variable zero; (ii)Multiplication operator used for division (iii)Missing semicolon
7. Explain two types of class access specifiers in C++.
8. Write a C++ expression for the following mathematical equation: #(z=x^3+y^3-(xy)/z)#
9. Distinguish between Boolean and character literal as used in programming
10. Explain three errors handling techniques in C++.
11. Outline two advantages of using functions in object oriented programming
12. State two differences between static and non-static data members
13. The following is a C++ program segment. Use it to answer the questions that follows; String x=’’information’’; String y=’’communication’’; Determine the output generated by each of the following function; (6 marks) (i)Cout<<’’(x+y)’’; (ii)Cout<<’’(x.length())’’; (iii)Cout<<”(x.equals(y))”;
14. Define an impure function
15. With the aid of syntax code explain how the member function can be accessed using pointers.
16. Explain local variable as used in object oriented programming
17. Distinguish between encapsulation and abstraction as used in C++.
18. With the aid of syntax code explain inline function
19. Define the term enumerated data type
20. Write a program in C++ that would initialize the values (20 50 40 10 30) into array. The program then display the sum, maximum, and minimum of the values
21. Outline four characteristics of constructors as used in object oriented programming
22. With the aid of syntax code explain copy constructor
23. A C++ class has the name student with the following attributes: Roll number: 5 Total marks: 430 Age: 16 Write a C++ program to declare the class
24. The following code was written by a student. Use it to answer the questions that follows. If(hours=40) { Cout<<”full time”; } Else if(hours<40) { Cout<< “part time” } Else { Cout<< “overtime due”; } (i)Identify three bugs in the code (ii)Re-write the code correctly
25. Outline three differences between overloading and overriding as used in object oriented programming
26. Explain the term compile time polymorphism
27. Distinguish between ifstream and ofstream in file operation
28. Write a program in C++ to prompt a user to enter a figure (either a circle or rectangle). The program then computes the area of the figure entered through a function and display the result
29. Define each of the following terms as used in object oriented programming: (i)Virtual function; (ii)Abstract class.
30. Explain the term object slicing as applied in inheritance
31. Table 1 shows the criteria used to award bursaries to applicant. Use it to answer the question that follows. Write a program in a C++ that would prompt a user to enter the credit scores of an applicant. The program then output the amount. Use case statement
32. Figure 1 shows type of inheritance in C++. Use it to answer the question that follows. (i)Identify the type of inheritance depicted in the figure. (1 marks) (ii)Describe the problem associated with this type of inheritance. (2 marks)
33. Explain two types of exceptions in object oriented programming
34. Describe namespace as used in C++ programming language
35. With the aid of a syntax code, explain the use of break and continue statements
36. Write a program in C++ to accept a string through the keyboard and store it in a file
