1. What are getters and setters? Give an example of each. 2. What is encapsulation? 3. What is a constructor and when is it executed? What does it usually do?
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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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- I have multiple constructors defined in a class. Is it possible to call a constructor from another constructor’s body?What happens if you try to override a non-virtual or final method in a derived class?Create a deck of cards class. Internally, the deck of cards should use another class, a card class. Your requirements are: The Deck class should have a deal method to deal a single card from the deck After a card is dealt, it is removed from the deck. There should be a shuffle method which makes sure the deck of cards has all 52 cards and then rearranges them randomly. The Card class should have a suit (Hearts, Diamonds, Clubs, Spades) and a value (A,2,3,4,5,6,7,8,9,10,J,Q,K)
- Make sure you know the difference between an abstract class and an interface and constructors.Person and Customer Classes Write a class named (Person) with data attributes for a person’s name, address, and telephone number. Provide accessors/getters and mutators/setters for each attribute. Write a displayPerson() to print out the attributes of the Person. Next, write a class named (Customer) that is a subclass of the (Person) class. The (Customer) class should have a data attribute for a customer number, and a Boolean data attribute indicating whether the customer wishes to be on a mailing list. Provide accessors/getters and mutators/setters for each attribute. Write a display customer() to print out the attributes of the Customer. Demonstrate an instance of the (Customer) class in a simple program.Can we declare a class as Abstract without having any abstract method?
- 1. What is the purpose of constructors? 2. Can you freely choose the identifier (i.e., name) of a constructor (like, for example, for methods)? 3. Write a possible constructor declaration for class School. Note that its body may even be emtpy. 4. How many constructors can a class have? 5. Do all classes have at least one constructor?1. Why do you need to implement all the methods of an interface in class which implements an interface?To overload constructors, we write multiple constructor declarations with the same signatures. True False