The use of stored procedures can help improve ___________ and security in database applications.
- Efficiency
- Performance
- Reliability
- Scalability
The use of stored procedures can help improve performance and security in database applications. By precompiling SQL statements, stored procedures reduce the overhead of repeated compilation, leading to better performance. Furthermore, they enhance security by allowing controlled access to database objects and minimizing the risk of SQL injection attacks.
In DataGrid or DataGridView controls, you can enable data editing by setting the "___________" property.
- AllowEdit
- EditEnabled
- EditMode
- Editable
In DataGrid or DataGridView controls, you can enable data editing by setting the "EditMode" property to allow users to edit the data displayed in the control.
To optimize LINQ queries for performance, you can use the ___________ method to reduce the number of database calls.
- Aggregate
- AsQueryable
- Join
- Select
To optimize LINQ queries for performance, you can use the AsQueryable method to reduce the number of database calls. This method converts an IEnumerable collection to an IQueryable collection, allowing the query to be executed on the database server instead of in-memory. This can lead to significant performance improvements, especially when dealing with large datasets or complex queries.
To improve LINQ query performance, you can use the DataLoadOptions class to specify ___________ loading.
- Eager
- Lazy
- Deferred
- Immediate
Eager loading retrieves all related data at once, which can enhance performance by reducing the number of database calls. This is done using the LoadWith method of DataLoadOptions.
When executing an INSERT command, you can use ___________ to specify the values to be inserted.
- INTO clause
- SELECT clause
- VALUES clause
- WHERE clause
In an INSERT command in SQL, the VALUES clause is used to specify the values to be inserted into the specified columns of a table. It allows you to define the data that will be added to the table.
How can you customize the appearance of cells in a DataGrid or DataGridView?
- By adjusting the Padding property
- By changing the TextAlign property
- By handling the CellFormatting event
- By setting the AutoSizeColumnsMode property
You can customize the appearance of cells in a DataGrid or DataGridView control by handling the "CellFormatting" event. This event allows you to specify custom formatting for individual cells based on criteria such as their values or positions. By handling this event, you can modify various aspects of cell appearance, including font style, background color, and content alignment.
In LINQ to DataSet, which method is used to sort the result set in ascending order based on a specified column?
- Ascending()
- OrderBy()
- Sort()
- SortBy()
The correct method to sort the result set in ascending order based on a specified column in LINQ to DataSet is OrderBy(). This method sorts the elements of a sequence in ascending order according to a key. It allows you to specify the column based on which you want to sort the data.
When working with disconnected data in ADO.NET, what is the purpose of the RowVersion column in a DataTable?
- It stores the foreign key references for related rows.
- It stores the index of each row in the DataTable.
- It stores the primary key of each row.
- It stores the timestamp indicating when the row was last updated.
In ADO.NET, the RowVersion column, also known as the Timestamp column, is used to track changes to rows in a DataTable when working with disconnected data. It stores a value that represents the timestamp of when the row was last updated. This is crucial for concurrency management, allowing ADO.NET to detect whether any changes have been made to a row since it was last retrieved from the database.
Which LINQ operator is used for grouping elements based on a common attribute or key?
- GroupBy
- OrderBy
- Select
- Where
The GroupBy operator in LINQ is used to group elements from a data source based on a common attribute or key. It creates groups of elements that share the same value for the specified attribute, allowing for easy aggregation or further analysis of the data. GroupBy is particularly useful when working with datasets that need to be organized into logical groups for processing.
In data binding, the ___________ control is responsible for displaying data to the user.
- TextBox
- ListBox
- DataGridView
- DataGrid
The correct option is TextBox. In ADO.NET, data binding is a mechanism for synchronizing the data in your application's data sources with its user interface controls. TextBox controls are commonly used to display data to the user in Windows Forms applications, making them responsible for displaying data to the user in the context of data binding.