In your ASP.NET application, you want to display a list of products from a database and allow users to edit them. What type of data binding would be suitable for this scenario, and why?

  • Two-way data binding
  • Data binding with LINQ to SQL
  • Data binding with DataReader
  • Data binding with DataList control
Two-way data binding would be suitable for this scenario. This type of data binding allows changes made in the UI to automatically update the underlying data source, and vice versa. In an ASP.NET application, this means users can edit the product list directly in the UI, and those changes will be reflected back to the database. Two-way data binding simplifies the development process and improves user experience by ensuring seamless interaction between the UI and the data source. The other options either lack support for bidirectional data flow or involve more complex implementations.

Your application requires efficient loading of related data when querying a database using LINQ to Entities. Which method or approach would you employ to achieve this?

  • Eager Loading
  • Lazy Loading
  • Explicit Loading
  • Deferred Loading
The correct option is "Eager Loading." In this approach, related data is loaded along with the primary entities, reducing subsequent database trips and enhancing performance in querying related data.

What is the key difference between a data provider and an ADO.NET managed provider?

  • The connection pooling mechanism
  • The data source supported
  • The database type supported
  • The method of data access
A data provider in .NET is responsible for interacting with a specific data source, such as SQL Server or Oracle, while an ADO.NET managed provider is responsible for managing the connection and communication between the .NET application and the underlying database. The key difference lies in the handling of the data source, with the data provider focusing on data access and the managed provider focusing on managing the connection and communication.

The RowFilter property in a DataView is typically used to apply ___________ to the data.

  • Aggregation
  • Constraints
  • Filtering
  • Sorting
The RowFilter property in a DataView is used to apply filtering criteria to the data, allowing you to display only the rows that meet specific conditions. It helps in refining the view of data according to the user's needs.

ADO.NET Entity Framework is an Object-Relational Mapping (ORM) tool that helps in bridging the gap between ___________ and ___________.

  • Application Layer and Database Layer
  • Business Logic and Presentation Layer
  • C# and SQL
  • Object-Oriented Programming (OOP) and Database Management Systems (DBMS)
ADO.NET Entity Framework bridges the gap between Object-Oriented Programming (OOP) and Database Management Systems (DBMS). It allows developers to work with relational data using domain-specific objects, thus enhancing productivity and reducing development time by abstracting the complexity of database interaction.

In ADO.NET, what is the role of a DataTable within a dataset?

  • Acts as a connection manager
  • Holds data retrieved from a data source
  • Represents a single table of data in memory
  • Stores metadata about the data structure
A DataTable within a dataset serves as an in-memory representation of a single table retrieved from a data source. It holds the actual data rows along with metadata such as column names, data types, and constraints. This allows for disconnected access to data, enabling offline manipulation and processing.

In the context of DropDownList controls, what is the purpose of the DataTextField property?

  • Defines the field that will be used to identify each item in the DropDownList
  • Determines the field that will be used to populate the DropDownList with data
  • Sets the text color of the items in the DropDownList
  • Specifies the connection string to the database
The DataTextField property of a DropDownList control is used to specify the field from the data source that will be used to populate the control with data. This property helps determine which data field will be displayed as the text for each item in the DropDownList. It's crucial for ensuring that the DropDownList accurately reflects the data retrieved from the database or another data source.

Resource management in ADO.NET includes handling of connections, ___________, and other database-related resources.

  • Indexes
  • Queries
  • Transactions
  • Views
In addition to managing connections, ADO.NET also involves handling transactions, which are sets of operations that are treated as a single unit of work. Proper transaction management ensures data integrity and consistency in the database.

In Windows Forms, the ___________ event is commonly used to update the user interface after data changes.

  • DataChanged
  • DataUpdated
  • DataSourceChanged
  • DataBindingComplete
The correct option is DataBindingComplete. This event is commonly used in Windows Forms applications to update the user interface after data changes. It occurs after a data-binding operation has finished, allowing developers to perform additional tasks or updates to the user interface based on changes to the data source.

In ADO.NET, what is the purpose of the Connection Pooling feature?

  • To automatically update database schemas
  • To improve security by encrypting database connections
  • To manage the connections between a .NET application and a database
  • To optimize network bandwidth usage
Connection Pooling in ADO.NET is used to efficiently manage database connections between a .NET application and a database server. It helps in reusing existing connections, thus reducing the overhead of opening and closing connections frequently. This improves application performance and scalability by minimizing the time spent on establishing new connections.