PRG/420 Version 10 All Weeks DQ’s ( ORIGINAL )
Week 1:
Q1.
Java™ is a portable language, and being an object-oriented programming language, it also encourages component reusability. How does Java™ achieve these two important features? How are these features desirable in modern software engineering?Q2.
You are a bank manager and you are helping a new bank teller understand the kind of accounts the bank offers. If a customer comes in asking to open a new savings account, the teller needs to ask what kind of account—passbook savings or certificate of deposit—the customer would like to open. Remind the customer that all accounts with our bank are insured by the FDIC. You should explain that all accounts earn some interest; a savings account’s interest is compounded monthly. You should assign a unique account number after accepting the customer’s initial deposit. If the customer chooses to receive statements electronically, the system will send an e-mail with a monthly statement; if the customer chooses not to, then a paper statement will be sent by mail quarterly.If savings account is a class, give an example of each of the following as it relates to that savings account. Explain your reasoning behind your example.
Superclass Subclass Attribute Method Instance (object) EncapsulationWeek 2:
Q1.
What are the three types of errors that you can encounter in a Java™ program? Describe them, and explain how you would minimize the errors. What are some examples of errors that you have seen before?Q2.
A class is a blueprint for an object. A class may have a default constructor, a constructor with arguments, accessor methods, mutator methods, public fields, and private fields. Choose a category (such as animal, vehicle, and so on) and describe how you would design a class for it.Week 3:
Q1.
Select and complete one of the following activities:
Convert the following program from forloop to whileloop.
class ArithmeticProgression
{
public static void main (String [] args)
{
int ;
for (int ; i <= 1000; i++)
{
+ i;
System.out.println(Integer.toString(sum));
}
}
}
Compare the efficiency between a forloop and a whileloopin the same program. Your program should be able to tell if a forloop is faster than a while-loop at the end of the program. Include the result of your run with the information on which one isfaster.
Q2.
There are 3 kinds of loops—for loop, while loop, and do while loop. Under which circumstances would each kind of loop be more appropriate? Explain your answers using specific examples.Week 4:
Q1.
What is the difference between arrays and ArrayList? What are the advantages and disadvantages of an ArrayList, and when should you use an ArrayList over a simple array?Q2.
What is the difference between string and StringBuilder? What are the advantages and disadvantages of a StringBuilder, and when should you use a StringBuilder over a simple String?Week 5:
Q1.
In your opinion, what are the three biggest challenges in planning and designing a solution for a programming problem? What can you do to overcome these challenges? How would you apply these techniques to the programs in this class?Q2.
Using an example from your work or daily life, describe an “is-a” relationship. Why is an “is-a” relationship important when designing an inheritance between classes?
PRG/420 Version 10 All Weeks Individual Assignment (Original Work)Week 1:
Create a program in Java™ that displays “Hello world!” Take a screen shot that shows the program’s successful compilation and execution. Then submit your program along with the screen shot.
Week 2:
Write a Java™ application using NetBeans™ Integrated Development Environment (IDE) that calculates the total annual compensation of a salesperson. Consider the following factors:
A salesperson will earn a fixed salary of $50,000 A salesperson will also receive a commission as a sales incentive. Commission is a percentage of the salesperson’s annual sales. The current commission is 5 % of total sales. The total annual compensation is the fixed salary plus the commission earned.The Java™ application should meet these technical requirements:
The application should have at least one class, in addition to the application’s controlling class (a controlling class is where the main function resides). There should be proper documentation in the source code.The application should ask the user to enter annual sales, and it should display the total annual compensation.
Week 3:
Modify the Week Two Java™ application using Java™ NetBeans™ IDE to meet these additional and changed business requirements:
The company has recently changed its total annual compensation policy to improve sales. A salesperson will continue to earn a fixed salary of $50,000. The current sales target for every salesperson is $120,000. The sales incentive will only start when 80% of the sales target is met. The current commission is 5% of total sales. If a salesperson exceeds the sales target, the commission will increase based on an acceleration factor. The acceleration factor is 1.5. The application should ask the user to enter annual sales, and it should display the total annual compensation. The application should also display a table of potential total annual compensation that the salesperson could have earned, in $5000 increments above the salesperson’s annual sales, until it reaches 50% above the salesperson’s annual sales.Sample Table: Assuming a total annual sales of $100,000, the table would look like this:
Total Sales
Total Compensation
100,000
<<Program calculated value>>
105,000
<<Program calculated value>>
110,000
<<Program calculated value>>
115,000
<<Program calculated value>>
120,000
<<Program calculated value>>
125,000
<<Program calculated value>>
130,000
<<Program calculated value>>
135,000
<<Program calculated value>>
140,000
<<Program calculated value>>
145,000
<<Program calculated value>>
150,000
<<Program calculated value>>
The Java™ application should also meet these technical requirements:
The application should have at least one class, in addition to the application’s controlling class. The source code must demonstrate the use of conditional and looping structures.There should be proper documentation in the source code.
Week 4:
Modify the Week Three Java™ application using Java™ NetBeans™ IDE to meet these additional and changed business requirements:
The application will now compare the total annual compensation of at least two salespersons. It will calculate the additional amount of sales that each salesperson must achieve to match or exceed the higher of the two earners. The application should ask for the name of each salesperson being compared.The Java™ application should also meet these technical requirements:
The application should have at least one class, in addition to the application’s controlling class. The source code must demonstrate the use of Array or ArrayList. There should be proper documentation in the source code.
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