Starting with your solution to the previous task, add the following methods to your Circle class to extend its functionality. • A method named get_diameter(self) which returns the diameter of a circle (the diameter of a circle is twice the radius). • A method named get_perimeter(self) which returns the perimeter (or circumference) of a circle (the perimeter of a circle is 2 times pi times the radius). Use math.pi to calculate the perimeter of a circle (you do not need to "import math", this has already been done for you). • A method named get_area(self) which returns the area of a circle (the area of a circle is pi times the radius squared). Submit the entire class definition (including the_init_() and set_radius() methods from the previous exercise). Note - keep a copy of your solution to this task because you will be extending it step by step in subsequent tasks. For example: Test r = Circle() print("diameter is {:.2f}, perimeter is {:.2f} and area is {:.2f} ". format( r.get_diameter(), r.get_peri r = Circle(4) print("diameter is {:.2f}, perimeter is {:.2f} and area is {:.2f} ". format( r.get_diameter(), r.get_peri

Starting with your solution to the previous task, add the following methods to your Circle class to extend its functionality. • A method named get_diameter(self) which returns the diameter of a circle (the diameter of a circle is twice the radius). • A method named get_perimeter(self) which returns the perimeter (or circumference) of a circle (the perimeter of a circle is 2 times pi times the radius). Use math.pi to calculate the perimeter of a circle (you do not need to "import math", this has already been done for you). • A method named get_area(self) which returns the area of a circle (the area of a circle is pi times the radius squared). Submit the entire class definition (including the_init_() and set_radius() methods from the previous exercise). Note - keep a copy of your solution to this task because you will be extending it step by step in subsequent tasks. For example: Test r = Circle() print("diameter is {:.2f}, perimeter is {:.2f} and area is {:.2f} ". format( r.get_diameter(), r.get_peri r = Circle(4) print("diameter is {:.2f}, perimeter is {:.2f} and area is {:.2f} ". format( r.get_diameter(), r.get_peri

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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DirectionsThe total cost of a group of items at a grocery store is based on the sum of the individual product prices and the tax (which is 5.75%). Products that are considered “necessities” are not taxed, whereas products that are considered “luxuries” are. For this practice problem you will need to download Shopping Trip Starting Code.zip The Product class is abstract, and it has a method called getTotalPrice. Your task is to create two subclasses of Product: NecessaryProduct and LuxuryProduct and implement the getTotalPrice method in each of these classes appropriately.Then modify the driver program to instantiate four products (two necessary and two luxury) and store them in the product array, print out each item in the array, and display the total cost of the items. You should not make any change at all to Product.java, and you should only add to ShoppingTripStartingCode.java. Do not change any code that is already present. Make sure that it is for anygiven…
Create a class with a method. The method has to decide whether a given year is a leap year or not. Note- A year is a leap year if: • It has an extra day i.e. 366 instead of 365. It occurs in every 4 year e.g. 2008, 2012 are leap years. For every 100 years a special rule applies-1900 is not a leap year but 2000 is a leap year. In those cases, we need to check whether it is divisible by 400 or not. > > ClassAssignmentEx2 ©LeapYearDecider javaclassnotes.assignments javaclassnotes.assignments ClassAssignmentEx2() LeapYearDecider() main(String):void A isLeapYear(int):boolean
Here is _The output of first method should be that they are not equal. And the output of the second method should be that they are equal. Partial code is given below to help you complete this question. You can ignore this entirely and write your...
You are responsible for adding the appropriate testing code to your main. a. The getValedictorian method returns the valedictorian of the class, that is the student with the highest grade point average. Implement this new method. b. The getHonorsPercent method returns the percentage of students in the class who are in the honors program. Use 3.75 as the cutoff GPA. Implement this method. Also print the list of students, by using the isHonor method, in the Honors program. c. An alternate implementation for the School class is being considered, in which the students are stored in an ArrayList instead of an array. Show how the declaration of the data field students would look in this alternate design. MAIN CLASS: import java.util.ArrayList; public class Main { public static void main(String[] args) { System.out.println("Unit07Project2 by Your Name"); System.out.println(); int size = 10; School onw = new School(size); /* Add the code…
create a method for each of the following results using the array concept and any type of loopi. The total mark of the student in each module. ii. Finding the list of modules that the student has passed or failed in that semester. iii. Finding the highest mark of the student in all assessments. JAVA
Create a class that represents the grade distribution for a given course. In this class you should write methods to perform the following tasks: Read the number of each of the letter grades A, B, C D and F Set the number of letter grades A, B, C, D and F Return the total number of grades Return the percentage of each letter grade as a whole number between 0 and 100 inclusive Draw a bar graph of the grade distributionThe graph should have five bars, one per grade. Each bar can be a horizontal row of asterisks, such that the number of asterisks in a row is proportionate to the percentage of grades in each category. For example, let on asterisk represent 2%, so 50 asterisks correspond to 100%. Mark the horizontal axis at 10% increments from 0 to 100% and label each line with a letter grade.For example, if the grades are entered as 1A, 4B's, 6C's, 2D's and 1 F, then the output would look like: 0 10 20 30 40 50 60 70 80 90 100 IIIIIIIIIII **************************************************…
Exercise: return object as parametersComplete the following program by completing the method named set() that creates a new pointr3. After creation of r3, set the values of length and width of that point r3. After setting thevalues, return the new point r3 to the caller in the main method (the callers are:System.out.println(r1.set().length) and System.out.println(r1.set().width)).
