The Repeater control allows developers to create ________ HTML or other markup for each item in a dataset.

  • Conditional
  • Custom
  • Dynamic
  • Static
The Repeater control in ADO.NET allows developers to dynamically generate HTML or other markup for each item in a dataset. This means that the markup can be generated based on the data retrieved from the dataset, providing flexibility in the presentation of the data.

In ADO.NET, the ___________ property of a command object specifies the maximum amount of time a command can run before being terminated.

  • CommandTimeout
  • CommandDuration
  • TimeoutDuration
  • ExecutionTimeLimit
The correct option is CommandTimeout. In ADO.NET, the CommandTimeout property of a command object allows you to specify the maximum amount of time (in seconds) that a command can execute before it is terminated. This property is useful in scenarios where you want to control the execution time of commands, preventing long-running queries from affecting application performance or causing timeouts.

How can you configure the size of the connection pool in ADO.NET?

  • By adjusting system registry settings, By modifying the database configuration, By increasing the number of available ports, By setting the "Max Pool Size" property in the connection string
  • By adjusting system registry settings, By modifying the database configuration, By increasing the number of available ports, By setting the "Min Pool Size" property in the connection string
  • By setting the "Max Pool Size" property in the connection string, By adjusting system registry settings, By modifying the database configuration, By increasing the number of available ports
  • By setting the "Min Pool Size" property in the connection string, By adjusting system registry settings, By modifying the database configuration, By increasing the number of available ports
The size of the connection pool in ADO.NET can be configured by setting the "Max Pool Size" property in the connection string, specifying the maximum number of connections allowed in the pool.

To optimize LINQ to Entities queries, consider using the ___________ method to specify what data to include in the result set.

  • FirstOrDefault()
  • Include()
  • Skip()
  • ToList()
The correct answer is Include(). The Include() method is used to specify related entities to include in the query result set. This can help optimize LINQ to Entities queries by fetching related data in a single round trip to the database, reducing the number of subsequent database calls for related data.

In LINQ to SQL, how can you retrieve a single record based on specific criteria?

  • ExecuteQuery method
  • ExecuteScalar method
  • FirstOrDefault method
  • Single method
When using LINQ to SQL, the FirstOrDefault method is used to retrieve a single record based on specific criteria. This method returns the first element of a sequence that satisfies a specified condition or a default value if no such element is found.

You have a LINQ query that performs multiple joins and retrieves a large dataset. What steps can you take to optimize the query's performance?

  • Filtering Data
  • Paging Results
  • Proper Indexing
  • Using IQueryable instead of IEnumerable
Proper Indexing: Indexing plays a crucial role in optimizing query performance, especially in scenarios involving multiple joins and large datasets. By ensuring that appropriate indexes are created on the columns used in joins and filtering conditions, you can significantly enhance query execution speed by allowing the database engine to quickly locate the required data. This optimization reduces the need for full table scans and improves overall query efficiency.

What is the process of defining how entities in ADO.NET Entity Framework map to database tables called?

  • Database Synchronization
  • Entity Framework Design
  • Entity Mapping
  • Object-Relational Mapping (ORM)
Object-Relational Mapping (ORM)

Custom data providers can be developed to support ___________ databases in ADO.NET.

  • MongoDB
  • NoSQL
  • Relational
  • SQL
ADO.NET allows developers to create custom data providers to support various databases, including NoSQL databases like MongoDB. Custom providers can extend ADO.NET's functionality to work with different data storage systems.

The Entity Framework ___________ feature allows you to specify how entity classes are mapped to database tables.

  • Code-First
  • Code-Last
  • Code-Only
  • Code-Middle
The correct option is "Code-First." Code-First is a feature of Entity Framework that allows developers to define the domain model classes first, and then generate the database schema based on those classes. This approach provides flexibility and control over the database design while working primarily with object-oriented code.

What are some techniques for enhancing the performance of Repeater and DataList controls when dealing with large datasets?

  • Enabling ViewState to persist control state across postbacks.
  • Implementing paging to retrieve and display a subset of data at a time.
  • Setting the DataList control's RepeatLayout property to Table to optimize rendering performance.
  • Using nested controls within Repeater and DataList controls to reduce the number of iterations over the dataset.
One technique for improving performance with large datasets is to implement paging, which involves retrieving and displaying a subset of data at a time. This approach reduces the amount of data transferred between the server and client, leading to faster page load times and improved responsiveness. Additionally, using efficient data retrieval methods such as stored procedures or indexed queries can help minimize database load and improve overall performance. Caching frequently accessed data and optimizing data binding operations can also contribute to better performance when working with Repeater and DataList controls.