Window Form With C# For Aptech Accp 2007
Forms are the base unit of Windows applications, so they are essential to know about. They are enhanced with controls to create user interfaces and to manipulate data. How much do you know about Windows form with regards to C#?
Questions and Answers
- 1.
The DataAdapter is used to link the DataSet to the data source.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The DataAdapter is a class in ADO.NET that is used to establish a connection between a DataSet and a data source. It acts as a bridge between the two, allowing the DataSet to retrieve and update data from the data source. Therefore, the statement that the DataAdapter is used to link the DataSet to the data source is correct.Rate this question:
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- 2.
The SqlDataAdapter is used to edit data in the sql server database and update DataSet.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The SqlDataAdapter is used to retrieve and manipulate data from a SQL Server database, but it is not specifically used for editing data or updating a DataSet. It is primarily used for populating a DataSet or DataTable with data from the database. To edit data in a SQL Server database and update a DataSet, other classes such as SqlCommand and SqlConnection would be used in conjunction with the SqlDataAdapter. Therefore, the statement is false.Rate this question:
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- 3.
The OleDbDataAdapter class is used to connect to multiple databases such as SQL, Oracle and MS Access.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The OleDbDataAdapter class is a part of the ADO.NET framework and is specifically designed to connect to multiple databases such as SQL, Oracle, and MS Access. It provides a way to retrieve and manipulate data from these databases using the OleDb data provider. Therefore, the statement "The OleDbDataAdapter class is used to connect to multiple databases such as SQL, Oracle and MS Access" is true.Rate this question:
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- 4.
The AccepChangesDuringFill property indicates how the DataReader object is used to fill the DataSet.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The AccepChangesDuringFill property does not indicate how the DataReader object is used to fill the DataSet. It is a property of the DataSet class that determines whether changes made to the data in the DataSet should be marked as "accepted" or not.Rate this question:
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- 5.
The Fill() method uses the DataSet name to add or refresh rows in the DataSet to match with those in the data source.
- A.
True
- B.
Fasle
Correct Answer
A. TrueExplanation
The Fill() method is used to add or refresh rows in the DataSet to match with those in the data source. By using the DataSet name, the Fill() method ensures that the rows in the DataSet are synchronized with the data source, allowing for accurate and up-to-date data retrieval and manipulation. Therefore, the statement "The Fill() method uses the DataSet name to add or refresh rows in the DataSet to match with those in the data source" is true.Rate this question:
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- 6.
Links a DataSet to the MS Access database for retrieving and saving data.
- A.
OleDbDataAdapter
- B.
SqlDataAdapter
Correct Answer
A. OleDbDataAdapterExplanation
The OleDbDataAdapter class is used to link a DataSet to an MS Access database for retrieving and saving data. It provides methods for executing SQL commands and retrieving data from the database into the DataSet, as well as updating the database with changes made in the DataSet. Therefore, OleDbDataAdapter is the correct answer for this question.Rate this question:
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- 7.
Links a DataSet to the SQL database for retrieving and saving data.
- A.
OleDbDataAdapter
- B.
SqlDataAdapter
Correct Answer
B. SqlDataAdapterExplanation
SqlDataAdapter is the correct answer because it is a class in the .NET framework that is used to link a DataSet to a SQL database for retrieving and saving data. It provides methods for executing SQL commands and populating the DataSet with the results. This allows developers to easily interact with a SQL database and manipulate data using the DataSet object. OleDbDataAdapter, on the other hand, is used for accessing data from different types of databases, such as Microsoft Access.Rate this question:
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- 8.
Store the SQL query results in DataTable object.
- A.
SqlDataAdapter
- B.
OledbDataAdapter
Correct Answer
A. SqlDataAdapterExplanation
The SqlDataAdapter class in .NET is used to store the results of an SQL query in a DataTable object. It provides a way to fill a DataTable or DataSet with the data retrieved from a database, and also allows for updating the database with any changes made to the DataTable. Therefore, using SqlDataAdapter is the correct way to store the SQL query results in a DataTable object.Rate this question:
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- 9.
Connect to multiple databases such as Sybase and Oracle.
- A.
OledbDataAdapter
- B.
