Question 1

The _________ of a class are also called the public services or the public interface of the class.

Accepted Answer

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

Question 2

Consider the statement:
Throw new ArgumentOutOfRangeException(0);
Which of the following statements is false

Accepted Answer

A)  For values outside proper ranges, an app can throw an exception of type ArgumentOutOfRangeException (namespace System), which notifies the client code that an invalid argument was passed to the method. 
B)  This throw statement creates a new object of type ArgumentOutOfRangeException. 
C)  The parentheses following the class name indicate a call to the ArgumentOutOfRangeException constructor. 
D)  After the exception object is created, the statement after the throw statement is executed-this is called the resumption model of exception handling. 
A)  For values outside proper ranges, an app can throw an exception of type ArgumentOutOfRangeException (namespace System), which notifies the client code that an invalid argument was passed to the method. 
B)  This throw statement creates a new object of type ArgumentOutOfRangeException. 
C)  The parentheses following the class name indicate a call to the ArgumentOutOfRangeException constructor. 
D)  After the exception object is created, the statement after the throw statement is executed-this is called the resumption model of exception handling. D

Question 3

The Object Browser _____________.

Accepted Answer

A)  lists all the classes in the C# library 
B)  describes the functionality provided by a specific class 
C)  is separated into 3 frames 
D)  All of the above. 
A)  lists all the classes in the C# library 
B)  describes the functionality provided by a specific class 
C)  is separated into 3 frames 
D)  All of the above. D

Question 4

Methods that overload binary operators must take two arguments.

Accepted Answer

A) True 
 B)False

Question 5

A constructor should return either true or false to determine if the object was initialized properly.

Accepted Answer

A) True 
 B)False

Question 6

You cannot validate values assigned to properties using an object initializer.

Accepted Answer

A) True 
 B)False

Question 7

A constructor may not have a return value.

Accepted Answer

A) True 
 B)False

Question 8

Failure to release resources when the program is no longer using them can cause
________.

Accepted Answer

A)  buffer overflows 
B)  resource leaks 
C)  exceptions 
D)  None of the above. 
A)  buffer overflows 
B)  resource leaks 
C)  exceptions 
D)  None of the above.

Question 9

Composition is a form of software reuse.

Accepted Answer

A) True 
 B)False

Question 10

Composition is sometimes referred to as a(n)________.

Accepted Answer

A)  is-a relationship 
B)  has-a relationship 
C)  have-a relationship 
D)  one-to-many relationship 
A)  is-a relationship 
B)  has-a relationship 
C)  have-a relationship 
D)  one-to-many relationship

Question 11

Instances of a class are called class variables.

Accepted Answer

A) True 
 B)False

Question 12

An object's this reference refers to:

Accepted Answer

A)  the object itself 
B)  what the programmer assigned to this 
C)  the entry point of the program 
D)  None of the above. 
A)  the object itself 
B)  what the programmer assigned to this 
C)  the entry point of the program 
D)  None of the above.

Question 13

Which of the following statements is true

Accepted Answer

A)  Methods and instance variables can be public, protected or private. 
B)  Information hiding is achieved by restricting access to class members via keyword public. 
C)  The public members of a class are not directly accessible to the client of a class. 
D)  None of the above is true. 
A)  Methods and instance variables can be public, protected or private. 
B)  Information hiding is achieved by restricting access to class members via keyword public. 
C)  The public members of a class are not directly accessible to the client of a class. 
D)  None of the above is true.

Question 14

An object initializer list cannot be empty.

Accepted Answer

A) True 
 B)False

Question 15

C# is like C++ in that programmers must manage memory explicitly.

Accepted Answer

A) True 
 B)False

Question 16

The use of references to objects of preexisting classes as members of new objects is called

Accepted Answer

A)  inheritance 
B)  composition 
C)  polymorphism 
D)  None of the above. 
A)  inheritance 
B)  composition 
C)  polymorphism 
D)  None of the above.

Question 17

Variables that are static have class scope.

Accepted Answer

A) True 
 B)False

Question 18

A static method may access static and non-static members.

Accepted Answer

A) True 
 B)False

Question 19

The public methods of a class present the services that a class provides.

Accepted Answer

A) True 
 B)False

Question 20

Each object of a class has its own copy of all the instance variables of the class.

Accepted Answer

A) True 
 B)False

Exam 10: Classes and Objects: A Deeper Look

The _________ of a class are also called the public services or the public interface of the class.

Consider the statement: Throw new ArgumentOutOfRangeException(0); Which of the following statements is false

The Object Browser _____________.

Methods that overload binary operators must take two arguments.

A constructor should return either true or false to determine if the object was initialized properly.

You cannot validate values assigned to properties using an object initializer.

A constructor may not have a return value.

Failure to release resources when the program is no longer using them can cause ________.

Composition is a form of software reuse.

Composition is sometimes referred to as a(n)________.

Instances of a class are called class variables.

An object's this reference refers to:

Which of the following statements is true

An object initializer list cannot be empty.

C# is like C++ in that programmers must manage memory explicitly.

The use of references to objects of preexisting classes as members of new objects is called

Variables that are static have class scope.

A static method may access static and non-static members.

The public methods of a class present the services that a class provides.

Each object of a class has its own copy of all the instance variables of the class.

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

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