Which of the following statements is correct about class constructors? O You can have two constructors with exactly the same signature. O When creating an object for a class, multiple constructors can be invoked. You can create as many constructors as you want, as long as their signatures (parameter list) are different. O Constructors do not have to be public.

Which of the following statements is correct about class constructors? O You can have two constructors with exactly the same signature. O When creating an object for a class, multiple constructors can be invoked. You can create as many constructors as you want, as long as their signatures (parameter list) are different. O Constructors do not have to be public.

Programming with Microsoft Visual Basic 2017

8th Edition

ISBN:9781337102124

Author:Diane Zak

Publisher:Diane Zak

Chapter10: Classes And Objects

Section: Chapter Questions

Problem 5RQ: Which of the following statements is false? a. A class can contain only one constructor. b. An...

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Which of the following are NOT true for a constructor? Select one: a. It does not return anything b. Every class must include an explicitly written constructor c. Every field in the class is initialized in the constructor. d. It must have the same name as the class
Which of the following statements are correct about the given code snippet? class A: def __init__(self, i = 0): self.i = i class B(A): def __init__(self, j = 0): self.j = j def main(): b = B() print(b.i) print(b.j) Group of answer choices Class B inherits A, but the attribute “i” in A is not inherited. Class B inherits A, thus automatically inherits all attributes in A. When you create an object of B, you have to pass an argument such as B(5). The attribute “j” cannot be accessed by object b. How many except statements can a try-except block have? Group of answer choices zero one more than one more than zero
Which of the statements regarding the super keyword is incorrect? (not correct) You can use super to invoke a super class constructor. You can use super to invoke a super class method. You can use super to access a field in the super class if it is protected. You can use super to access a field in the super class if it is private.
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)
Which of the following statements are correct? (Select all that applies.) Group of answer choices a) Inheritance is the process by which one object can acquire the properties of another object. b) "super" is used to access the method or member variables from the parent class. c) Constructors are used to initialize a newly created object. d) Method overriding occurs when a child class declares a method that has the same type of arguments as a method declared by one of its parent classes. e) An object that has more than one form is referred to polymorphism.
Write a class called Alien. The Alien class must have one field of type String called name, one of type String called planet and one field of type boolean called humanoid. Write one constructor that takes three parameters to initialise all of these fields. The parameters must be passed in the order name, planet and humanoid status. IntelliJ hint (this won't be in the real test): put your cursor after the last field; right-click, choose Generate, choose Constructor, select the fields that are set via parameters and click Ok. Check that the constructor is correct. Write a getter method for each field. IntelliJ hint (this won't be in the real test): put your cursor after the closing curly bracket of the constructor; right click, choose Generate, choose Getter, select all of the fields; click Ok. Check that the you have three getters. Do not write setters methods. Write a method called getDetails that will return the values of the fields in one of the following two formats. For example,…
a. Write a FractionDemo program that instantiates several Fraction objects and demonstrates that their methods work correctly. Create a Fraction class with fields that hold a whole number, a numerator, and a denominator. In addition: Create properties for each field. The set access or for the denominator should not allow a 0 value; the value defaults to 1. Add three constructors. One takes three parameters for a whole number, numerator, and denominator. Another accepts two parameters for the numerator and denominator; when this constructor is used, the whole number value is 0. The last constructor is parameterless; it sets the whole number and numerator to 0 and the denominator to 1. (After construction, Fractions do not have to be reduced to proper form. For example, even though 3/9 could be reduced to 1/3, your constructors do not have to perform this task.) Add a Reduce() method that reduces a Fraction if it is in improper form. For example, 2/4 should be reduced to 1/2. Add an operator+() method that adds two Fractions. To add two fractions, first eliminate any whole number part of the value. For example, 2 1/4 becomes 9/4 and 1 3/5 becomes 8/5. Find a common denominator and convert the fractions to it. For example, when adding 9/4 and 8/5, you can convert them to 45/20 and 32/20. Then you can add the numerators, giving 77/20. Finally, call the Reduce() method to reduce the result, restoring any whole number value so the fractional part of the number is less than 1. For example, 77/20 becomes 3 17/20. Include a function that returns a string that contains a Fraction in the usual display formatâ€”the whole number, a space, the numerator, a slash (D, and a denominator. When the whole number is 0, just the Fraction part of the value should be displayed (for example, 1/2 instead of 0 1/2). If the numerator is 0, just the whole number should be displayed (for example, 2 instead of 2 0/3). b. Add an operator*() method to the Fraction class created in Exercise 11a so that it correctly multiplies two Fractions. The result should be in proper, reduced format. Demonstrate that the method works correctly in a program named FractionDemo2. c. Write a program named FractionDem03 that includes an array of four Fractions. Prompt the user for values for each. Display every possible combination of addition results and every possible combination of multiplication results for each Fraction pair (that is, each type will have 16 results).
Create an application class named LetterDemo that instantiates objects of two classes named Letter and CertifiedLetter and that demonstrates all their methods. The classes are used by a company to keep track of letters they mail to clients. The Letter class includes auto-implemented properties for the name of the recipient and the date mailed. Also, include a ToString() method that overrides the Object classs ToString() method and returns a string that contains the name of the class (using CetType and the Letters data field values. Create a child class named CertifiedLetter that includes an auto-implemented property that holds a tracking number for the letter.