SqlDataAdapter
Correct Answer
A. OledbDataAdapterExplanation
The OledbDataAdapter is capable of connecting to multiple databases such as Sybase and Oracle. It is a data adapter that is specifically designed to work with OLE DB data sources, which allows it to connect to various types of databases including Sybase and Oracle. Therefore, it is the correct answer for the given question.Rate this question:
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- 10.
The typed DataSet is inherited from the DataSet class.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because a typed DataSet is indeed inherited from the DataSet class. A typed DataSet is a subclass of the DataSet class that provides additional functionality by generating a class for each table and column in the dataset. This allows for type-safe access to the data within the dataset, making it easier to work with and manipulate the data.Rate this question:
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- 11.
The ReadXml() method is used to update the xml file.
- A.
True
- B.
Fasle
Correct Answer
B. FasleExplanation
The given statement is incorrect. The ReadXml() method is not used to update the XML file. Instead, it is used to read and load the data from an XML file into a dataset or datatable.Rate this question:
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- 12.
The MoveNext() method of the BindingSource clas is used to navigate to a record in the DataSet.
- A.
True
- B.
Fasle
Correct Answer
A. TrueExplanation
The MoveNext() method of the BindingSource class allows the user to move to the next record in the DataSet. This method is commonly used in data binding scenarios where the user needs to navigate through a set of records. By calling MoveNext(), the user can easily move to the next record and display its data. Therefore, the given answer "True" is correct.Rate this question:
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- 13.
The type DataSet is used to catch any wrong values fetched from a table.
- A.
True
- B.
Fasle
Correct Answer
B. Fasle -
- 14.
The untype dataset is used on data that does not have static or predicable structure.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because untype datasets are used for data that does not have a static or predictable structure. In other words, untype datasets are flexible and can handle various types of data without predefined schemas or structures. This allows for more versatility in analyzing and processing data that may not conform to a specific format or pattern.Rate this question:
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- 15.
This property specifies or retrieve the locale information used to compare strings in the table.
- A.
Readxml
- B.
Clear
- C.
GetType
- D.
Locale
- E.
DataSetName
Correct Answer
D. LocaleExplanation
The property "Locale" is used to specify or retrieve the locale information used for comparing strings in a table. This means that it determines the rules and conventions for comparing and sorting strings based on the specified locale. By setting the locale, the comparison of strings can be customized to match the desired language or cultural conventions.Rate this question:
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- 16.
This property specifies or retrieves the DataSet name.
- A.
Readxml
- B.
Clear
- C.
Locale
- D.
GetType
- E.
DataSetName
Correct Answer
E. DataSetNameExplanation
The correct answer is "DataSetName". This property is used to specify or retrieve the name of a DataSet. It is commonly used when working with multiple datasets or when referencing a specific dataset within a program. By setting or accessing the DataSetName property, developers can easily identify and manipulate specific datasets within their code.Rate this question:
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- 17.
This method removes rows in all tables.
- A.
DataSetName
- B.
Clear
- C.
GetType
- D.
Locale
- E.
Readxml
Correct Answer
B. ClearExplanation
The "Clear" method is used to remove all rows in all tables within a dataset. This means that it clears the data stored in the dataset, making it empty. The other options listed (GetType, Locale, Readxml) do not perform this action of removing rows in all tables. Therefore, the correct answer is "Clear".Rate this question:
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- 18.
This method retrieves the type of the current instance.
- A.
Readxml
- B.
Locale
- C.
GetType
- D.
Clear
- E.
DataSetName
Correct Answer
C. GetTypeExplanation
The correct answer is "GetType". This method is used to retrieve the type of the current instance. It returns a Type object that represents the exact runtime type of the current instance.Rate this question:
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- 19.
This method retrieves xml schema and data into the DataSet.
- A.
Locale
- B.
DataSetName
- C.
ReadXml
- D.
Clear
- E.
GetType
Correct Answer
C. ReadXmlExplanation
The ReadXml method is used to retrieve XML schema and data into a DataSet. It allows the DataSet to read and populate its tables with the XML data. This method is commonly used when working with XML data sources and provides a convenient way to import and manipulate XML data within a DataSet.Rate this question:
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- 20.
The DataTable object is used to as a case- sensitive object if the casing of two tables with the same name differs.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The DataTable object is used as a case-sensitive object, meaning that it considers the casing of two tables with the same name to be different. This means that if there are two tables named "Table1" and "table1", the DataTable object will treat them as separate tables.Rate this question:
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- 21.
