9. Which of the following characteristics of an language programming object-oriented restricts behavior so that an object can only perform actions that are defined for its class? a. Dynamic Binding b. Polymorphism c. Inheritance d. Encapsulation
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- What is the design pattern depicted in the diagram below? The intent of this design pattern is to define an interface for creating an object, but let subclasses decide which class to instantiate. It lets a class defer instantiation to subclasses. Client Abstraction normalMethodoe BmakeObjecto Product do some stuff aProduct = makeObjecto: f do some more stuff -aProduct Product ConcreteOne ConcreteTwo makeObjecto : Product ProductOne ProductTwo return new ProductOneo. A. Factory Method Design Pattern B. Singleton Design Pattern C. Proxy Design Pattern D. Adapter Design Patterni. When inheriting an Interface from an Interface, the newly created Interface should include all the methods of super Interface. ii. When inheriting a Class from an Interface, the newly created Class should include all the methods of super Interface. iii. Abstract classes have both abstract and non-abstract methods while Interfaces have only abstract methods. Which sentence or sentences is/are wrong? Lütfen birini seçin: a. Only ii b. All c. Only iii d. i and ii e. Only iThe intent of the factory method pattern is to allow a class to differ .. to subclasses Select one: a. instantiation b. abstraction c. delegation
- combines attributes and methods into one unit and hides its internal structure of objects. Select one: a.Information hiding b.Inheritance c.Polymorphism d.Encapsulation1. Creating overloaded methods with identical sets of parameters and different return types result in compilation errors. Overloaded methods must have different sets of parameters- also known as signatures. Is it True or False? 2. Attempting to modify a final instance variable after it is initialized is a compilation error. Is it True or False? 3. A subclass can effect state changes in superclass private members only through public, protected methods provided in the superclass and inherited into the subclass. Is it True or False?Lab 6 - Preparation Questions ITDR2104 - Programming Lab 6 - Preparation Questions Student ID: Student Name: Group No.: All the questions should be completed before the start of lab-7 session. Write your answers in the space provided. 1. Can you declare a class that contains abstract methods a non-abstract class? 2. Can you declare an abstract class that contains no abstract methods? 3. Can objects be created from abstract class? 4. What is an interface?
- When invoking a constructor from a subclass, its superclass’s no-arg constructor is always invoked. Is this statement true or false? Write your answer and in either case, explain your answer.A reference to a superclass cannot be used to point to an object of a subclass. Is this statementtrue or false? Write your answer and in either case, explain your answer.Java does not support multiple inheritance (extending multiple superclasses into one subclass). Is this statement true or false? Write your answer and in either case, explain your answeri. Interface to Interface inheritance is possible. ii. Interfaces have only abstract methods. iii. Interface to Interface inheritance is not possible. iv. Interfaces can not be used for the purpose of multi inheritance. v. For the purpose of multi inheritance more than one Class can be used. Which of the above information(s) is/are wrong? Lütfen birini seçin: a. i-iv-v b. None c. ii-iv d. All e. i-ii-iiiWhat is polymorphism in Java? It is when a program uses several different types of objects, each with its own variable. It is when a single variable is used with several different types of related objects at different places in a program. It is when a single parent class has many child classes. It is when a class has several methods with the same name but different parameter types.
- In Java a class is allowed to inherit from as many superclasses as needed. True FalseDraw and explain the chart for implementing accessibility control using package in Java. Write program for the following. 1. Create an abstract parent class Parent, with Abstract method show, Abstract method display, Concrete method callme 2. Create two concert sub classes Child1 and Child2 which inherits the Parent class. 3. Declare a reference variable of the parent class and create one object for each child class. 4. Assign the reference of the object of child class to the reference variable of the parent class and implement dynamic method dispatch for all the possible methods in each child class.Which of the following statements is TRUE about abstract classes in Java? A. An abstract class implementing an interface does not have to implement methods of the interface. B. An abstract class extending another abstract class does not have to define methods of the super abstract class. C. The first subclass of an abstract class should define all the abstract methods inherited from all the interfaces and super abstract classes. D. All the above E. None of the above
