Explain how to use a Scanner object to read information from a page on the internet. Give an example.

Explain what a wrapper classes are and how they are used in Java. Give an example.

What is an ArrayList object? How does is it similar to and how does it differ from a traditional array.

What is inheritance? How is it useful in software projects. How is the is-a test related to inheritance?

What is an exception? Explain how to use try/catch blocks to prevent a program from crashing.

What is refactoring? What are some of the ways that Eclipse can help you with refactoring?

What is the output? Explain how you obtain this answer by hand, not using a computer.

String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for(int i = 1; i <= 26; i *= 2) {
   System.out.print(alphabet.charAt(i - 1));
}

What is the output? Explain how you obtain this answer by hand, not using a computer.

int n = 500;
int count = 0;
while (n > 1) {
    if (n % 2 == 0) {
        n /= 3;
    }
    else {
        n /= 2;
    }
    count++;
}
System.out.println(count);

A Java Swing application contains this paintComponent method for a panel. Sketch what is drawn by this method.

public void paintComponent(Graphics g) {
    super.paintComponent(g);    
    g.setColor(Color.black);
    g.fillRect(100, 100, 200, 100);
    g.fillRect(300, 200, 200, 100);
    g.fillRect(500, 100, 200, 100);
}

An aqueous solution of magnesium oxalate is prepared by dissolving 4.46 g of magnesium oxalate in 1.51×10² g of water. The density of the solution is 1.01 g mL^-1.

a) Determine the mass percent of magnesium oxalate in the solution.

b) Determine the mole fraction of magnesium oxalate in the solution.

An aqueous solution of nickel(II) chloride is prepared by dissolving 5.61 g of nickel(II) chloride in 4.53×10² g of water. The density of the solution is 1.34 g mL^-1.


Determine the molarity (in mol/L) of nickel(II) chloride in the solution.

Freight Terms

Determine the amount to be paid in full settlement of each of two invoices, (a) and (b), assuming that credit for returns and allowances was received prior to payment and that all invoices were paid within the discount period. If required, round the answers to the nearest dollar.

a)At a distance of 0.216cm from the center of a charged conducting sphere with radius 0.100cm, the electric field is 440N/C . What is the electric field 0.604cm from the center of the sphere?

b)At a distance of 0.216cm from the axis of a very long charged conducting cylinder with radius 0.100cm, the electric field is 440N/C . What is the electric field 0.608cm from the axis of the cylinder?

c)At a distance of 0.180cm from a large uniform sheet of charge, the electric field is 440N/C . What is the electric field 1.23cm from the sheet?

With reference to Sweezy’s model of the kinked demand curve, explain the reasons why we might expect price to be unresponsive to small variations in cost in the case of oligopoly. What are the main limitations of the kinked demand curve model?  

b. Quote real world examples of oligopolistic firms that have benefited from a first-mover advantage.

Companies are expected to act ethically and ensure their employees are also acting ethically. However, as we know the level of ethics expected and those practiced are not always the same. Take a moment to share your thoughts on the following questions about ethics.

• Do you believe that ethics can be taught? Why or why not?
• If you were the CEO of a company how would you ensure employees operated at a high ethical standard?

A convergent-divergent nozzle operates under out-of-design conditions, resulting in
formation of a normal shock wave in the diverging section. A large reservoir
supplies air to the nozzle at 400 kPa and 800 K. The throat of the nozzle is 0.2 m2. The number
Mach upstream of the shock wave is M1 = 2.44. The nozzle area at the exit is
0.7 m2. Calculate the area of ​​the nozzle at the location of the shock wave and the temperature of the
air when leaving the nozzle

JAVA

Personal Information Class

Design a class that hold the personal data: name, address, age and phone number. Write appropriate methods (constructor, getters ad setters. Demonstrate the class by writing a program that creates three instances of the class. You can populate information in each object using Scanner class.

Sauer Food Company has decided to buy a new computer system with an expected life of three years. The cost is $430,000. The company can borrow $430,000 for three years at 13 percent annual interest or for one year at 11 percent annual interest. Assume interest is paid in full at the end of each year.  

a. How much would Sauer Food Company save in interest over the three-year life of the computer system if the one-year loan is utilized and the loan is rolled over (reborrowed) each year at the same 11 percent rate? Compare this to the 13 percent three-year loan.
  

b. What if interest rates on the 11 percent loan go up to 16 percent in year 2 and 19 percent in year 3? What would be the total interest cost compared to the 13 percent, three-year loan?
  

I am a physics undergrad and thinking of exploring quantum information theory. I had a look at some books in my college library. What area in QIT, is the most mathematically challenging and rigorous? From what I saw in the books, most topics was just simple linear algebra. I am looking for an area which is mathematically more rich, and uses maybe more concepts from theoretical computer science, number theory, discrete maths, algebra etc. Classical cryptography is an area on the interface of maths and TCS which uses many areas of maths such as number theory, algebra, ellptical curves. Is the quantum cryptography also rich in mathematics? What are the prerequisites? If not, please could you suggest some areas that I are mathematically rich in QIT?

java - Write a method that sums all the numbers in the major diagonal in an n x n matrix of double  values using the following header:

public static  double sumMajorDiagonal(double [][] m)

Write a test program that first prompts the user to enter the dimension n of an n x n matrix, then asks them to enter the matrix row by row (with the elements separated by spaces). The program should then print out the sum of the major diagonal of the matrix.

SAMPLE RUN:

Enter dimension n of nxn matrix:Enter row·0:Enter row 1:Enter·row 2:Enter row 3:17.1

(can have 3 or 4 rows)

What is the working-set modeling?

Present Values

Use Present Value Tables or your calculator to complete the requirements below.

You have an opportunity to purchase a government security that will pay $217,000 in 5 years.

Required:

Round your answers to the nearest cent, if rounding is required.

1. Calculate what you would pay for the security if the appropriate interest (discount) rate is 6% compounded annually.
$

2. Calculate what you would pay for the security if the appropriate interest (discount) rate is 10% compounded annually.
$

3. Calculate what you would pay for the security if the appropriate interest (discount) rate is 6% compounded semiannually.
$

Tasman Products, Ltd., of Australia has a Maintenance Department that services the equipment in the company’s Forming Department and Assembly Department. The cost of this servicing is charged to the operating departments on the basis of machine-hours. Cost and other data relating to the Maintenance Department and to the other two departments for the most recent year are presented below. Data for the Maintenance Department follow: Budget Actual Variable costs for lubricants $ 331,800 * $ 425,340 Fixed costs for salaries and other $ 204,000 $ 219,400 *Budgeted at $21 per machine-hour. Data for the Forming and Assembly Departments follow: Percentage of Peak-Period Capacity Required Machine-Hours Budget Actual Forming Department 75% 10,500 12,500 Assembly Department 25% 5,300 4,300 Total 100% 15,800 16,800 The level of fixed costs in the Maintenance Department is determined by peak-period requirements. Required: Management would like data to assist in comparing actual performance to planned performance in the Maintenance Department and in the other departments. 1. How much Maintenance Department cost should be charged to the Forming Department and to the Assembly Department? 2. How much, if any, of the actual Maintenance Department costs for the year should be treated as a spending variance and not charged to the Forming and Assembly departments?

A stone is catapulted at time t = 0, with an initial velocity of magnitude 24.0 m/s and at an angle of 46.0° above the horizontal. (Neglect air resistance.) Find its horizontal and vertical displacements from the catapult site at the following times after launch.

(a) 0.80 s
m (horizontal)
m (vertical)
(b) 1.80 s
m (horizontal)
m (vertical)
(c) 3.53 s
m (horizontal)
m (vertical)