The DataRow and DataColumn classes are you as a primary components of the DataTable class.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The DataRow and DataColumn classes are indeed primary components of the DataTable class. These classes are used to represent the rows and columns of data within a DataTable object. The DataRow class represents a single row of data, while the DataColumn class represents a single column of data. Together, these classes allow for the storage and manipulation of tabular data within the DataTable class. Therefore, the statement "The DataRow and DataColumn classes are you as primary components of the DataTable class" is true.Rate this question:
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- 22.
The DataRelation objects are used to enter duplicate values in a column of the table.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
DataRelation objects are not used to enter duplicate values in a column of a table. DataRelation objects are used to establish a relationship between two tables in a dataset, allowing for data to be related and retrieved across the tables. They do not have any impact on the ability to enter duplicate values in a column. Therefore, the statement is false.Rate this question:
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- 23.
The DataRelation objects are used to enforce referential integrity.
- A.
True
- B.
Fasle
Correct Answer
A. TrueExplanation
DataRelation objects are used to establish a relationship between two DataTable objects in a DataSet. This relationship can enforce referential integrity, which means that it ensures that the values in the foreign key column of a child table match the values in the primary key column of the parent table. By enforcing referential integrity, the DataRelation objects help maintain the consistency and accuracy of the data in the database. Therefore, the given statement is true.Rate this question:
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- 24.
The DataTableReader object is used to return the records of a table in editable mode.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The DataTableReader object is used to return the records of a table in a read-only mode, not in editable mode. Therefore, the correct answer is False.Rate this question:
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- 25.
This property specifies or retrieves the table name.
- A.
RowDelete
- B.
TableNewRow
- C.
Clear()
- D.
TableName
- E.
DataSet
Correct Answer
E. DataSetExplanation
The given correct answer for this question is "DataSet". The DataSet is a class in the .NET framework that represents an in-memory cache of data, including tables, relationships, and constraints. It can hold multiple tables, each with its own name. Therefore, the DataSet property "TableName" can be used to specify or retrieve the name of a particular table within the DataSet.Rate this question:
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- 26.
//Custom ControlCustom controls allow you to create reusable controls.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Custom controls are designed to be reusable, meaning they can be used multiple times throughout an application or even in different applications. By creating custom controls, developers can encapsulate complex functionality into a single control, making it easier to maintain and reuse code. This can save time and effort in development as well as improve the overall quality and consistency of the application. Therefore, the statement "Custom controls allow you to create reusable controls" is true.Rate this question:
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- 27.
A composite control allows you to create a control by inheriting from any standard control.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
A composite control does not allow you to create a control by inheriting from any standard control. Instead, it allows you to create a control by combining multiple existing controls together to create a new custom control. Therefore, the statement is false.Rate this question:
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- 28.
User-Defined validation allows you to define the type of validation the user can perform.
- A.
True
- B.
Fasle
Correct Answer
A. TrueExplanation
User-Defined validation allows users to define the type of validation they can perform. This means that users have the flexibility to customize and specify the validation rules according to their specific requirements. They can define the validation criteria, such as data format, range, or any other conditions, that need to be met for the input to be considered valid. This feature empowers users to tailor the validation process to suit their needs, enhancing the overall flexibility and usability of the system.Rate this question:
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- 29.
Customize design allows you to specify the appearance of standard controls on the custom
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because the "customize design" feature allows users to define the visual aspects of standard controls on a custom interface. This means that users have the ability to modify the appearance, such as colors, fonts, sizes, and layouts, of the standard controls according to their preferences or branding requirements.Rate this question:
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- 30.
An extended control allows you to create a control by inheriting from the control class.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
An extended control does not allow you to create a control by inheriting from the control class. This statement is false because an extended control is created by extending or inheriting from an existing control, not the control class itself.Rate this question:
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- 31.
This property retrieves a collection of controls in the specified control.
- A.
Enable
- B.
OnPaint
- C.
Invalidate
- D.
Parent
- E.
Controls
Correct Answer
E. ControlsExplanation
The property "Controls" is the correct answer because it retrieves a collection of controls in the specified control. This means that by accessing this property, we can obtain a collection of all the controls that are contained within a specific control. This can be useful when we need to perform operations or manipulate the controls within a container control.Rate this question:
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- 32.
