Question 1

The ____ class has implementations for Write( ) and WriteLine( ) methods similar to the Console class methods.

Accepted Answer

StreamWriter is a class in .NET that provides implementations for the Write() and WriteLine() methods, similar to those in the Console class, for writing characters to a stream.

Question 2

To invoke File's Copy( ) method to make a copy of "source.txt", naming the new file "target.txt", you would write: File.Copy("source.txt", "target.txt"); because Copy is a static member of the File class.

Accepted Answer

Copy is a static member of the File class, so it can be invoked using the class name rather than an instance of the class. Therefore, the correct syntax to invoke it would be File.Copy("source.txt", "target.txt");

Question 3

Instead of hard coding the actual filename and file path, you could prompt the user for the name of the file using subclasses of the FileDialog class.

Accepted Answer

By prompting the user for the name of the file using a subclass of the FileDialog class, we can make the program more dynamic and easily adaptable to different file systems and user preferences. This approach avoids hard coding the actual filename and file path, which can make the program less flexible and harder to maintain.

Question 4

StreamWriter outputFile = new StreamWriter("someOutputFileName");
StreamReader inputFile = new StreamReader("someInputFileName");
The identifier that can be referenced in a WriteLine( ) method with the declaration above is ____.

Accepted Answer

The WriteLine() method is used to write text to a file or a stream. In the given code, "outputFile" is the identifier for the StreamWriter object, which is used to write to files, hence it can be referenced in a WriteLine() method.

Question 5

The StreamReader class is most often used to retrieve single characters, one character at a time, from a file.

Accepted Answer

The StreamReader class is commonly used to read entire lines or blocks of data from a file rather than single characters one at a time.

Question 6

If an invalid path is included with the constructor for a StreamWriter object, ____.

Accepted Answer

If an invalid path is included with the constructor for a StreamWriter object, an IOException exception is thrown.

Question 7

After an application is debugged and you are ready to deploy or distribute it, you can build the most optimized solution,a Release version. To switch to the Release version, select Release from the Solution Configurations list box on the Standard Visual Studio toolbar.

Accepted Answer

This statement is true. You can switch to the Release version by selecting Release from the Solution Configurations list box on the Standard Visual Studio toolbar.

Question 8

Binary files can not be read using notepad.

Accepted Answer

Binary files contain non-textual data and are made up of 0s and 1s, which cannot be read by a text editor like Notepad. Special software or applications are required to decode and interpret binary files.

Question 9

The abstract classes of Stream, TextWriter, and TextReader are defined for dealing with files in the ____ namespace.

Accepted Answer

The abstract classes of Stream, TextWriter, and TextReader are defined in the System.IO namespace for dealing with files. Therefore, option A is the correct choice.

Question 10

Which of the following class belongs to the System.IO namespace?

Accepted Answer

FileNotFoundException belongs to the System.IO namespace.

Question 11

None of the of the  method named in the File and Directory classes are available as instance methods (with the same name) in the FileInfo and DirectoryInfo classes since they are available in File and Directory.

Accepted Answer

This statement is false. Many of the methods in the File and Directory classes are available as instance methods in the FileInfo and DirectoryInfo classes.

Question 12

Every member of the File class is static-meaning methods are called ____.

Accepted Answer

Since every member of the File class is static, methods of the File class are called using the class name.

Question 13

StreamWriter outputFile = new StreamWriter("someOutputFileName");
StreamReader inputFile = new StreamReader("someInputFileName");
If you browse using Windows Explorer or Computer, the physical file that already exists before the two statements from above are executed is ____.

Accepted Answer

The physical file that already exists before the two statements from above are executed is "someInputFile", which is the file being read by the StreamReader. The StreamWriter will create a new file named "someOutputFileName" if it does not already exist.

Question 14

The StreamReader class is used to create text files.

Accepted Answer

The StreamReader class is used to read text files, not create them. To create text files, we use the StreamWriter class.

Question 15

When you close a file, no arguments are sent to the method; however, the Close( ) method must be called with a file object such as fileObjectInFile.Close( ).

Accepted Answer

This statement is true. The Close() method must be called with a file object to close the file, but no arguments need to be passed to the method.

Question 16

No exception is thrown if you attempt to close or open a file that does not exist.

Accepted Answer

Attempting to open a file that does not exist typically results in an exception, such as a `FileNotFoundException` in many programming languages. Similarly, attempting to close a file that was never opened or does not exist might also lead to an exception, depending on the context and language.

Question 17

StreamReader inFile = new StreamReader("name.txt");
While ((inValue = inFile.ReadLine()) != null)
Using the above segment of code, inValue would be defined as what type of data? ​

Accepted Answer

The method ReadLine() of StreamReader returns a string, which is being assigned to the variable inValue of type string. Therefore, the correct answer is D, string.

Question 18

The File, FileInfo, Directory, and DirectoryInfo classes are considered utility classes. They normally work with stream objects, allowing you to manipulate files and directory structures.

Accepted Answer

The File, FileInfo, Directory, and DirectoryInfo classes are utility classes that allow manipulation of files and directory structures through the use of stream objects.

Question 19

StreamReader inFile = new StreamReader("name.txt"); while ((inValue = inFile.ReadLine()) != null)
What does the above statement do?

Accepted Answer

The statement uses a StreamReader object to read each line from the input file "name.txt" until the end of the file is reached (no more lines to read). Therefore, option D is the best choice as it accurately reflects the function of the statement. Options A and B are incorrect because they suggest that only one line or character is retrieved, when in fact, the statement retrieves every line. Option C is incorrect because it does not accurately describe what the statement is doing with the file.

Question 20

When you place an @ in front of a string, the string becomes a(n) ____.

Accepted Answer

When you place an @ in front of a string in C#, it becomes a verbatim string. This means the string is interpreted exactly as it is written, including any escape characters and line breaks.

Quiz 13: Working With Files

The ____ class has implementations for Write( ) and WriteLine( ) methods similar to the Console class methods.

To invoke File's Copy( ) method to make a copy of "source.txt", naming the new file "target.txt", you would write: File.Copy("source.txt", "target.txt"); because Copy is a static member of the File class.

Instead of hard coding the actual filename and file path, you could prompt the user for the name of the file using subclasses of the FileDialog class.

StreamWriter outputFile = new StreamWriter("someOutputFileName") ; StreamReader inputFile = new StreamReader("someInputFileName") ; The identifier that can be referenced in a WriteLine( ) method with the declaration above is ____.

The StreamReader class is most often used to retrieve single characters, one character at a time, from a file.

If an invalid path is included with the constructor for a StreamWriter object, ____.

After an application is debugged and you are ready to deploy or distribute it, you can build the most optimized solution,a Release version. To switch to the Release version, select Release from the Solution Configurations list box on the Standard Visual Studio toolbar.

Binary files can not be read using notepad.

The abstract classes of Stream, TextWriter, and TextReader are defined for dealing with files in the ____ namespace.

Which of the following class belongs to the System.IO namespace?

None of the of the method named in the File and Directory classes are available as instance methods (with the same name) in the FileInfo and DirectoryInfo classes since they are available in File and Directory.

Every member of the File class is static-meaning methods are called ____.

StreamWriter outputFile = new StreamWriter("someOutputFileName") ; StreamReader inputFile = new StreamReader("someInputFileName") ; If you browse using Windows Explorer or Computer, the physical file that already exists before the two statements from above are executed is ____.

The StreamReader class is used to create text files.

When you close a file, no arguments are sent to the method; however, the Close( ) method must be called with a file object such as fileObjectInFile.Close( ).

No exception is thrown if you attempt to close or open a file that does not exist.

StreamReader inFile = new StreamReader("name.txt") ; While ((inValue = inFile.ReadLine() ) != null) Using the above segment of code, inValue would be defined as what type of data?

The File, FileInfo, Directory, and DirectoryInfo classes are considered utility classes. They normally work with stream objects, allowing you to manipulate files and directory structures.

StreamReader inFile = new StreamReader("name.txt") ; while ((inValue = inFile.ReadLine() ) != null) What does the above statement do?

When you place an @ in front of a string, the string becomes a(n) ____.

Quiz 13: Working With Files

The ____ class has implementations for Write( ) and WriteLine( ) methods similar to the Console class methods.

To invoke File's Copy( ) method to make a copy of "source.txt", naming the new file "target.txt", you would write: File.Copy("source.txt", "target.txt"); because Copy is a static member of the File class.

Instead of hard coding the actual filename and file path, you could prompt the user for the name of the file using subclasses of the FileDialog class.

StreamWriter outputFile = new StreamWriter("someOutputFileName") ; StreamReader inputFile = new StreamReader("someInputFileName") ; The identifier that can be referenced in a WriteLine( ) method with the declaration above is ____.

The StreamReader class is most often used to retrieve single characters, one character at a time, from a file.

If an invalid path is included with the constructor for a StreamWriter object, ____.

After an application is debugged and you are ready to deploy or distribute it, you can build the most optimized solution,a Release version. To switch to the Release version, select Release from the Solution Configurations list box on the Standard Visual Studio toolbar.

Binary files can not be read using notepad.

The abstract classes of Stream, TextWriter, and TextReader are defined for dealing with files in the ____ namespace.

Which of the following class belongs to the System.IO namespace?

None of the of the method named in the File and Directory classes are available as instance methods (with the same name) in the FileInfo and DirectoryInfo classes since they are available in File and Directory.

Every member of the File class is static-meaning methods are called ____.

StreamWriter outputFile = new StreamWriter("someOutputFileName") ; StreamReader inputFile = new StreamReader("someInputFileName") ; If you browse using Windows Explorer or Computer, the physical file that already exists before the two statements from above are executed is ____.

The StreamReader class is used to create text files.

When you close a file, no arguments are sent to the method; however, the Close( ) method must be called with a file object such as fileObjectInFile.Close( ).

No exception is thrown if you attempt to close or open a file that does not exist.

StreamReader inFile = new StreamReader("name.txt") ; While ((inValue = inFile.ReadLine() ) != null) Using the above segment of code, inValue would be defined as what type of data? ​

The File, FileInfo, Directory, and DirectoryInfo classes are considered utility classes. They normally work with stream objects, allowing you to manipulate files and directory structures.

StreamReader inFile = new StreamReader("name.txt") ; while ((inValue = inFile.ReadLine() ) != null) What does the above statement do?

When you place an @ in front of a string, the string becomes a(n) ____.

StreamReader inFile = new StreamReader("name.txt") ; While ((inValue = inFile.ReadLine() ) != null) Using the above segment of code, inValue would be defined as what type of data?