- Which of the followings are true for interfaces. I) An interface can contain public static final data fields II) Interfaces are implemented by classes using the "extends" keyword. II) A class can implement multiple interfaces. IV) Many classes can implement the same interface. V) Methods defined in an interface can contain implementations.

Q: State true or false to implement an interface, a concrete class must implement at least one method…

A: check further steps for the answers :

Q: State true or false to implement an interface, a concrete class must implement at least one method…

A: To be determined: State whether the statement is true or not - to implement an interface , a…

Q: State true or false to implement an interface, a concrete class must implement at least one method…

A: An interface is a mechanism or a tool that allows two unconnected things to communicate with one…

Q: State true or false to implement an interface, a concrete class must implement at least one method…

A: 1) An interface is much like a class, except that interface can only contain method signatures and…

Q: i. When inheriting an Interface from an Interface, the newly created Interface should include all…

A: ANSWER : Option a is correct answer. Classes cannot inherit from an interface, since an interface is…

Q: State a circumstance in which you would prefer an interface over an abstract class. Also, State a…

A: Since Interfaces doesn't exist in C++ but in Java, they do. in Java, I would use an interface when…

Q: Pick the incorrect statement: O A class can implement more than one interface O A class can extend…

A: Extends keyword to include a class (indicates that a class is inherited from another class). In…

Q: Has one abstract and two regular classes  - Has two interfaces (the two regular classes have to…

A: //interface with no methodspublic interface Interface1 { }

Q: UESTION 16 What must be true of a class with one abstract method? O The class must also implement…

A: 16) The abstract method must have the static modifier 17)   Because we're using an array, all pets…

Q: 17. In an interface. can have concrete as well as abstract method all methods need to be concrete…

A: Given:

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

A: Given that, Interface classes cannot be extended but classes that implement interfaces can be…

Q: Give me a code example where you can decouple the classes with the help of Interface? II. Give a…

A: Give me a code example where you can decouple the classes with the help of Interface? interface…

Q: An interface must meet which of these restrictions? I. It must not have any fields. II. Methods…

A: NOTE Below is the answer for the given question.  Hope you understand it well. If you have any…

Q: What is the difference between an interface, class and an instance of the class? b) Is it a good…

A: ONLY FIRST THREE PARTS ARE SOLVED. KINDLY SEND THE REMAINING QUESTIONS ON THE PORTAL AGAIN TO GET…

Q: A class may simultaneously "implement" a class and "extend" an interface. O True O False

A: We can implement a class while extending the interface, java can handle this simultaneously.

Q: The interface Speaker is describe below. public interface Speaker{ public void speak(); public void…

A: // Speaker.java // Speaker Interface public interface Speaker { public void speak(); public…

Q: Declare an interface IA with two method Me() and You(). Define two classes CA and CB which implement…

A: Here, we create four java classes. IA.java that contains an interface CA.java to create class CA…

Q: Declare an interface IA with two method Me() and You (). Define two classes CA and CB which…

A: Program Approach: Define the interface named IA with two abstract methods Me() and You(). Define…

Q: Create an interface that shall have 2 methods and one string type attribute, also create an…

A: Here I have first of all created an interface and in this interface, I have declared 2 methods and…

Q: Given the following code, which statement is correct? class Coffee ( } class Sugar { } class Cup {…

A: Composition class: As inheritance composition class is used for reusing the code. The composition…

Q: Dilowing code shippet oI Object public interface Measurer { double measure (_?. anobject); Complete…

A: 11. Consider the following code snopet of a function object public interface Measurer{        double…

Q: 1. A Java interface can contain only constants and abstract methods. 2. A class that implements an…

A: Java is a programming language. It contains extensive libraries (package). It can be used to create…

Q: 2. What is the output of the following code? Can the class implement multiple interfaces?