This property specifies or retrieves the parent container associated with control.
- A.
Enable
- B.
OnPaint
- C.
Invalidate
- D.
Parent
- E.
Controls
Correct Answer
D. ParentExplanation
This property refers to the parent container that is associated with the control. It allows the control to be placed within a larger container, such as a panel or a form. The parent container provides the control with a context and determines its position and behavior within the overall user interface. By accessing this property, developers can manipulate the control's relationship with its parent container and perform actions or retrieve information related to it.Rate this question:
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- 33.
This property checks whether the control responds to user interaction
- A.
Controls
- B.
Parent
- C.
Invalidate
- D.
OnPaint
- E.
Enable
Correct Answer
E. EnableExplanation
The property "Enable" checks whether the control responds to user interaction. It determines if the control is enabled or disabled, meaning if it can be interacted with or not.Rate this question:
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- 34.
This method send a paint message to the control
- A.
Controls
- B.
Parent
- C.
Invalidate
- D.
OnPaint
- E.
Enable
Correct Answer
C. InvalidateExplanation
The correct answer is "Invalidate" because this method is used to send a paint message to the control. When a control is invalidated, it is marked as needing to be repainted, and the operating system will send a paint message to the control, triggering the OnPaint event. This allows the control to update its appearance and display any changes that may have occurred.Rate this question:
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- 35.
This method triggers the Paint event
- A.
Enable
- B.
Invalidate
- C.
Controls
- D.
OnPaint
- E.
Parent
Correct Answer
D. OnPaintExplanation
This method, OnPaint, triggers the Paint event.Rate this question:
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- 36.
Can you arrange the steps for inheriting the windows forms existing controls in correct order?1. From the Project menu, select Add User Control.2. Double - click Inherited User Control3. Include the required properties and methods4. Override the Onpaint() method.5. Modify the name of the base class.
- A.
1-3-4-5-2
- B.
1-2-4-5-3
- C.
1-2--5-3-4
Correct Answer
C. 1-2--5-3-4Explanation
To inherit the Windows Forms existing controls, the correct order of steps is as follows:
1. From the Project menu, select Add User Control.
2. Double-click Inherited User Control.
3. Modify the name of the base class.
4. Include the required properties and methods.
5. Override the Onpaint() method.
First, we need to add a new user control by selecting "Add User Control" from the Project menu. Then, we double-click on the newly added user control to open it. After that, we modify the name of the base class to specify the control we want to inherit from. Next, we include any additional properties and methods that we need for our inherited control. Finally, we override the Onpaint() method to customize the painting behavior of our control.Rate this question:
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- 37.
Customer controls are added by right-clicking the toolbox and clicking the .Net Framework components option.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The correct answer is False. Customer controls are not added by right-clicking the toolbox and clicking the .Net Framework components option. This statement is incorrect as it does not accurately describe the process of adding customer controls.Rate this question:
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- 38.
Windows form existing controls cannot be inherited in your application
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
This statement is false. Windows form existing controls can be inherited in your application. Inheritance allows you to create a new class that inherits the properties, methods, and events of an existing control. This allows you to customize and extend the functionality of the control to suit your specific needs. By inheriting from an existing control, you can reuse code and avoid duplicating functionality.Rate this question:
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- 39.
The ToolboxBitmapAttribute class is used to specify a particular image for the custom control.
- A.
True
- B.
Fasle
Correct Answer
A. TrueExplanation
The statement is true because the ToolboxBitmapAttribute class is indeed used to specify a particular image for a custom control. This attribute allows developers to associate an image with a custom control, which will then be displayed in the toolbox when the control is selected. This can help users easily identify and differentiate between different controls in the toolbox, making it a useful feature for custom control development.Rate this question:
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- 40.
Toolbox bitmap is specified by adding ToolboxBitmapAttribute bellow the class declaration of the custom control.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The explanation for the answer being False is that the Toolbox bitmap is not specified by adding the ToolboxBitmapAttribute below the class declaration of the custom control. The Toolbox bitmap is actually specified by adding the ToolboxBitmap attribute to the custom control's designer class.Rate this question:
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- 41.
