Answer the questionsPRG455 TEST 1 Student Name:...

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Answer the questionsPRG455                                            TEST 1 Student Name: _______________________________________          Duration: 60 minutes                    Marks: 20 1. (6.5 marks) Write a complete definition of the C# class Circle which contains the following members: - a private non-static data field to store a circle’s radius  - a constant PI (=3.141592) - a public read/write property that can be used to read/write radius - a public read-only property that is returning circle’s area (Note: PI*radius*radius) - a public constructor with a parameter that is used to initialize radius ANSWER: 2. (4 marks) Design a form’s Load event handler that will use the Circle class created in question 1 to execute the following tasks when the form is loaded:       - Create an object of the Circle class. Note: make up your own initial radius value.       - Use the property created in the Circle class to assign the radius which is entered into the          txtRadius text box by the user. The previously created object should be used.       - Use the message box and the property that returns circle’s area to show the area of the          circle. Write a complete definition of the Form1_Load event handler to meet these requirements. ANSWER: 3. (2.5 marks) If given the following method of the class named MyClass:          public static void Test(params string [ ] array)          {                 //some code that defines this method is placed here          } Write two different examples of this method calls statements, one inside its own class and the other one outside of its class and include all necessary declarations. ANSWER: A) //a method call inside its class B) //a method call outside of its class                    4. (3 marks) Write a code segment to execute the following:      - If given a class named FormTest create an object of this class. Note: the FormTest class        was previously defined.      - Show FormTest as a modal form.      - Close the current form. ANSWER: 5. (4 marks) Given the following jagged array declaration:                      string[][] courses;   Assume that the courses array has been created and initialized, i.e. the array contains the lists of courses taken by a given number of students. Write a code segment that uses a nested foreach loop to display the list of courses for each student individually as shown in the following example:                             Student 1 courses => PRG455,  NET455,  MTH355, GEN455, MCO455                            Student 2 courses => PRG455,                            Student 3 courses => PRG455, NET455, MCO455,                                                            ……………………………… You should use the format of the output shown above and include all necessary declarations. You can use a control of your choice to display the output (e.g. a list box, a multiline text box, etc.). ANSWER:                       2

Aditya · Accepted Answer

PRG455                                            TEST 1
Student Name: _______________________________________          Duration: 60 minutes                   
Marks: 20
1. (6.5 marks) Write a complete definition of the C# class Circle which contains the following members:
- a private non-static data field to store a circle’s radius 
- a constant PI (=3.141592)
- a public read/write property that can be used to read/write radius
- a public read-only property that is returning circle’s area (Note: PI*radius*radius)
- a public constructor with a parameter that is used to initialize radius
ANSWER:
using System;
using System.Collections.Generic;
using System.Text;
 
namespace Test1
{
    class Circle
    {
        private double radius;
        private const double PI = 3.141592;
        public Circle(double radius)
        {
            this.radius = radius;
        }
 
        public double getArea() 
        {
            return PI * radius * radius;
        }
 
        public void setRadius(double radius) 
        {
            this.radius = radius;
        }
 
        public double getRadius() 
        {
            return radius;
        }
    }
}
2. (4 marks) Design a form’s Load event handler that will use the Circle class created in question 1 to execute the following tasks when the form is loaded:
      - Create an object of the Circle class. Note: make up your own initial radius value.
      - Use the property created in the Circle class to assign the radius which is entered into the 
        txtRadius text box by the user. The previously created object should be used.

PRG455 XXXXXXXXXXTEST 1 Student Name: _______________________________________ XXXXXXXXXXDuration: 60 minutes Marks: 20 XXXXXXXXXXmarks) Write a complete definition of the C# class Circle which...

Answer To: PRG455 XXXXXXXXXXTEST 1 Student Name: _______________________________________ XXXXXXXXXXDuration: 60...

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