Deck 12: Debugging and Handling Exceptions

Question 1

With the Debugger,while in break mode,you can examine expressions to see what values are being generated.

Answer 1

True

Question 2

The catch clause associated with a try...catch can be omitted as long as you have a finally block.

Answer 2

False

Question 3

When an exception is thrown,execution halts in the current method and the CLR attempts to
locate an exception handler to handle the exception.

Answer 3

True

Question 4

Syntax errors are normally associated with programs that run but produce incorrect results.

Question 5

During the compilation stage,the errors that are detected are those that violate the logic of the application.

Question 6

The Visual Studio Debugger provides commands for controlling the execution of your application.

Question 7

An error such as attempting to divide by zero during runtime will always throw an exception.

Question 8

Zero or more than one catch clause may be included with a try clause.

Question 9

If the current method does not contain an exception handler,that method is halted and the program terminates immediately.

Question 10

When an unhandled exception message is displayed,the method that raised the exception is listed last.

Question 11

A stack trace is a listing of all the methods that are in the execution chain when the exception is thrown.

Question 12

In C# the only checked exceptions are IOExceptions.

Question 13

With the Visual Studio debugger,you set a breakpoint by drawing a red circle on the line where the breakpoint should occur.

Question 14

With a generic catch,any type of exception is handled by the catch code.

Question 15

If you write a try...catch clause,you must include a finally block.

Question 16

You should desk check solutions to make sure the program is producing consistently accurate results.

Question 17

Bugs,errors,and exceptions are the same thing.

Question 18

If a try block is included,you must also specify a catch clause.

Question 19

The three commands for stepping through code while you are in break mode are CONTINUE,BREAK,and EXIT.

Question 20

A breakpoint is a point in output that separates correct from incorrect results.

Question 21

A listing of all the methods that are in the execution chain when an exception is thrown is called a(n)____.

A) exception list
B) method list
C) stack trace
D) chain of methods

Question 22

Once an exception is thrown,control is never returned to the try block.

Question 23

____ is/are used to facilitate managing exceptions in a consistent,efficient way.

A) if...else
B) try...catch...finally
C) Event handlers
D) Loops

Question 24

The property of the Exception class that returns a string describing the exception is ____.

A) ExceptionType
B) ExceptionInformation
C) ExceptionData
D) Message

Question 25

When an unexpected error occurs in the try block that throws an exception,control transfers ____.

A) to the finally block
B) back to the first statement in the try clause
C) to the first listed matching catch clause
D) outside the try...catch...finally block

Question 26

If a program works properly with some data,but crashes when a certain value is entered,you have a system error.

Question 27

An attempt to access an element of an array with an index that is outside the bounds of the array throws a ____.

A) System.IndexOutOfRangeException
B) System.ArrayTypeMismatchException
C) System.IndexOutOfBoundsException
D) System.InvalidIndexException

Question 28

Bugs are normally labeled as ____.

A) programmer mistakes
B) logic errors
C) handled exceptions
D) unhandled exceptions

Question 29

Exceptions are unexpected conditions that happen frequently.

Question 30

The code that you want executed,whether an exception is thrown or not,is placed in the ____ block.

A) try
B) catch
C) finally
D) if

Question 31

If several catch clauses are included and one is a generic catch,the generic catch clause should be placed first.

Question 32

Custom exceptions classes must derive from the System.SystemException class.

Question 33

When the CLR handles the exception by halting the application ____.

A) the exception is thrown back to the calling method
B) the Main( ) method is placed in an infinite loop
C) the computer locks up
D) an unhandled exception is reported

Question 34

The Watch window with the Debugger lets you type in one or more variables or expressions that you want to observe while the program is running.

Question 35

If a program encounters an error that it cannot recover from,it ____.

A) elevates the priority level of the program
B) raises or throws an exception
C) terminates immediately
D) locks up the computer

Question 36

You cannot write a catch clause unless you include it within a try block.

Question 37

When defining your own exception classes,you must use the word "Exception" as part of the identifier.

Question 38

When you write your own exceptions,the new class should be derived from ____.

A) Exception
B) System.ApplicationException
C) System.SystemException
D) System.RunTimeException

Question 39

Only one breakpoint can be set in an application.

Question 40

C# adheres to a fairly sophisticated set of rules known as C# Rules for the Language,which are the authoritative source for C# grammar and syntax.

Question 41

There are over 70 classes derived from the SystemException class.Which one of the following is NOT a derived class of the SystemException class?

A) System.ArithmeticException
B) System.IO.IOException
C) System.IndexOutOfRangeException
D) System.ApplicationException

Question 42

Which of the following would not throw an exception?

A) attempting to write to a file that does not exist
B) storing a double value into an int
C) division by zero involving floating-point operands
D) calling a method with an invalid argument

Question 43

Markers placed in an application to indicate the program should halt execution when it reaches that spot is a ____.