Custom control are programmatically used in your application by using the namspace in which the control is create.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Custom controls are created within a specific namespace in an application and can be used programmatically. This means that developers can use the custom control in their code by referencing the namespace in which the control is created. Therefore, the statement "Custom control are programmatically used in your application by using the namespace in which the control is create" is true.Rate this question:
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- 42.
Composite control are used for creating custom graphical interfaces.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Composite controls are indeed used for creating custom graphical interfaces. A composite control is a combination of multiple controls or elements that are grouped together to create a new control with its own unique functionality. These controls are often used when the standard controls provided by a programming framework or library are not sufficient to meet the requirements of a specific user interface design. By combining and customizing different controls, developers can create complex and specialized graphical interfaces tailored to their specific needs. Therefore, the statement that composite controls are used for creating custom graphical interfaces is true.Rate this question:
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- 43.
Composite controls are created only as a part of the windows application project
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Composite controls can be created as a part of any project, not just windows application projects. They are reusable controls that combine multiple existing controls into a single control. These controls can be used in various types of projects, including web applications, mobile applications, and even console applications. Therefore, the given statement is false.Rate this question:
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- 44.
Composite controls are reused across multiple application.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Composite controls are reusable controls that can be used in multiple applications. This means that instead of creating the same control from scratch for each application, the composite control can be used as a template and easily integrated into different applications. This allows for consistency and efficiency in development, as well as easier maintenance and updates. Therefore, the statement that composite controls are reused across multiple applications is true.Rate this question:
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- 45.
Composite controls contain only one windows forms control in a container.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
A composite control is a custom control that is made up of multiple windows forms controls grouped together in a container. Therefore, the statement that composite controls contain only one windows forms control in a container is incorrect. Composite controls can have multiple controls within them, allowing for more complex and customizable user interfaces.Rate this question:
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- 46.
Composite controls cannot be inherited from other controls.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Composite controls can be inherited from other controls. In object-oriented programming, inheritance allows a class to inherit properties and behaviors from another class. This means that a composite control, which is a control that contains other controls, can inherit from a base control class. By inheriting from another control, the composite control can access and utilize the properties and behaviors defined in the base control class, making it possible to create more complex and specialized controls by building upon existing controls. Therefore, the statement "Composite controls cannot be inherited from other controls" is false.Rate this question:
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- 47.
Provides options for designing and sorting the database.
- A.
Reusability
- B.
Security
- C.
Data Designing and Formatting
- D.
Data Access
- E.
Viewing Report
Correct Answer
C. Data Designing and FormattingExplanation
The given answer, "Data Designing and Formatting," is the correct option because it aligns with the statement that the provided options are for designing and sorting the database. Data designing refers to the process of creating a database schema and defining the structure of tables, while data formatting involves organizing and presenting data in a desired format. Both these tasks are essential for designing and sorting a database effectively.Rate this question:
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- 48.
Facilitates access of the databases by using more than 35 data drivers
- A.
Reusability
- B.
Security
- C.
Data Designing and Formatting
- D.
Data Access
- E.
Viewing Report
Correct Answer
D. Data AccessExplanation
The correct answer is Data Access because it states that the given feature facilitates access to the databases by using more than 35 data drivers. This implies that the feature allows users to easily retrieve and manipulate data from various databases, enhancing their ability to access and work with data effectively.Rate this question:
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- 49.
Stores all objects used in a report in a centralized library for easy access.
- A.
Reusability
- B.
Security
- C.
Data Designing and Formatting
- D.
Data Access
- E.
Viewing Report
Correct Answer
A. ReusabilityExplanation
This answer is correct because storing all objects used in a report in a centralized library allows for easy access and reuse of these objects in future reports. This promotes efficiency and consistency in report creation, as objects can be easily accessed and reused instead of recreating them from scratch.Rate this question:
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- 50.
Allows the user to preview the report before generating it
- A.
Reusability
- B.
Security
- C.
Data Designing and Formatting
- D.
Data Access
- E.
Viewing Report
Correct Answer
E. Viewing ReportExplanation
The correct answer is "Viewing Report" because it allows the user to preview the report before generating it. This functionality is important as it enables the user to check the accuracy and formatting of the report before finalizing it. By providing a preview option, the user can make any necessary adjustments or corrections to the report, ensuring that the final generated version is accurate and meets their requirements.Rate this question:
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