Create a class that represents the grade distribution for a given course. In this class you should write methods to perform the following tasks: Read the number of each of the letter grades A, B, C D and F Set the number of letter grades A, B, C, D and F Return the total number of grades Return the percentage of each letter grade as a whole number between 0 and 100 inclusive Draw a bar graph of the grade distributionThe graph should have five bars, one per grade. Each bar can be a horizontal row of asterisks, such that the number of asterisks in a row is proportionate to the percentage of grades in each category. For example, let on asterisk represent 2%, so 50 asterisks correspond to 100%. Mark the horizontal axis at 10% increments from 0 to 100% and label each line with a letter grade.For example, if the grades are entered as 1A, 4B's, 6C's, 2D's and 1 F, the total number of grades is 14, the percentage of As os 7, the percentage of Bs is 29, the percentage of Cs is 43, the…
Add a method called multiplesOfFive to the Exercise class. The method must have a void return type and take a single int parameter called limit. In the body of the method, write a while loop that prints out all multiples of 5 between 10 and limit (inclusive) on a single line. For instance, if the value of limit were 15 then the method will print: 10 15 You can use the printEvenNumbers method that is already in the Exercise class as an example to help you work out how to complete this method. In the main method of the Main class, add a call on the Exercise object to your multiplesOfFive method that prints the multiples of 5 between 10 and 25. Add a method called sum to the Exercise class. The method must have a void return type and take no parameters. In the body of the method, write a while loop to sum the values 1 to 10 and print the sum once the loop has finished. In the main method of the Main class, add a call on the Exercise object to your sum method. Check that it prints: 55 Add…
Add another public method called add() to TestFraction1 class. This method adds another fraction to the ‘calling object’. Thus, the method will take a Fraction class object as a parameter, add this parameter fraction to the calling object (fraction), and return a Fraction object as a result. HINT: we can use cross multiplication to determine the numerator of the resultant Fraction. The denominator of the resultant Fraction is simply the multiplication of the denominators of the two other Fractions. import java.util.Scanner;//test programpublic class TestFraction1{public static void main(String[] args) {//create a Scanner objectScanner in = new Scanner(System.in);//create new fractionFraction frac = new Fraction();//declare numerator and denominatorint n=1,d;System.out.print("Enter Fraction's Numerator: ");//input numeratorn = in.nextInt();System.out.print("Enter Fraction's Denominator: ");//input denominatord = in.nextInt();//loop execute until the numerator is…
can you please help me with the last part of this code because I don't understand this; part of the code is below and the other part of the code is in the photo. question: In the LightsOutPuzzle class, write a method copy(self) that returns a new LightsOutPuzzle object initialized with a deep copy of the current board. Changes made to the original puzzle should not be reflected in the copy, and vice versa. >>> p = create_puzzle(3, 3)>>> p2 = p.copy()>>> p.get_board() == p2.get_board()True >>> p = create_puzzle(3, 3)>>> p2 = p.copy()>>> p.perform_move(1, 1)>>> p.get_board() == p2.get_board()False In the LightsOutPuzzle class, write a method successors(self) that yields all successors of the puzzle as (move, new-puzzle) tuples, where moves themselves are (row, column) tuples. The second element of each successor should be a new LightsOutPuzzle object whose board is the result of applying the corresponding move to the current…
An element in the array is a peak (max or min) if the elements before and after that element are greater than the element itself (min) or the elements before and after that element are less than the element (max). Write a method in your program called displayPeaks that will take a single-dimensional array as parameter and display all peak elements of that array (line by line) together with their index and whether they are max or min. For example, calling the method displayPeaks from main method will display: 83 at position 0 is a max 48 at position 1 is a min 89 at position 2 is a max 40 at position 4 is a min 94 at position 5 is a max 12 at position 8 is a min 87 at position 11 is a max 10 at position 12 is a min 78 at position 14 is a max 2 at position 15 is a min 52 at position 18 is a max 46 at position 19 is a min