Stale data:

• When the value of a field is completely dependent on other data, then a small change in the other data must be reflected in the field value.

• If that change is not updated in the field value, then it is said the field has become stale.

• In other words, if the change is not updated in the field value, then that data is known as stale data...

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Chapter 9, Problem 9SA

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Chapter 9 Solutions

Starting out with Visual C# (4th Edition)

Ch. 9.1 - How is a class like a blueprint?Ch. 9.1 - Briefly describe the process of writing a class...Ch. 9.1 - What is a constructor?Ch. 9.1 - Prob. 9.4CP Ch. 9.1 - When you pass an object that is an instance of a...Ch. 9.2 - What is a property?Ch. 9.2 - Prob. 9.7CP Ch. 9.2 - Prob. 9.8CP Ch. 9.2 - Prob. 9.9CP Ch. 9.2 - Prob. 9.10CP

Ch. 9.3 - What is a parameterized constructor?Ch. 9.3 - Prob. 9.12CP Ch. 9.3 - Prob. 9.13CP Ch. 9.3 - What happens if you write a class with no...Ch. 9.3 - Describe the purpose of the default constructor.Ch. 9.4 - Prob. 9.16CP Ch. 9.4 - How can you initialize an array of a class type...Ch. 9.4 - Prob. 9.18CP Ch. 9.5 - Prob. 9.19CP Ch. 9.5 - When designing an object-oriented application, who...Ch. 9.5 - How do you identify the potential classes in a...Ch. 9.5 - What are a classs responsibilities?Ch. 9.5 - What two questions should you ask to determine a...Ch. 9.5 - Will all a class's actions always be directly...Ch. 9.6 - Prob. 9.25CP Ch. 9.6 - Prob. 9.26CP Ch. 9.6 - Prob. 9.27CP Ch. 9.6 - Prob. 9.28CP Ch. 9.6 - Prob. 9.29CP Ch. 9 - Each object that is created from a class is called...Ch. 9 - Prob. 2MC Ch. 9 - The first line of a class declaration is known as...Ch. 9 - The classs________ are the statements that define...Ch. 9 - A(n) _____ is a method that is automatically...Ch. 9 - A(n) is a special type of class member that allows...Ch. 9 - A special set of methods, known as_________, work...Ch. 9 - Prob. 8MC Ch. 9 - The parameter of the set accessor is automatically...Ch. 9 - A can be read, but it cannot be modified. a....Ch. 9 - When the value of an item is dependent on other...Ch. 9 - A constructor that accepts arguments is known as...Ch. 9 - Prob. 13MC Ch. 9 - Prob. 14MC Ch. 9 - A methods ______ consists of the methods name and...Ch. 9 - A is a constructor that accepts no arguments. a....Ch. 9 - If you write a class with no constructor...Ch. 9 - Prob. 18MC Ch. 9 - A classs responsibilities are_______. a. the...Ch. 9 - Prob. 20MC Ch. 9 - Objects that are instances of a class are always...Ch. 9 - Prob. 2TF Ch. 9 - A class is an object.Ch. 9 - It is a common practice to make all a classs...Ch. 9 - The same rules for naming variables apply to...Ch. 9 - If you need to make a property read only, you...Ch. 9 - If you try to pass a property to a ref or an out...Ch. 9 - Class fields are almost always declared public in...Ch. 9 - The get accessor can be thought of as a method...Ch. 9 - Constructors can accept arguments in the same way...Ch. 9 - It is legal to write a class without any...Ch. 9 - Objects that are instances of a class can be...Ch. 9 - Prob. 13TF Ch. 9 - One way to find the classes needed for an...Ch. 9 - Prob. 15TF Ch. 9 - By default, a controls Modifiers property is set...Ch. 9 - Prob. 1SA Ch. 9 - What are the advantages of storing classes in...Ch. 9 - How is a constructor used?Ch. 9 - What is the difference between a class and an...Ch. 9 - What convention do most programmers follow when...Ch. 9 - What is the value parameter? How is it created?Ch. 9 - What is executed any time a class property is...Ch. 9 - What is executed any rime a value is assigned to a...Ch. 9 - How can you protect class fields from accidental...Ch. 9 - Prob. 10SA Ch. 9 - Is it possible to pass initialization values to...Ch. 9 - How does the compiler distinguish a method from...Ch. 9 - What do you call the constructor that is provided...Ch. 9 - Prob. 14SA Ch. 9 - Prob. 15SA Ch. 9 - Prob. 16SA Ch. 9 - Prob. 17SA Ch. 9 - Write a statement that creates an instance of the...Ch. 9 - Write the accessors for a property named...Ch. 9 - Prob. 3AW Ch. 9 - Look at the following description of a problem...Ch. 9 - Pet Class Create a class named Pet (similar to the...Ch. 9 - Car Class Create a class named Car that has the...Ch. 9 - Personal Information Class Create a class that...Ch. 9 - Employee Class Write a class named Employee that...Ch. 9 - RetailItem Class Write a class named RetailItem...Ch. 9 - Dorm and Meal Plan Calculator A university has the...Ch. 9 - E-Mail Address Book Create an application with a...

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Solution Summary: The author explains how to overcome the problem of stale data by not storing the field value which is dependent on the other data.

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Chapter 9 Solutions