ANSWER:-
option (a)
if a subclass constructor makes a super() call with a non-empty list of parameters, then the parameter types must be well defined in the superclass
Which one of the following statements is true? If a subclass constructor makes a super) call...
java Which of the following is an incorrect statement about subclass constructors? A superclass constructor is invoked from a subclass constructor by using the keyword "super" and passing any necessary arguments. Every subclass constructor must be an explicit constructor. Every subclass constructor must call a superclass constructor. The superclass constructor call must be the first action performed by a subclass constructor.
In Java Which of the following statements declares Salaried as a subclass of payType? Public class Salaried implements PayType Public class Salaried derivedFrom(payType) Public class PayType derives Salaried Public class Salaried extends PayType If a method in a subclass has the same signature as a method in the superclass, the subclass method overrides the superclass method. False True When a subclass overloads a superclass method………. Only the subclass method may be called with a subclass object Only the superclass method...
44 A method signature defines which of the following? (choose all that apply) return type name call parameters body 45 An abstract class can be implemented using the implements keyword. True False 46 An abstract class can be extended using the extends keyword. True False 47 Abstract classes are represented in UML by: italics underline plus/minus bold 48 An abstract class is a superclass for a subclass. True False 49 These symbols are used to denote an interface in a...
1. When a sub class object is created, when is the call to the super class constructor made? How does a programmer call the super class constructor from the sub class? What do all classes indirectly extend? What methods does every class inherit from the Object class? 2. When writing methods in a sub class, how can those methods call the methods from the parent class? 3. Which class is more specific, a super class or a sub class? 4. ...
1. (TCO 7) Which of the following statements are true? (Points : 5) Interfaces contain one and only one implemented method, a constructor. Interfaces are defined inside an abstract class. All methods defined in an interface must be implemented when used by another class. A true object-oriented design must contain as least one interface. Question 2. 2. (TCO 7) In an object-oriented program, methods with no implementation might be found in an _____ and/or a(n) ______....
PRG/421 Week One Analyze Assignment – Analyzing a Java™Program Containing Abstract and Derived Classes 1. What is the output of the program as it is written? (Program begins on p. 2) 2. Why would a programmer choose to define a method in an abstract class (such as the Animal constructor method or the getName()method in the code example) vs. defining a method as abstract (such as the makeSound()method in the example)? /********************************************************************** * Program: PRG/421 Week 1 Analyze Assignment * Purpose: Analyze the coding for...
Part 1: Use principles of inheritance to write code calculating the area, surface area, and volume of rectangular objects. First, write an abstract super class RectangularShape, then write a subclass Rectangle that inherits from the super class to compute areas of rectangles, including squares if there is only one data. Finally, write another subclass Cuboid that inherits from its super class Rectangle above to compute surface areas and volumes of cuboids, including 3 equal sided cube. Must apply code-reusability in...
Question 14 Consider a singly linked list. What is true about the last node in the data structure? The node cannot store data values. The node points to the head node. The node points to null. The node points to head. Question 15 When defining an interface, you cannot implement another interface. you may not include more than one method signature. you must provide the body of at least one method. you must provide signatures for each method Question 16 Generics are allowed in the class definition header but not in a method definition...
Start a new project in NetBeans that defines a class Person with the following: Instance variables firstName (type String), middleInitial (type char) and lastName (type String) (1) A no-parameter constructor with a call to the this constructor; and (2) a constructor with String, char, String parameters (assign the parameters directly to the instance variables in this constructor--see info regarding the elimination of set methods below) Accessor (get) methods for all three instance variables (no set methods are required which makes...
Java I need help Q1: Suppose this is a legal assignment statement: Student obj1 = new Book(); what is the relationship between Student and Book? 1 - Student has Book as a field 2 - Student is a subtype of Book 3 - No Relationship 4 - Book is a subtype of Student. Question2: Q2: What are the types involved in this statement: Vehicle v1 = new Car(); 1- Car 2- new 3-...