Question 1

When an exception occurs,the try block _______.

Accepted Answer

A)  expires 
B)  continues until a matching catch block 
C)  continues until the end of the try block 
D)  None of the above 
A)  expires 
B)  continues until a matching catch block 
C)  continues until the end of the try block 
D)  None of the above A

Question 2

There must be a catch clause for every expected exception type.

Accepted Answer

A) True 
 B)False  False

Question 3

The finally block is an ideal location for code that releases resources to prevent "resource leaks."

Accepted Answer

A) True 
 B)False  True

Question 4

Each Exception should have three constructors: A default constructor,one that receives a string,and one that receives a string and an exception.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is false regarding the throw point of an exception

Accepted Answer

A)  It specifies the point at which the exception must be handled. 
B)  It's the initial point at which the exception occurs. 
C)  It's specified as the top row of the method-call stack at the time the exception occurred. 
D)  All of the above statements are true. 
A)  It specifies the point at which the exception must be handled. 
B)  It's the initial point at which the exception occurs. 
C)  It's specified as the top row of the method-call stack at the time the exception occurred. 
D)  All of the above statements are true.

Question 6

After an exception has occurred and a stack trace has been printed,the program may exit or continue executing,depending on the circumstances.

Accepted Answer

A) True 
 B)False

Question 7

The base class for all exception classes is System.Exception.

Accepted Answer

A) True 
 B)False

Question 8

Runtime exceptions can usually be fixed by eliminating coding errors.

Accepted Answer

A) True 
 B)False

Question 9

Consider the following code segment:
{
Var exampleObject = new ExampleClass();
Try
{
ExampleObject.SomeMethod();
}
Finally
{
If (exampleObject != null)
{
ExampleObject.Dispose();
}
}
}
Which of the following using statements is equivalent to the preceding code segment

Accepted Answer

A)  try using (var exampleObject = new ExampleClass())
{
ExampleObject.SomeMethod(); // do something with exampleObject
} 
B)  using (var exampleObject = new ExampleClass())
{
ExampleObject.SomeMethod(); // do something with exampleObject
} 
C)  using (var exampleObject = new ExampleClass())
{
ExampleObject.SomeMethod(); // do something with exampleObject
ExampleObject.Dispose();
} 
D)  try using (var exampleObject = new ExampleClass())
{
ExampleObject.SomeMethod(); // do something with exampleObject
ExampleObject.Dispose();
} 
A)  try using (var exampleObject = new ExampleClass())
{
ExampleObject.SomeMethod(); // do something with exampleObject
} 
B)  using (var exampleObject = new ExampleClass())
{
ExampleObject.SomeMethod(); // do something with exampleObject
} 
C)  using (var exampleObject = new ExampleClass())
{
ExampleObject.SomeMethod(); // do something with exampleObject
ExampleObject.Dispose();
} 
D)  try using (var exampleObject = new ExampleClass())
{
ExampleObject.SomeMethod(); // do something with exampleObject
ExampleObject.Dispose();
}

Question 10

In order to display the error message generated by an exception,you use:

Accepted Answer

A)  the Message method of class Exception 
B)  the Message property of class Exception 
C)  the ErrorMessage method of class Exception 
D)  the ErrorMessage property of class Exception 
A)  the Message method of class Exception 
B)  the Message property of class Exception 
C)  the ErrorMessage method of class Exception 
D)  the ErrorMessage property of class Exception

Question 11

The constructor method for an exception class should be overloaded to allow the customizing of the display message.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following statements is true

Accepted Answer

A)  The code in a finally block is executed only if an exception occurs. 
B)  The code in a finally block is executed only if an exception does not occur. 
C)  The code in a finally block is executed only if there are no catch blocks. 
D)  None of the above are true. 
A)  The code in a finally block is executed only if an exception occurs. 
B)  The code in a finally block is executed only if an exception does not occur. 
C)  The code in a finally block is executed only if there are no catch blocks. 
D)  None of the above are true.

Question 13

Exceptions can occur:

Accepted Answer

A)  from C#'s CLR 
B)  through explicitly mentioned code in a try block 
C)  through calls to other methods made in a try block 
D)  All of the above 
A)  from C#'s CLR 
B)  through explicitly mentioned code in a try block 
C)  through calls to other methods made in a try block 
D)  All of the above

Question 14

Which of the following statements is false

Accepted Answer

A)  C# 6's null-conditional operator ( 
B)  A nullable type is a value type that also can be null. 
C)  You specify a nullable type by following a value type's name with a question mark ( 
D)  The GetValueOrDefault method checks whether a nullable-type variable contains a value. If so, the method returns that value; otherwise, it returns the value type's default value. 
A)  C# 6's null-conditional operator ( 
B)  A nullable type is a value type that also can be null. 
C)  You specify a nullable type by following a value type's name with a question mark ( 
D)  The GetValueOrDefault method checks whether a nullable-type variable contains a value. If so, the method returns that value; otherwise, it returns the value type's default value.

