The correct option is Observer pattern. In this scenario, where real-time updates are needed in the UI, the Observer pattern would be suitable. The Observer pattern allows objects to subscribe to changes in other objects and receive notifications when those changes occur. This enables real-time updates in the UI whenever changes happen in the database, ensuring synchronization between the database and the UI. Two-way data binding allows updates from UI to data source and vice versa, but it might not provide real-time updates. One-way data binding only updates the UI from the data source, and Three-way data binding is not a standard concept in ADO.NET.

In ADO.NET, the methods Open() and Dispose() are used to respectively establish and release connections. The Open() method opens a connection to a data source, while the Dispose() method releases the resources used by the connection.

The DataGrid control in ADO.NET is primarily used for displaying data in a tabular format. It allows users to view data retrieved from a data source, such as a database, in a structured grid layout. This makes it easier for users to visualize and interact with the data.

In Entity Framework, a DbSet represents a collection-like object that corresponds to a table in the database. It allows developers to query and manipulate data in that table using LINQ queries and methods provided by Entity Framework. Each DbSet property in a DbContext represents a specific entity type and corresponds to a table in the underlying database.

Table

The correct option is UI controls. Data binding automatically synchronizes the data displayed by UI controls with data stored in a data source, such as a database or a collection. By binding UI controls directly to data sources, developers can simplify UI development and ensure that the user interface reflects changes in the underlying data automatically.

The BindingSource component acts as a bridge between the data source (such as a dataset or data table) and the controls on a form. It facilitates synchronization of data between the controls and the underlying data source, making it easier to manage and manipulate data in WinForms applications.

The correct option is Read data in sequential order. When working with a SqlDataReader, it's essential to iterate through the result set in a sequential manner using methods like Read(). This allows you to retrieve each row of data one at a time, which is efficient for processing large result sets without loading the entire data into memory at once.

Code-First is the preferred approach when defining the data model using C# classes in Entity Framework. With Code-First, you write the C# classes first, and the database schema is generated based on these classes. This approach provides more flexibility and control over the database schema and allows for easy migrations and version control.

In ADO.NET, monitoring and managing the connection pool effectively involves utilizing performance counters to track metrics such as the number of connections in use, the rate of connections being opened and closed, and the maximum pool size. These counters help in identifying any potential bottlenecks or performance issues related to connection pooling.

LINQ to Objects is specifically designed for querying in-memory data structures such as lists, arrays, and other collections. It allows developers to use LINQ query expressions to manipulate and retrieve data from these data structures efficiently.

The Sort property of a DataView is significant as it specifies the order in which the data rows are displayed. This property allows you to sort the DataView's rows based on the values of one or more columns, either in ascending or descending order, providing control over the presentation of data.