Question 1

Keyword _______ is used to indicate a method overloads a specific operator.

Accepted Answer

A)  implement 
B)  operator 
C)  overload 
D)  op 
A)  implement 
B)  operator 
C)  overload 
D)  op

Question 2

Developers use the Object Browser to learn about the functionality provided by a specific class.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following class members should usually be private

Accepted Answer

A)  methods 
B)  constructors 
C)  variables 
D)  All of the above 
A)  methods 
B)  constructors 
C)  variables 
D)  All of the above

Question 4

An object initializer calls the default constructor before executing.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following statements is false

Accepted Answer

A)  Extension methods add functionality to a type by modifying the type's source code. 
B)  LINQ capabilities are implemented as extension methods. 
C)  Preceding an object parameter that's the first parameter in the method header with the this keyword indicates that the method extends an existing type. The compiler uses this information to add code into the compiled program that enables extension methods to work with existing types. 
D)  The type of an extension method's first parameter specifies the type that you're extending. 
A)  Extension methods add functionality to a type by modifying the type's source code. 
B)  LINQ capabilities are implemented as extension methods. 
C)  Preceding an object parameter that's the first parameter in the method header with the this keyword indicates that the method extends an existing type. The compiler uses this information to add code into the compiled program that enables extension methods to work with existing types. 
D)  The type of an extension method's first parameter specifies the type that you're extending.

Question 6

Which statement is false

Accepted Answer

A)  The actual data representation used within the class is of no concern to the class's clients. 
B)  Clients generally care about what the class does but not how the class does it. 
C)  Clients are usually involved in a class's implementation. 
D)  Hiding the implementation reduces the possibility that other program parts will become dependent on class-implementation details. 
A)  The actual data representation used within the class is of no concern to the class's clients. 
B)  Clients generally care about what the class does but not how the class does it. 
C)  Clients are usually involved in a class's implementation. 
D)  Hiding the implementation reduces the possibility that other program parts will become dependent on class-implementation details.

Question 7

Overloaded operator methods must be declared public and ________.

Accepted Answer

A)  sealed 
B)  protected 
C)  static 
D)  None of the above. 
A)  sealed 
B)  protected 
C)  static 
D)  None of the above.

Question 8

Object initializers (which initialize an object and its properties)use what syntax

Accepted Answer

A)  new className(property1 - > value1, …); 
B)  new className(property1 = value1, …); 
C)  new className{property1 = value1, …}; 
D)  className{property1 = value1, …}; 
A)  new className(property1 - > value1, …); 
B)  new className(property1 = value1, …); 
C)  new className{property1 = value1, …}; 
D)  className{property1 = value1, …};

Question 9

C# invokes the appropriate constructor by matching the number,types and order of the parameters in the constructor call to those in each constructor definition.

Accepted Answer

A) True 
 B)False

Question 10

this is often used to distinguish between a local variable and class variable that share an identical name.

Accepted Answer

A) True 
 B)False

Question 11

Having a this reference allows:

Accepted Answer

A)  A method to refer explicitly to the instance variables and other methods of the object on which the method was called. 
B)  A method to refer implicitly to the instance variables and other methods of the object on which the method was called. 
C)  An object to reference itself. 
D)  All of the above. 
A)  A method to refer explicitly to the instance variables and other methods of the object on which the method was called. 
B)  A method to refer implicitly to the instance variables and other methods of the object on which the method was called. 
C)  An object to reference itself. 
D)  All of the above.

Question 12

Variables declared within class methods are called instance variables.

Accepted Answer

A) True 
 B)False

Question 13

Attempting to overload a constructor with another constructor that has the exact same signature (name and parameters)is a compilation error.

Accepted Answer

A) True 
 B)False

Question 14

Object orientation uses classes to:

Accepted Answer

A)  develop algorithms 
B)  encapsulate data and methods 
C)  organize large amounts of data 
D)  None of the above. 
A)  develop algorithms 
B)  encapsulate data and methods 
C)  organize large amounts of data 
D)  None of the above.

Question 15

A constructor may not call other methods.

Accepted Answer

A) True 
 B)False

Question 16

An attempt by a method which is not a member of a particular class to access a pri
vate member of that class is a fatal runtime error.

Accepted Answer

A) True 
 B)False

Question 17

Variables or methods declared with access modifier public are accessible wherever the program has a reference to an object of the class.

Accepted Answer

A) True 
 B)False

Question 18

Complex numbers have the form
RealPart + imaginaryPart * i
Where i is the square root of -1.Which of the following statements is false

Accepted Answer

A)  C#'s simple numeric types are value types. 
B)  To mimic the simple numeric types, we can define ComplexNumber as a value type by using a struct (short for "structure") rather than a class. 
C)  C#'s simple types like int and double are actually aliases for struct types. 
D)  Microsoft recommends using structs for most new types, but recommends a class if the type represents a single value. 
A)  C#'s simple numeric types are value types. 
B)  To mimic the simple numeric types, we can define ComplexNumber as a value type by using a struct (short for "structure") rather than a class. 
C)  C#'s simple types like int and double are actually aliases for struct types. 
D)  Microsoft recommends using structs for most new types, but recommends a class if the type represents a single value.

Question 19

A constructor cannot:

Accepted Answer

A)  be overloaded. 
B)  initialize variables to their defaults. 
C)  specify return types or return values. 
D)  have the same name as the class. 
A)  be overloaded. 
B)  initialize variables to their defaults. 
C)  specify return types or return values. 
D)  have the same name as the class.

Question 20

Every class must have at east one constructor.

Accepted Answer

A) True 
 B)False

Exam 10: Classes and Objects: A Deeper Look

Keyword _______ is used to indicate a method overloads a specific operator.

Developers use the Object Browser to learn about the functionality provided by a specific class.

Which of the following class members should usually be private

An object initializer calls the default constructor before executing.

Which of the following statements is false

Which statement is false

Overloaded operator methods must be declared public and ________.

Object initializers (which initialize an object and its properties)use what syntax

C# invokes the appropriate constructor by matching the number,types and order of the parameters in the constructor call to those in each constructor definition.

this is often used to distinguish between a local variable and class variable that share an identical name.

Having a this reference allows:

Variables declared within class methods are called instance variables.

Attempting to overload a constructor with another constructor that has the exact same signature (name and parameters)is a compilation error.

Object orientation uses classes to:

A constructor may not call other methods.

An attempt by a method which is not a member of a particular class to access a pri vate member of that class is a fatal runtime error.

Variables or methods declared with access modifier public are accessible wherever the program has a reference to an object of the class.

Complex numbers have the form RealPart + imaginaryPart * i Where i is the square root of -1.Which of the following statements is false

A constructor cannot:

Every class must have at east one constructor.

Introduction to Computers, the Internet and Visual C#

Dive Into Visual Studio Community

Introduction to C# Apps

Introduction to Classes,Objects,Methods and Strings

Control Statements: Part 1

Control Statements: Part 2

Methods: a Deeper Look

Arrays;Introduction to Exception Handling

Introduction to Linq and Generic Collections

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling: A Deeper Look

GUI With Windows Forms: Part 1

GUI With Windows Forms: Part 2

Strings,Characters and Regular Expressions

Files and Streams

Searching and Sorting

Data Structures

Generics

Collections

Databases and LING

Asynchronous Programming With Async and Await

XML

GUI With Windows Presentation Foundation

Filters