In ADO.NET, you can execute a stored procedure using the ___________ method of the SqlCommand object.
- Execute
- ExecuteNonQuery
- ExecuteReader
- ExecuteScalar
In ADO.NET, you can execute a stored procedure using the ExecuteNonQuery method of the SqlCommand object. ExecuteNonQuery is typically used for executing commands that do not return any result set, such as INSERT, UPDATE, DELETE, or for executing stored procedures that do not return result sets.
When working with DataViews, what is the significance of the Sort property?
- The Sort property defines the sorting algorithm used by the DataView.
- The Sort property indicates whether the DataView allows sorting operations.
- The Sort property is used to sort the DataView's columns in ascending or descending order.
- The Sort property specifies the order in which the data rows are displayed in the DataView.
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.
Which LINQ technology is more suitable for querying in-memory data structures like lists and arrays?
- LINQ to DataSet
- LINQ to Objects
- LINQ to SQL
- LINQ to XML
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.
In ADO.NET, how can you monitor and manage the connection pool effectively?
- Adjusting connection string parameters
- Implementing connection leasing
- Implementing custom connection pooling
- Using performance counters
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.
You are developing an application using Entity Framework, and you want to define the data model using C# classes. Which approach would you choose?
- Code-First
- Database-First
- Designer-First
- Model-First
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.
You are working with a SqlDataReader to fetch data from a SELECT statement. What should you consider when iterating through the result set?
- Check for null values
- Close the connection after iteration
- Read data in sequential order
- Use asynchronous methods
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.
When using data binding in WinForms, what is the role of the BindingSource component?
- Acts as a bridge between the data source and controls, facilitating synchronization
- Handles user interactions with the UI controls
- Manages connections to the database and executes SQL queries
- Provides visual representation of the data in a grid view
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.
Data binding can simplify UI development by automatically synchronizing ___________ and data source.
- UI controls
- UI elements
- User interface
- Presentation components
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.
What is the significance of setting the Nested property of a DataRelation to true?
- It allows for multiple levels of nesting within the dataset
- It automatically updates the parent-child relationship when data changes
- It enables the creation of a nested XML structure when serializing the dataset
- It ensures that the child rows are sorted alphabetically
Setting the Nested property of a DataRelation to true enables the creation of multiple levels of nesting within the dataset. This is useful when dealing with complex hierarchical data structures.
How can you handle exceptions when executing non-query commands in ADO.NET?
- Using arrays
- Using conditional statements
- Using loops
- Using try-catch blocks
Exception handling in ADO.NET involves using try-catch blocks to capture and handle any exceptions that might occur during the execution of non-query commands. This ensures robust error management in database operations.