java programming principles of software design week 2 quiz answers

week 1:

Question 1

  

This is java programming solving problems with software week 1 quiz answers. you will not need any other answers to solve this java programing questions.

You need to know about this java programming course that make you good in learning how to solve problems with java language.

   1.question 1

What is the perimeter of the shape made from the file datatest4.txt whose contents are shown below (just give to two decimal places)?

-3, 9

-8, 7

-12, 4

-6, -2

-4, -6

2, -8

6, -5

10, -3

8, 5

4, 8 

    the answer is here:

          59.45

  2. question 2

Question 2

2.What is the average length of a side in the shape made from the file datatest4.txt whose contents are shown below (just give to two decimal places)?

-3, 9

-8, 7

-12, 4

-6, -2

-4, -6

2, -8

6, -5

10, -3

8, 5

4, 8

    the answer is here:

            5.94

  3.question 3

Question 3

3.What is the longest side in the shape made from the file datatest1.txt whose contents are shown below (just give to two decimal places)?

-3,3

-4,-3

4,-2

6,5

    the answer is here:

          8.48

  4.question 4

Question 4

4.What is the largest perimeter of a shape made from the shapes in files example1.txt, example2.txt, example3.txt and example4.txt (just give to two decimal places)?

    the answer is here:

          62.65

5.question 5

Question 5

5.What is the name of the file that has the shape with the largest perimeter from the four files example1.txt, example2.txt, example3.txt and example4.txt?

    the answer is here:

example3.txt

6.question 6

Question 6

6.The method getNumPoints returns the number of points in a Shape s.

Which one of the following is NOT a correct implementation of getNumPoints?

    the answer is here:

public int getNumPoints (Shape s) {

  int count = 0;

  for (Point p : s.getPoints()) {

    count = count + count;

  }

  return count;

}

7.question 7

Question 7

7.Consider the following code for the function mysteryShape that has one parameter a Shape s and calls the function getNumPoints from the assignment.

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public double mysteryShape (Shape s) {

  double tmp = 0;

  for (Point p : s.getPoints()) {

    

    if (p.getX() > 0) {

      

      if (p.getY() < 0) {

        tmp = tmp + 1;

      }

    }

  }

  return tmp / getNumPoints(s);    

}

 

 

Which one of the following best describes the purpose of this function?

    the answer is here:

The function computes the percentage of those points from the Shape s that have a positive X and a negative Y.

About this Course

Learn to code in Java and improve your programming and problem-solving skills. You will learn to design algorithms as well as develop and debug programs. Using custom open-source classes, you will write programs that access and transform images, websites, and other types of data. At the end of the course you will build a program that determines the popularity of different baby names in the US over time by analyzing comma separated value (CSV) files.

After completing this course you will be able to: 1. Edit, compile, and run a Java program. 2. Use conditionals and loops in a Java program. 3. Use Java API documentation in writing programs. 4. Debug a Java program using the scientific method. 5. Write a Java method to solve a specific problem. 6. Develop a set of test cases as part of developing a program. 7. Create a class with multiple methods that work together to solve a problem; and 8. Use divide-and-conquer design techniques for a program that uses multiple methods.

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