Lrap_vdt_boogymen

Exercise: Exercises Write a class named Octagon that extends GeometricObject and implements the Comparable and Cloneable interfaces. Assume all eight sides of the octagon are of equal length. The area can be computed using the following formula: The Octagon class has a private double data field named side with its getter and setter methods. The class has a no-arg constructor that creates an Octagon with side 0, and a constructor to create an Octagon with a specified side. Write a test program that creates an Octagon object with side value 5 and displays its area and perimeter. Create a new object using the clone method, and compare the two objects using the compareTo method.     As far as classes go, the abstract GeometricObject class contains the abstract doubles getArea() and getPerimeter(). The programming language used in this exercise is Java, and it covers the Interfaces topic. I did get how most of the program should look like, but I'm facing trouble understanding a few…

Challenge exercise The following object creation will result in the constructor of the Date class being called. Can you write the constructor’s header? new Date("March", 23, 1861) Try to give meaningful names to the parameters

Refer to the following interface:     Provide two examples (screenshots) that in many ways could improve the above or similar interface using the principles of direct manipulation. Explain the relevant improvements as well. (Examples might have different object, labels and organization)

In Python, #Create a basket class, which has a class/static attribute pricelist (string/float dictionary - you can hardcode this) #The constructor should set the name to the name passed as a parameter and initialise the contents (empty) #You should provide an addItem method taking product,quantity which adds this to the contents #and a getQuantity method taking a product, which returns the relevant quantity

A group or collection of objects with common properties is called:            a.   Class b.   Interface c.   Method d.   Attributes

Dynamic Apex: Write test class for this apex code(Not required the output) You are working on the project in which you have to create the apex code in which your task is to define the objects dynamically by using the method argument which is api name in string and a map of string, string as a key value pair. Class Code: public static void modifySobjectData(String str , Map mapofString) { //Retrive the type of Sobject by using the getGlobalDescribe Schema.SobjectType targetType = Schema.getGlobalDescribe().get(str); //Initalize the Object Sobject newobject = targetType.newSobject(); for (String s :mapofString.keySet() { newobject.put(s, mapofString.get(s)); } System.debug('newObject' + newobject); //Perform the DML if(targetType != null) insert newobject; } }

6. Suppose MyBaseType is an interface. Then MyBaseType* x; is a valid declaration. A. True B. False

What is the purpose of a constructor?     It creates an array of data values associated with an object.     It prints all of the information about our object.     It returns all data members from an object back to the main method.     It allows us to set our own default values when we create an object. in java

An enumeration can contain public constant variables O True O False An interface can extend as many interfaces as the programmer wants O True O False An abstract class must contain at least 1 abstract method O True False

Suppose MyBaseType is an interface. Then MyBaseType* x; is a valid declaration.A. True B. False

Write a statement to create an array, named productList, in a supportive class, with a size of TEN and a data type of String: Question 7 (Mandatory) Write an invoke statement for the currentCircle object from the Circle class, to the behavior setCircleRadius, that invokes validateRadius in the parameters, which passes input in the parameters: ); Question 8 (Mandatory) Write a test condition for a selection structure that tests the values of the Strings named, userName and borrowedUserName, where case matters and the results will be -1, 0 or 1: Question 9 (Mandatory). Write a test condition for a selection structure that tests the values of the Strings named, userName and borrowedUserName, where case does not matter and the results will be true or false:

In Java, declaring a class abstract is useful ... When it doesn't make sense to have objects of that class. To prevent developers from further extending the class. When default implementations of some methods are not desirable. When it makes sense to have objects of that class.

T/F1. Interface classes cannot be extended but classes that implement interfaces can be extended.

10. Please do in java code DJ classDesign, implement and test a DJ class. A DJ object has a name - djName and an isHired attribute (boolean). Also, a DJ object has 3 musicTypes. These are references to the Music class, where the musicType is declared. In Stage 2 you will be required to declare these 3 instance variables as 1 array.A DJ object can return the value of each of its attributes, and change the value of each of its attributes. It can also display itself in the form:Kongapa, Play List: Disco, Rap, Heavy Metal is hiredImpressions, Play List: House, Hip Hop, Jazz is available

Complete the code.

T/F1. Interface classes cannot be expanded, but implementation classes may.

is a construct that defines objects of the same type. A class An object A method A data field

1. Create a Student class that implements the Person interface. As well as storing the students name and email, also store their course grade (e.g A, B, C) in a member variable. The grade should be accessible via a getGrade method. For the implementation of getDescription return a message along the lines of “A C grade student”, substituting the students actual grade.2. Create a Lecturer class that implements the Person interface. This class should also store the subject that the lecturer teaches. Add a getSubject method, and implement getDescription so that it returns a suitable message, e.g. “Teaches Biology”.3. Create a third class, Employee that implements the interface. This should also store the name of the department the Employee works in (available via getDepartment). Again, getDescription should return a suitable message.

Your task is to create a class name polygon that contains 2 data members i.e. length of type float and width (a pointer of type float). Create a single object named “one” in the main and assign values to the data member of the polygon object. Then create another object named “two” that is a copy of the “one”. Create a shallow copy constructor that copies only the pointer data member of the class polygon and then demonstrate that both objects share a common memory i.e. modifying one object in fact modifies the other.Create a display function that will show the values of the polygon object.

3. The interface Range is defined below:public interface Range{ void setLimits(int x, int y); int getNumber();} Implementations of Range should exhibit the following behaviour:• The setLimits method should store its parameter values somewhere to serve as the lower and upper limits of the range appropriately.• A call to getValue should return an integer that is always greater than or equal to the lower limit and less than or equal to the upper limit.The class RandomInteger is an implementation of the interface Range. It also has the following features:• It has two fields of int type, low and high, to record the lower and upper limits of the range, respectively.• It has single constructor method that takes two integers and stores them in the appropriate fields. Note: You should make use of the setLimits method.• A call to the method getNumber should return a random number that is always within the range, i.e. greater than or equal to the lower limit and less than or equal to the upper…

Interface : - Question : Make the AECar class implement the Comparable Java interface. Write a driver program that sorts a list of 4 AECars according to price.