Question 15

Programmer-defined exception classes typically should contain 3 constructors:

Accepted Answer

A)  a default constructor, a constructor that receives a string for the error message and a constructor that receives an Exception argument of the inner exception object 
B)  a default constructor, a constructor that receives a string and a constructor that receives both a string and an exception 
C)  a constructor that receives a string, a constructor that receives an exception and a constructor that receives both 
D)  a default constructor, a constructor that receives a string and a constructor that receives a number indicating the line number where the exception occurred 
A)  a default constructor, a constructor that receives a string for the error message and a constructor that receives an Exception argument of the inner exception object 
B)  a default constructor, a constructor that receives a string and a constructor that receives both a string and an exception 
C)  a constructor that receives a string, a constructor that receives an exception and a constructor that receives both 
D)  a default constructor, a constructor that receives a string and a constructor that receives a number indicating the line number where the exception occurred

Question 16

Exception handlers typically access objects in their try blocks to deter
mine the causes of the exceptions.

Accepted Answer

A) True 
 B)False

Question 17

An exception is:

Accepted Answer

A)  a problem a computer has during construction 
B)  a problem that a program has during runtime 
C)  something that the computer does not understand 
D)  the way a computer signals to the users that it is about to terminate 
A)  a problem a computer has during construction 
B)  a problem that a program has during runtime 
C)  something that the computer does not understand 
D)  the way a computer signals to the users that it is about to terminate

Question 18

In C#,after an exception is handled,control resumes.This is known as the model of exception handling.

Accepted Answer

A)  after the last catch block, termination 
B)  after the last catch block, resumption 
C)  just after the throw point, termination 
D)  just after the throw point, resumption 
A)  after the last catch block, termination 
B)  after the last catch block, resumption 
C)  just after the throw point, termination 
D)  just after the throw point, resumption

Question 19

Which of the following statements is false

Accepted Answer

A)  The HasValue property returns true if a nullable-type variable contains a value; otherwise, it returns false. 
B)  The Value property returns the nullable-type variable's underlying value. 
C)  The null coalescing operator ( 
D)  All of the above statements are true. 
A)  The HasValue property returns true if a nullable-type variable contains a value; otherwise, it returns false. 
B)  The Value property returns the nullable-type variable's underlying value. 
C)  The null coalescing operator ( 
D)  All of the above statements are true.

Question 20

Which of the following statements is false

Accepted Answer

A)  Exception handling enables programmers to write robust and fault-tolerant programs. 
B)  Exception handling can catch the exception but cannot resolve the exception. 
C)  Exception handling can resolve exceptions. 
D)  There are many ways of handling exceptions. 
A)  Exception handling enables programmers to write robust and fault-tolerant programs. 
B)  Exception handling can catch the exception but cannot resolve the exception. 
C)  Exception handling can resolve exceptions. 
D)  There are many ways of handling exceptions.

Exam 13: Exception Handling: A Deeper Look

When an exception occurs,the try block _______.

There must be a catch clause for every expected exception type.

The finally block is an ideal location for code that releases resources to prevent "resource leaks."

Each Exception should have three constructors: A default constructor,one that receives a string,and one that receives a string and an exception.

Which of the following is false regarding the throw point of an exception

After an exception has occurred and a stack trace has been printed,the program may exit or continue executing,depending on the circumstances.

The base class for all exception classes is System.Exception.

Runtime exceptions can usually be fixed by eliminating coding errors.

Consider the following code segment: { Var exampleObject = new ExampleClass(); Try { ExampleObject.SomeMethod(); } Finally { If (exampleObject != null) { ExampleObject.Dispose(); } } } Which of the following using statements is equivalent to the preceding code segment

In order to display the error message generated by an exception,you use:

The constructor method for an exception class should be overloaded to allow the customizing of the display message.

Which of the following statements is true

Exceptions can occur:

Which of the following statements is false

Programmer-defined exception classes typically should contain 3 constructors:

Exception handlers typically access objects in their try blocks to deter mine the causes of the exceptions.

An exception is:

In C#,after an exception is handled,control resumes.This is known as the model of exception handling.

Which of the following statements is false

Which of the following statements is false

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

Classes and Objects: A Deeper Look

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

GUI With Windows Forms: Part 1

GUI With Windows Forms: Part 2

Strings,Characters and Regular Expressions

Files and Streams

Searching and Sorting

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Asynchronous Programming With Async and Await

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