CPP225 Enumerations and Structures Quiz
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Questions and Answers

What is an enumeration in object-oriented programming?

  • A class that contains only static methods
  • A predefined data type with a set of name-value pairs (correct)
  • A data type used to store a single value
  • An array with named elements

    • What is the default initial value of the first element in an enumeration?

  • 100
  • 10
  • 0 (correct)
  • 1

    • In an enumeration, how can you change the initial value of the elements?

  • The initial value cannot be changed
  • Create a new enumeration for each different initial value
  • Specify the desired initial value after the element name (correct)
  • Use a separate method to set the initial value

    • What is the default storage type used to hold the values of an enumeration?

    <p>System.Int32</p> Signup and view all the answers

    In an enumeration, do the numerical values need to be unique?

    <p>No, they can be duplicated for multiple elements</p> Signup and view all the answers

    Which of the following best describes the purpose of using an enumeration?

    <p>To create a set of symbolic names mapping to known numerical values</p> Signup and view all the answers

    What does the ToString() method return for an enumeration variable?

    <p>The string name of the current enumeration’s value</p> Signup and view all the answers

    Which method is used to obtain the data type used to store the values of an enumerated type?

    <p>Enum.GetUnderlyingType()</p> Signup and view all the answers

    How do you declare an enum variable in C#?

    <p>Color myColor = Blue;</p> Signup and view all the answers

    What happens if you forget to scope the enum name when assigning a value to an enum variable?

    <p>It will result in a compile error</p> Signup and view all the answers

    What is the purpose of changing the underlying type of an enumeration?

    <p>To decrease the memory usage of the enumeration variable</p> Signup and view all the answers

    What is the result if you set an enum variable to a value not defined directly by the enumerated type?

    <p>It issues a compile error</p> Signup and view all the answers

    How can you obtain the numerical value of an enumeration variable?

    <p>(int)myColor</p> Signup and view all the answers

    Which class provides methods to interrogate and transform a given enumeration?

    <p>.NET.System.Enum</p> Signup and view all the answers

    In which case will forgetting to scope the enum name result in an error?

    <p>When assigning a value to an enum variable</p> Signup and view all the answers

    What does System.Type represent in .NET?

    <p>.NET metadata description</p> Signup and view all the answers

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