A) breakpoint
B) break mode
C) debug point
D) debugger spot

Question 44

When an unhandled exception message is displayed and you click on the Details button in Visual Studio,____.

A) instructions are given about how to recover from the error
B) a stack trace of methods with the method that raised the exception listed first is displayed
C) details about the error including how to halt the program are displayed
D) a stack trace of variables and their values is displayed

Question 45

Which of the following preventive actions might be taken to keep your program from crashing?

A) include if statements that check values used as input
B) run the program in debug mode
C) run the program in break mode
D) input all values as strings

Question 46

An IO.IOException exception is thrown when ____.

A) there are problems with division
B) there are problems loading the contents of a file
C) values are not entered properly
D) an attempt is made to store floating point values in a file

Question 47

An exception handler is a ____.

A) block of code that is executed when an exception occurs
B) Windows event handler
C) menu option under the debugger
D) trace of methods invoked during the problem

Question 48

When you use step commands,the values are automatically updated in the _____window with each new line of code.

A) Watch
B) Exception
C) Error
D) Local

Question 49

The ____ property associated with exception objects returns a string describing the exception.

A) Text
B) Message
C) StackTrace
D) Name

Question 50

All exception classes inherit from the ____ class.

A) SystemException
B) Exception
C) ApplicationException
D) BaseExcecption

Question 51

What order should ArithmeticException,DivideByZeroException,and Exception catch clauses be placed in a try...catch block?

A) ArithmeticException, DivideByZeroException, Exception
B) Exception, ArithmeticException, DivideByZeroException
C) DivideByZeroException, ArithmeticException, Exception
D) Exception, ArithmeticException, DivideByZeroException,

Question 52

While in debug mode,you can look inside a method and examine the method's program statements using ____.

A) Step Out
B) Step Into
C) Step Over
D) Step Inside

Question 53

Which exception class will catch a problem if an attempt is made to access an element stored at location -23 in an array?

A) System.ArrayException
B) Application.ArrayException
C) System.RankException
D) System.IndexOutOfRangeException

Question 54

When more than one catch clause is included,____.

A) the order of the placement of these clauses is important
B) you must write a finally block
C) you must include System.Exception as one of the catch clauses
D) all of the above

Question 55

An exception that must be included if you use a specific construct describes a ____ exception.

A) thrown
B) generic
C) checked
D) caught

Question 56

Writing a catch clause without an argument list ____.

A) is the same as writing catch (System.Exception)
B) is the same as writing a finally block
C) is the same as writing catch (Application.Exception)
D) creates a syntax error

Question 57

If an event that creates a problem happens frequently,it is best to write instructions to take care of the problem with ____.

A) try...catch clauses
B) conditional expressions
C) exceptions
D) try...catch...finally blocks

Question 58

What type of error is associated with a language rule violation?

A) logic
B) bug
C) exception
D) syntax

Question 59

When code is included in all three blocks for the try...catch...finally construct,____.

A) the finally block is never executed
B) only one of the three blocks gets executed
C) the try block is attempted first
D) all catch clauses are executed

Question 60

All of the following are problem associated with using a generic catch and not specifying an Exception class at all,EXCEPT ____.

A) you are never quite sure what
Caused the exception to be thrown
B) you cannot use members like Message to display information about the exception.
C) you cannot keep the program from terminating abnormally
D) you cannot display any error messages identifying the error type

Question 61

Custom exceptions must derive from the ____________ class.

Question 62

A(n)____________ error is associated with a language rule violation.

Question 63

Writing the catch clause without an argument list is the same as writing ____________.

Question 64

Selecting ____________ when you are in Debug mode,causes the program to execute from the halted line until it reaches the next breakpoint,if there is one.

Question 65

____________ are markers that are placed in an application,indicating the program should halt execution when it reaches that point.

Question 66

When you write custom exceptions,instead of the CLR raising the exception,you must write program statements that raise the exception,using the keyword ____________.

Question 67

____________ are unexpected conditions that happen infrequently.

Question 68

____________ as a methodical process of finding and reducing bugs or defects in a computer program.

Question 69

Exception class has several properties.The ____________ property provides details about the cause of the exception.

Question 70

C# adheres to a fairly sophisticated set of rules known as C# ____________.

Question 71

If the current method does not contain an exception handler,that method is halted,and the parent method that called the method that threw the exception attempts to handle the exception.The exception is said to be ____________ to the calling method.

Question 72

A(n)____________ is a listing of all the methods that are in the execution chain when the exception is thrown.

Question 73

If you are filtering multiple exceptions,the order of placement of the exception clauses is important.If you are including the Exception class,it should always be placed ____________.

Question 74

When an application is developed,it is extremely important to ____________ the solutions to make sure the program is producing consistently accurate results.

Question 75

A(n)____________ exception is thrown for the following types of unexpected errors: a specified file or directory is not found,your program attempts to read beyond the end of a file,or there are problems loading or accessing the contents of a file.