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Cork Institute of Technology
Bachelor of Science in Computing in Information Technology
Support (FT & ACCS) - Award
(NFQ Level 7)
Autumn 2006
Software Development
(Time: 3 Hours)
Instructions Answer FOUR questions
Examiners: Mr. G. Mac Sweeney Mr. J. Greenslade Mr. J. Walsh 1.
a) Write the code to define the class Person() which includes code for the following methods:
- Set a name
- Set an age
- Return name
- Return age
Decide what data variables are required, arguments for methods, etc. ( 8 Marks )
b) Write a program to create an array of ten Person() objects and read ten names and ages into the array from the file people.dat.
The first part of the code is as follows:
import java.io.*; public class Test1 { public static void main( String args[] ) throws IOException {
File f = new File("people.dat"); FileInputStream fs = new FileInputStream(f); InputStreamReader isr; BufferedReader fileInput; isr = new InputStreamReader(fs); fileInput = new BufferedReader(isr); ……. ( 8 Marks )
c) Write a piece of code which sorts the items from the array into order the youngest first. ( 9 Marks )
a) Write a program that investigates whether a String is a palindrome i.e. a String that’s spelt the same way in reverse e.g. level, navan, etc. For convenience, you can hard code the String you want to check i.e. String s1 = new String(“navan”). ( 10 marks )
b) Describe some of the advantages of using object oriented programming over other types of programming. ( 3 marks )
c) Suggest any disadvantages for object oriented programming. ( 3 marks )
d) What is UML? ( 2 marks )
e) In the context of UML, what is a case diagram? ( 3 marks )
f) Explain what is meant by polymorphism. How does polymorphism manifests itself in java. ( 4 marks )
Write an applet which prompts a user to enter an hourly rate of pay and number of hours worked. When the button in the applet is pressed the program should calculate the total pay and display it for the user as follows:
( 25 Marks )
a) Write a method for a PrimeNumbers() class which determines if a given positive integer is a prime number. ( 8 Marks )
b) Using this method, write a program that lists all prime numbers within a given range e.g. if the range is between 1 and 12 the output might look something like the following:
1 true 2 true 3 true 4 false 5 true 6 false 7 true 8 false 9 false 10 false 11 true 12 false ( 9 Marks )
c) Write a program that determines whether a Sting is a palindrome i.e. a word or expression that spells the same way backwards as forwards e.g. navan. A sample output might look like this:
navan is a palindrome
cork is not a palindrome ( 8 Marks )
a) In Java, what is meant by association? ( 2 Marks )
b) Write a Job() class with the following attributes, constructor and methods:
attributes: responsibility, payRate, time
constructor: public Job(String responsibility, double payRate, double time)
methods: public double getPayRate() public double getTime() public String getResponsibility() ( 6 Marks )
c) Write an Employee() class with the following attributes, constructor and methods:
attributes: name, newJob
constructor: public Employee(String name, Job newJob)
methods: private String displayName() private double calculatePay() public void displayDetails() ( 6 Marks )
d) Write an example program which incorporates the above classes. ( 6 Marks )
e) In java, what is a Vector()? ( 2 Marks )
f) Suggest an advantage of using Vector() instead of an array? ( 3 Marks )