A: A class can implement any number of interfaces and we have to implement all the abstract methods in…

Q: Question 4: You have an interface ICar, with a method drive(); a. You have classes BMW, and Mercedes…

A: I give the code in java as per your requirement along with code screenshot and output screenshot

Q: Question 4: You have an interface ICar, with a method drive(); a. You have classes BMW, and Mercedes…

A: An interface in the Java programming language is an abstract type that is used to specify a behavior…

Q: What is the output of the following code? Convert the abstract class into an interface and modify…

A: To do: Output of the given code

Q: 1(c). what is the problem with the code below? Write two different ways to fix the problem.…

A: To Do: To tell the ways to fix the given codes.

Q: Given: interface B B){} {} void methodA(); cannot have a constructor cannot have an instance…

A: Disclaimer : Answering only for the first one : We cannot have a constructor within an interface in…

Q: Abstraction is the basis for good Object-Oriented design that is modular, reusable, and…

A: ANS: - Interface: - An interface is a contract, which simply states the behavior of some component.…

Q: Abstraction is the basis for good Object-Oriented design that is modular, reusable, and…

A: Interface: Interfaces may look like incomplete versions of abstract classes but they provide a…

Q: Which of the given modifiers is used when an abstract method is implemented by a derived class? a.…

A: Answer to the above question is in step2.

Q: Q2 Interfaces For each of the following, tell if the code will compile. If so, no explanation is…

A: When a class implements an interface, then the class has to implement all the methods declared in…

Q: QUESTION 2 A protected member of a class may be directly accessed by O methods of the same class…

A: Given:

Q: To implement an interface, a concrete class must implement AT LEAST ONE method headings listed in…

A: In general, an interface is a tool or a device that unrelated entities use to interact.

Q: Which of the following are incorrect? (Choose all that apply A. You may declare a final abstract…

A: We cannot make an abstract class as final because as we know a final class cannot be subclassed and…

Q: Write the difference between interface and abstract class.

A: The difference between interface and abstract class

Q: Write the difference between interface and abstract class.

A: Basic  Interface Class Abstract Class  implementations  Method interface can't have implementation…

Q: Write the difference between interface and abstract class

A: Interfaces and abstract classes are features of object-oriented programming languages (Java, C#) The…

Q: To implement an interface, a concrete class must implement AT LEAST ONE method headings listed in…

A: Required: To implement an interface, a concrete class must implement AT LEAST ONE method headings…

Q: Abstraction is the basis for good Object-Oriented design that is modular, reusable, and…

A: Interfaces may look like incomplete versions of abstract classes but they provide a flexible way of…

Q: 1. Can you declare a class that contains abstract methods a non-abstract class? 2. Can you declare…

A: 1. No, the abstract methods can't be declared in non abstract class, it is the same reason you can't…

Q: When should you use an abstract class, when an interface, and when both?

A: According to the provided information: We need to define the use of an abstract class, interface…

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

A: Introduction: Classes that implement interfaces cannot be expanded, whereas classes that implement…

Q: Design a generic class to hold the following information about a bank account. - Balance, number of…

A: BankAccount.h: #ifndef BANKACCOUNT_H #define BANKACCOUNT_H class BankAccount {        protected:…

Q: According to the given code, explain the relationships among ClassA, ClassB, ClassC, ClassD, and…

A: The Answer is in step2

Q: QUESTION 2 What is the scope of a private instance variable? O Only the method in which the variable…

A: Given questions are the related to the Java and those are the multiple choice questions.

Q: Describe the difference between making a class a member of another class (object aggregation), and…

A: In object composition, one object is nested inside an object,creating a has-a relationship. When a…

Q: 1. Create an abstract class that stores data about the shapes e.g. Number of Lines in a Shape, Pen…

A: the code is given below :

Q: Match the following: Public A. constructor methods В. A class that contains no methods (other than…

A: Lets see the solution.

Q: Can a class be a super class and a sub-class at the same time? Give example.

A: Yes, Lets Take an Example: