Tag: .net

Questions Related to .net

The name of the class used to programmatically create a color dialog box is:

.net

  1. Color

  2. ColorBox

  3. ColorDialog

  4. ColorDisplay

  5. ColorDisplayBox

Show answer
Correct Option: C

AI Explanation

To answer this question, you need to have knowledge of programming and user interfaces. The correct answer is C) ColorDialog.

Explanation:

Option A) Color - This option is incorrect because the Color class is used to represent colors in programming, but it is not used specifically to create a color dialog box.

Option B) ColorBox - This option is incorrect because there is no standard class named ColorBox in programming that is used to create a color dialog box.

Option C) ColorDialog - This option is correct because the ColorDialog class is commonly used in programming to create a color dialog box. This class provides functionality for selecting a color from a predefined set of colors or a custom color picker.

Option D) ColorDisplay - This option is incorrect because there is no standard class named ColorDisplay in programming that is used to create a color dialog box.

Option E) ColorDisplayBox - This option is incorrect because there is no standard class named ColorDisplayBox in programming that is used to create a color dialog box.

The correct answer is C) ColorDialog. This option is correct because the ColorDialog class is specifically designed to create a color dialog box in programming.

The name of the class used to programmatically create a font dialog box is:

.net

  1. Font.

  2. FontBox.

  3. FontDialog.

  4. FontDisplay.

  5. FontDialogBox.

Show answer
Correct Option: C
Explanation:

To solve this question, the user needs to be familiar with the concept of creating dialog boxes and specifically, the font dialog box.

Now, let's go through each option and explain why it is right or wrong:

A. Font: This option is incorrect because the name "Font" does not indicate that it is specifically used for creating a font dialog box. It may refer to a class related to font manipulation, but not to the creation of a font dialog box.

B. FontBox: This option is incorrect because, similar to option A, the name "FontBox" does not specifically indicate that it is used to create a font dialog box. It may refer to a class related to font manipulation, but not to the creation of a font dialog box.

C. FontDialog: This option is correct. The name "FontDialog" specifically indicates that this class is used to create a font dialog box. It is a common naming convention in programming to use descriptive names for classes, and in this case, "FontDialog" accurately describes the purpose of the class.

D. FontDisplay: This option is incorrect because the name "FontDisplay" does not specifically indicate that it is used to create a font dialog box. It may refer to a class related to font display, but not to the creation of a font dialog box.

E. FontDialogBox: This option is incorrect because the name "FontDialogBox" is not a standard naming convention for the class used to create a font dialog box. The commonly used name is "FontDialog".

Therefore, the correct answer is:

C. FontDialog.

Which OpenFileDialog control property specifies the choices in the "Files of type" dropdown box?

.net

  1. FileName

  2. FileNames

  3. FileType

  4. Filter

  5. FilterIndex

Show answer
Correct Option: D
Explanation:

To answer this question, the user needs to have knowledge of the OpenFileDialog control and its properties.

The OpenFileDialog control is a common dialog box provided by the .NET framework that allows users to browse and select files from the file system.

Now, let's go through each option and explain whether it specifies the choices in the "Files of type" dropdown box:

A. FileName: This property represents the name of the file selected in the dialog box. It does not specify the choices in the "Files of type" dropdown box.

B. FileNames: This property represents an array of file names selected in the dialog box. It does not specify the choices in the "Files of type" dropdown box.

C. FileType: This property does not exist in the OpenFileDialog control. Therefore, it does not specify the choices in the "Files of type" dropdown box.

D. Filter: This property specifies the filter string that determines the choices in the "Files of type" dropdown box. It allows you to specify the types of files that can be selected in the dialog box based on their extensions.

E. FilterIndex: This property specifies the index of the default filter to display in the "Files of type" dropdown box. It does not specify the choices in the dropdown box itself.

Therefore, the correct answer is:

D. Filter

Which property is the same in the OpenFileDialog and the SaveFileDialog control?

.net

  1. FileName

  2. Filter

  3. InitialDirectory

  4. Both a and b.

  5. All of the above.

Show answer
Correct Option: E

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) FileName - This option is correct because both the OpenFileDialog and the SaveFileDialog controls have a FileName property. This property allows the user to specify or retrieve the file name and path selected or entered in the dialog box.

Option B) Filter - This option is correct because both the OpenFileDialog and the SaveFileDialog controls have a Filter property. This property allows the user to specify the file types that are displayed in the dialog box.

Option C) InitialDirectory - This option is correct because both the OpenFileDialog and the SaveFileDialog controls have an InitialDirectory property. This property allows the user to specify the initial directory that is displayed in the dialog box.

Option D) Both a and b - This option is incorrect because it only includes the FileName and Filter properties, but does not include the InitialDirectory property.

Option E) All of the above - This option is correct because it includes all three properties: FileName, Filter, and InitialDirectory. All these properties are present in both the OpenFileDialog and the SaveFileDialog controls.

The correct answer is E. All of the above. This option is correct because all three properties - FileName, Filter, and InitialDirectory - are present in both the OpenFileDialog and the SaveFileDialog controls.

Which method is found in both the StreamReader and StreamWriter class?
.net

  1. Close

  2. Peak

  3. Flush

  4. Both a and b.

  5. All of the above.

Show answer
Correct Option: A
Explanation:

To solve this question, the user needs to have a basic understanding of the StreamReader and StreamWriter classes in .NET.

Option A: Close - This method is found in both the StreamReader and StreamWriter classes. It is used to close the underlying stream and free up any resources associated with it.

Option B: Peek - This method is not found in both the StreamReader and StreamWriter classes. It is only found in the StreamReader class and is used to return the next available character without reading it from the underlying stream.

Option C: Flush - This method is found in both the StreamReader and StreamWriter classes. It is used to flush the buffer and write any remaining data to the underlying stream.

Option D: Both A and B - This option is incorrect because option B is not found in both the StreamReader and StreamWriter classes.

Option E: All of the above - This option is incorrect because option B is not found in both the StreamReader and StreamWriter classes.

Therefore, the correct answer is:

The Answer is: A. Close.

The StreamReader and StreamWriter class are both subclasses of which class?

.net

  1. IO

  2. Stream

  3. StreamIO

  4. Both a and b.

  5. All of the above.

Show answer
Correct Option: B

AI Explanation

To answer this question, we need to understand the relationship between the StreamReader and StreamWriter classes and their superclass.

Option A) IO - This option is incorrect because the StreamReader and StreamWriter classes are not subclasses of the IO class.

Option B) Stream - This option is correct because both the StreamReader and StreamWriter classes are subclasses of the Stream class. The Stream class is an abstract class in the System.IO namespace that provides a generic view of a sequence of bytes. It serves as the base class for all stream classes in .NET.

Option C) StreamIO - This option is incorrect because there is no class named StreamIO in the .NET framework.

Option D) Both a and b - This option is incorrect because the correct answer is only option B (Stream). The StreamReader and StreamWriter classes are subclasses of the Stream class, not the IO class.

Option E) All of the above - This option is incorrect because option B (Stream) is the correct answer, while options A (IO) and C (StreamIO) are incorrect.

Therefore, the correct answer is B) Stream.

Which dialog control allows the user to zoom in on a document?

.net

  1. PrintDialog

  2. PrintPreview

  3. PageSetupDialog

  4. Both a and b.

  5. All of the above.

Show answer
Correct Option: B

Which dialog control has a Document property?

.net

  1. PrintDialog

  2. PrintPreview

  3. PageSetupDialog

  4. Both a and b.

  5. All of the above.

Show answer
Correct Option: E
Explanation:

The Document property is a property of dialog controls that allows you to access the document that is being printed, previewed, or set up. All three of the dialog controls listed in the question have a Document property. Therefore, the correct answer is E. All of the above.

Explanation for Option A:

The PrintDialog dialog control is used to print a document. The Document property of the PrintDialog dialog control returns a reference to the document that is being printed.

Explanation for Option B:

The PrintPreview dialog control is used to preview a document before it is printed. The Document property of the PrintPreview dialog control returns a reference to the document that is being previewed.

Explanation for Option C:

The PageSetupDialog dialog control is used to set up the page layout for a document. The Document property of the PageSetupDialog dialog control returns a reference to the document that is being set up.

Correct Answer:

The correct answer is E. All of the above. This is because all three of the dialog controls listed in the question have a Document property.

Which object must be assigned to the Document property?

.net

  1. Document

  2. DocumentPage

  3. DocumentPrint

  4. PageDocument

  5. PrintDocument

Show answer
Correct Option: E

When is the PrintPage event activated?

.net

  1. When the PrintDialog control is displayed.

  2. When an assignment is made to the Document property.

  3. The first time the Print method is called.

  4. Every time a page is printed after the Print method is called.

  5. None of the above.

Show answer
Correct Option: D

AI Explanation

To answer this question, we need to understand the concept of the PrintPage event in the context of programming.

The PrintPage event is a part of the printing process in programming. It is raised for each page to be printed, and it allows you to specify the content and layout of each page.

Now, let's go through each option to understand why it is correct or incorrect:

Option A) When the PrintDialog control is displayed - This option is incorrect because the PrintPage event is not activated when the PrintDialog control is displayed. The PrintPage event is specific to the printing process and is independent of the display of the PrintDialog control.

Option B) When an assignment is made to the Document property - This option is incorrect because assigning a value to the Document property does not activate the PrintPage event. The PrintPage event is triggered during the printing process, not when assigning a document to be printed.

Option C) The first time the Print method is called - This option is incorrect because the PrintPage event is not activated the first time the Print method is called. The PrintPage event is raised for each page to be printed, not just the first time the Print method is called.

Option D) Every time a page is printed after the Print method is called - This option is correct because the PrintPage event is activated for every page that is printed after the Print method is called. The PrintPage event is raised for each page, allowing you to specify the content and layout of each page.

Option E) None of the above - This option is incorrect because option D is the correct answer. The PrintPage event is activated every time a page is printed after the Print method is called.

Therefore, the correct answer is Option D. The PrintPage event is activated every time a page is printed after the Print method is called.