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OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
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- (a) Which of the following are true about Object-Oriented Programming (00P). Choose ALL that apply. A. 00P allows us to define new classes B. Use of inheritance allows us to reuse code without having to rewrite it C. A parent class can have at most one child class in Python D. ALl methods in the parent class must be overridden by the child classComputer Science Object Oriented Analysis and Design. Look at the problem described below and describe how you would break it into objects, consider ways to use inheritance and composition. Describe for me how those objects make a system of objects that solves the problem. You may use UML or just write out a list of classes describing their properties and interface. You should also include a short description of how those objects work together. A local travel agent has built a business on using their knowledge of Europe to create custom trips for couples around Europe. For each client they create customized itineraries (a planned route or journey) and book all the travel and lodging accommodations for their high-end clients. For example they might build a custom vacation in Scotland where the client flies into St. Andrews and stays at a castle for 1 night then takes a bus to Pitlochry where they stay at a hotel for 3 nights then take a private plane to Braemar where they stay in a…Programme in C++. Create any two classes and conduct inheritance by adding 3 data members to parent class and 2 to child class. (classes should include data members). Parent class requires a parameterized constructor. Parent class constructor requires child class constructor values. Create a child class object and show its data on the console.
- 5. Is it compulsory for a class, which has been declared as abstract, to have at least one abstract method?Laguage: C++ Explain youre answer. True or False? - For class inheritance, field initializer is just an efficient opinion for the constructor of the derived class, but we dont necessarily need it.Declare classes Person and Student where Student is derived from Person class. Person has Name and Student has RollNo as its private member. Create a Student class object and initialize it with the already existing object of Student class. Analyze the behavior of default constructors of Person and Student classes. Note: use OOP Concepts with C++ language Solve as soon as possible
- Activity Inheritance and Polymorphism I. PROBLEM SOLVING Perform what is being asked. Write your code on a clean sheet of paper. 1. Create two (2) classes named User and Administrator. The Administrator class should inherit from the User class and the two (2) classes should be members of the namespace named UserNamespace. Refer to the UML class diagram below for the names of the required instance variables, methods, modifiers, and their types. Use the Equals() method to compare strings. Legend User (+) - public (-) - private (#) user_id: string protected # user_password: string italicized - abstract members + User(string id, string pass) + verifyLogin(string id, string pass): bool + updatePassword(string newPassword): void Administrator admin_name: string + Administrator (string name, string id, string pass) + upatePassword (string newPassword): void + updateAdminName(string name): voidObject Oriented Programming (Java): True or False Statements with one line reasoning: 1. The implementation of inheritance always involves writing a few less lines. 2. The following class declaration is incorrect: public final class Class extends OtherClass {...} 3. Inheritance is only useful if specialization is used. In fact, specializing we inherit in the subclass (or subclasses) members of the superclass that we must not rewrite. Instead with the generalization we create an extra class, and then we write more code. 4. The super keyword allows you to call superclass methods and constructors. The keyword this allows you to call methods and constructors of the same class. 5. Multiple inheritance does not exist in Java because it does not exist in reality.Exercise on class inheritance in C++. General requirements: • All data members must be declared as “private” • No global variable is allowed to be declared and used (constants are ok) • Methods within the class and the requested functions cannot have “cin” or “cout” but it should make use of parameters and return value instead unless it is stated explicitly. • “cin” and “cout” should be used in main() or any testing functions • Please make sure that you clearly show how the C++ class, its methods and all the functions are being called and print out its return value and its results properly Please answer the following questions. 1. Define a class named “BooleanVariable” that manages a variable name (string) and a boolean value (true or false). It should not have default constructor. The class must at least provide the following methods: - toString() method that can return a string in the following format: variable-name(variable-boolean-value) such as isSuccessful(true) -…
- 75. The fact that the same operation may apply to two or more classes is called what? a. Inheritance b. Polymorphism c. Encapsulation d. Multiple classificationAnswer By True or False , JAVA LANGUAGE A Java interface can contain only constants and abstract methods. A class that implements an interface can define only the methods that are included in the interface. A static variable can be referenced only from a static method. Static variables are also called class variables.QUESTION 2 In object oriented programming, inheritance improves code readability and maintenance by allowing new classes to re-use existing classes. Use inheritance to solve the following problem: A: A Car is a Vehicle and has a name, a max_speed value and a number_of_cylinders attribute that specifies the number of cylinders in the car's engine. - Add accessor and mutator methods to get and set the values of the class attributes. - Attributes of the car objects are initialized at the time when the object is created. - When a car object is printed, its name, max_speed and number_of_cylinders are shown. B: An Airplane is also a Vehicle and has a name, a max_speed value and a number_of_engines attribute that specifies the number of jet engines the airplane has. - Add accessor and mutator methods to get and set the values of the class attributes. - Attributes of the airplane objects are initialized at the time when the object is created. - When an airplane object is printed, its name,…