Podcast
Questions and Answers
Fields are declared outside a class declaration.
Fields are declared outside a class declaration.
False (B)
To type a decimal literal, you must type the letter ________ at the end of a real number.
To type a decimal literal, you must type the letter ________ at the end of a real number.
M or m
After defining a property, you must call the get and set accessors to manipulate it.
After defining a property, you must call the get and set accessors to manipulate it.
False (B)
The order in which methods are declared in a class declaration determines when those methods are called at execution time.
The order in which methods are declared in a class declaration determines when those methods are called at execution time.
Which of the following list correctly orders which type has fewest to the most significant digits?
Which of the following list correctly orders which type has fewest to the most significant digits?
How can a private variable be accessed?
How can a private variable be accessed?
A class diagram helps you design a class, so it is required to show every implementation detail.
A class diagram helps you design a class, so it is required to show every implementation detail.
Which of the following simple types should be used for monetary values?
Which of the following simple types should be used for monetary values?
An object's property can have which of the following accessors?
An object's property can have which of the following accessors?
Which of the following method headers does the following method call match? Action("This is an example, 15, 25.5")
Which of the following method headers does the following method call match? Action("This is an example, 15, 25.5")
Each object of a class is identical except for the values and references it holds.
Each object of a class is identical except for the values and references it holds.
A ________ is called to initialize a new instance of a class.
A ________ is called to initialize a new instance of a class.
In general, how many classes are there in a program/app?
In general, how many classes are there in a program/app?
Let z represent a format specifier. How is the format specifier included in WriteLine?
Let z represent a format specifier. How is the format specifier included in WriteLine?
How would the following method header be represented in a UML class diagram? public void DisplayMessage(string coursename);
How would the following method header be represented in a UML class diagram? public void DisplayMessage(string coursename);
C# is known as an extensible language because it declares all classes ahead of time.
C# is known as an extensible language because it declares all classes ahead of time.
What is the difference between a float and a double?
What is the difference between a float and a double?
By including only the get accessor, the private variable can be assigned a new value.
By including only the get accessor, the private variable can be assigned a new value.
Which method converts a string into an int?
Which method converts a string into an int?
UML represents instance variables and properties as attributes by listing the attribute name followed by a colon and the attribute type.
UML represents instance variables and properties as attributes by listing the attribute name followed by a colon and the attribute type.
Study Notes
Fields and Properties
- Fields are declared within a class declaration, not outside.
- Properties can be accessed via get and set accessors without needing to call them explicitly.
- A property without a set accessor is read-only, preventing assignment of new values.
Literal Types and Formatting
- Decimal literals require 'M' or 'm' at the end of real numbers to specify their type.
- The format specifier in WriteLine is included using the syntax
{ 0:z }.
Data Types and Usage
- The correct order of data types from fewest to most significant digits is: float, double, decimal.
- For monetary values, the recommended type is decimal due to precision.
- Double variables are preferred for larger magnitude and finer detail compared to floats.
Class Structure and Diagrams
- Class diagrams do not need to show every implementation detail; they help in the design process.
- Each object of a class is unique based on the values and references it holds, despite sharing the same structure.
Access Modifiers and Methods
- Private variables can be accessed from within the same class, through properties, or specific methods of the class.
- An object's property can utilize both get and set accessors to manage its value.
- Method signatures in UML are represented with a '+' followed by the method name and parameter types.
Constructors and Class Relationships
- A constructor is used to initialize a new instance of a class.
- Programs or applications typically consist of one or more classes.
Type Conversion
- Strings can be converted into integers using the method
Convert.ToInt32.
Truth Statements
- UML notation represents instance variables and properties as attributes, marking them as true.
- Statements about class properties and the nature of C# as an extensible language can vary, indicating specific features or misconceptions in understanding.
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Description
This quiz covers essential concepts in C# programming, including class structures, data types, and properties. Understand the differences between fields and properties, the significance of literal types, and the proper usage of data types for different needs.
