When you invoke a method on an object instance, the version of the method that will be executed will be detetmined at run-time by the declared class of the object instance. Select one O True O False
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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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- Please answer these multiple choice questions 1) The new operator: allocates memory is used to create an object of a class associates an object with a variable that names it. All of the above. Answer: 2) A method that performs some action other than returning a value is called a __________ method. null void public private Answer: 3) The body of a method that returns a value must contain at least one _________ statement. void invocation thows return Answer: 4) A variable whose meaning is confined to an object of a class is called: instance variable local variable global variable none of the above Answer: 5) A variable whose meaning is confined to a method definition is called an/a instance variable local variable global variable none of the above Answer: 6) In Java, a block is delimited by: ( ) /* */ “ “ { } Answer: 7) In Java, call-by-value is only used with: objects primitive types this all of the above Answer: 8) The parameter this refers to instance variables local…If a class has this method, it is called automatically just before an instance of the class is destroyed by the Java Virtual Machine.a. finalizeb. destroyc. removed. housekeeperA. You can invoke an instance method or reference an instance variable from a static method. B. You can invoke a static method or reference a static variable from an instance method. * Options: Only A is true Both A and B are true Both A and B are false Only B is true Note: Answer the correct option
- True or False ___(37) If class B is a child class of class A, when you create an object from class B, both the constructor of class B and the constructor from the class A are used to create the object. ___(38) An Interface can have a method that contains an empty method body. ___(39) An object can have another object as its private variable.Which of the following statements is false? a. A class can contain only one constructor. b. An example of a behavior is the SetTime method in a Time class. c. An object created from a class is referred to as an instance of the class. d. An instance of a class is considered an object.Modify the student class presented in this chapter as follows. Each student object should also contain the scores for three tests. Provide a constructor that sets all instance values based on parameter values. Overload the constructor such that each test score is assumed to be initially zero. Provide a method called setTestScore that accepts two parameters: the test number (1 through 3) and the score. Also provide a method called getTestScore that accepts the test number and returns the appropriate score Provide a method called average that computes and returns the average test score for this student. Modify the toString method such that the test scores and average are included in the description of the student. Modify the driver class main method to exercise the new Student methods. (c++ language)
- Modify the student class presented in this chapter as follows. Each student object should also contain the scores for three tests. Provide a constructor that sets all instance values based on parameter values. Overload the constructor such that each test score is assumed to be initially zero. Provide a method called setTestScore that accepts two parameters: the test number (1 through 3) and the score. Also provide a method called getTestScore that accepts the test number and returns the appropriate score Provide a method called average that computes and returns the average test score for this student. Modify the toString method such that the test scores and average are included in the description of the student. Modify the driver class main method to exercise the new Student methods. (Java)Create a class called Date that includes three instance variables-a month (type int), a day (type int) and a year (type int). Provide a constructor that initializes the three instance variables and assumes that the values provided are correct. Provide a set and a get method for each instance variable. Provide a method displayDate that displays the month, day and year separated by forward slashes (/). Add a main method to the class that demonstrates class Date's capabilities.Which of the following statements is false? a. A class can contain only one constructor. b. An example of a behavior is the SetTime method in a Time class. c. An object created from a class is referred to as an instance of the class. d. An instance of a class is considered an object.
- Which Option is false about final classes Select one: A final class cannot be extended A final class cannot extend other classes A final method can be inherited A final method cannot be overridden in its subclassesCreates a class Student with 3 attributes: name, id and level. a. Add a constructor able to create a Student; b. Add the methods getId and getName; c. Add the method display able to display the attributes,Write a class named Student. The class contains:■ Private String data field “name” that refers to the name of the student.■ Private integer data field “id” that refers to the student id.■ Private Date data field “dateCreated” that refers to the current date when anew object Student is created.■ A constructor that creates a new instance of the class student with the specifiedname and id.■ Three methods named getName(), getID() and getDateCreated() that returnrespectively the name, the id and the date when the student object was created.■ A toString() method that return a String representation of the student.2. Write a class named Course. The class contains:■ Private String data field “courseName” that refers to the name of the course.■ Private integer data field “capacity” that refers to the capacity of the course(default value 10).■ Private ArrayList of students that contains the students registered in thecourse.■ A constructor that creates a new course with the specified name.■ A…