hich of the following statement is not true? An anonymous inner class is compiled into a class named OuterClassName$InnerClassName.class An anonymous inner class must always extend a superclass or implement an interface, but it cannot have an explicit extends or implements clause. An anonymous inner class always uses the no-arg constructor from its superclass to create an instance. If an anonymous inner class implements an interface, the constructor is Object(). An anonymous inner class must implement all the abstract methods in the superclass or in the interface

hich of the following statement is not true? An anonymous inner class is compiled into a class named OuterClassName$InnerClassName.class An anonymous inner class must always extend a superclass or implement an interface, but it cannot have an explicit extends or implements clause. An anonymous inner class always uses the no-arg constructor from its superclass to create an instance. If an anonymous inner class implements an interface, the constructor is Object(). An anonymous inner class must implement all the abstract methods in the superclass or in the interface

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter11: Advanced Inheritance Concepts

Section: Chapter Questions

Problem 7RQ

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Which of the following statements are true? Group of answer choices 1. A superclass reimplements the functionality of its subclasses. 2. A class that implements an interface reuses the functionality of the interface. 3. A derived class reuses the functionality instead of reimplements it. 4. If a class has no bugs, we can inherit from it without fear of having any bugs in our class.
14. Which statements are true about the following code? (Choose all that apply) 1: interface HasVocalCords {2: public abstract void makeSound();3: }4: public interface CanBark extends HasVocalCords {5: public void bark();6: } A. The CanBark interface doesn’t compile.B. A class that implements HasVocalCords must override the makeSound() method.C. A class that implements CanBark inherits both the makeSound() and bark() methods.D. A class that implements CanBark only inherits the bark() method.E. An interface cannot extend another interface. Can you explain this code as well as the methods such as interface abstract etc. used in it.
14. Which statements are true about the following code? (Choose all that apply) 1: interface HasVocalCords {2: public abstract void makeSound();3: }4: public interface CanBark extends HasVocalCords {5: public void bark();6: } A. The CanBark interface doesn’t compile.B. A class that implements HasVocalCords must override the makeSound() method.C. A class that implements CanBark inherits both the makeSound() and bark() methods.D. A class that implements CanBark only inherits the bark() method.E. An interface cannot extend another interface. Please explain this code abstract, extent and interface methods too in detail.
Which one is true? A) An inner class can be declared public or private subject to the same visibility rules applied to a member of the class. B)An inner class can be declared static. A static inner class can be accessed using the outer class name. A static inner class cannot access non-static members of the outer class. C)An inner class supports the work of its containing outer class and is compiled into a class named OuterClassName$InnerClassName.class. D)Inner classes can make programs simple and concise.
Which of the following is an example of dynamic dispatch? A: Assume you have an interface Car. There are three classes that implement the Car interface: Accord, Civic, Charger. Each of these classes has their own drive() method. There is an object myCar of type Car. When you invoke the drive() method, by calling myCar.drive() the correct implementation of drive() is chosen at runtime based upon the concrete class of myCar. B: Assume you have a variable myVariable. You have a for loop. The first time through the loop you set myVariable to an int, the next time you set it as a double, the next time a String, and finally an int. Each iteration of the loop myVariable has the correct type. C: Assume you have a class call Computation. Your computation class has a static method called add(). This method has three different versions:add(int x, int y)add(float x, float y)add(double x, double y)When you run Computation.add(x,y) the correct version of the method is chosen at compile time based…
What does the super keyword represents and where can it be used? Give an example of a superclass and subclass. Be sure to make all the instances variables of the super class private. Include at least one constructor in each class and ensure that the constructor of the subclass calls the constructor of the superclass. Also include a toString method in both classes that returns the values of the instance variables with appropriate labels. Ensure that the toString method of subclass calls the toString method of the superclass so that the string returned contains the values of all the inherited instance variables.
Create an interface relational interface relational { void greaterThan(); void lessThan(); void greaterThaneq(); void lessThaneq(); } Write an implementing class implRel which implements realational class implRel implements relational { int a, b; implRel(int a,int b) { this.a=a; this.b=b; } - - - } Create a class relationdemo .In main create an object of implRel (implementing class) and invoked me6
Which (if any) of the following conditions are necessary for using polymorphism? Select all correct answers. The classes involved are in the same hierarchy. None of the classes can be abstract. All of the subclasses involved override the same method. The object reference cannot be of an interface type. An object reference of the superclass is used to call any methods. A superclass object is referenced by a subclass reference. Which of the following (if any) are true of abstract methods? Select all correct answers. Abstract methods must have a method body. Abstract methods cannot be declared in a class that isn't abstract itself. Abstract methods cannot be private or static. Abstract methods can only be declared in an interface. Abstract methods cannot be called. Constructor methods can be abstract.
Which (if any) of the following conditions are necessary for using polymorphism? Select all correct answers. The classes involved are in the same hierarchy. None of the classes can be abstract. All of the subclasses involved override the same method. The object reference cannot be of an interface type. An object reference of the superclass is used to call any methods. A superclass object is referenced by a subclass reference. Which of the following (if any) are true of abstract methods? Select all correct answers. Abstract methods must have a method body. Abstract methods cannot be declared in a class that isn't abstract itself. Abstract methods cannot be private or static. Abstract methods can only be declared in an interface. Abstract methods cannot be called.
6.Which among the following is correct for the following code? class A { public : class B { public : B(int i): data(i) { } int data; } }; class C: public A { class D:public A::B{ }; }; i Multi-level inheritance is used, with nested classes ii Multiple inheritance is used, with nested classes iii Single level inheritance is used, with enclosing classes iv Single level inheritance is used, with both enclosing and nested classes
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…
1)In the C++ code segment below, which of the following are valid reasons for making vUnit a member of myClass2? class myClass1 { //other details omitted}; Class myClass2 { myClass1 vUnit; //other details omitted}; A)It allows for polymorphism. It models a has-a relationship in myClass2 to myClass1. B)It uses less memory that inheritance. C)It is a short-hand notation for inheritance. D)It gives myClass2 faster access to myClass1 than could be achieved via inheritance. 2)which of the following represent valid use cases of the ANSI C register storage class specifier? A)A for loop in which the loop index is declared in the initialization. B)A short int inside a block which will be passed by pointer to another function. C)An unsigned short defined inside a function combined with other quantities as a bitmask. D)A parameter list of an external function declared in a header file. E)A char array declare at file…

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		An anonymous inner class is compiled into a class named OuterClassName$InnerClassName.class
		An anonymous inner class must always extend a superclass or implement an interface, but it cannot have an explicit extends or implements clause.
		An anonymous inner class always uses the no-arg constructor from its superclass to create an instance. If an anonymous inner class implements an interface, the constructor is Object().
		An anonymous inner class must implement all the abstract methods in the superclass or in the interface.