How does Entity Framework handle output parameters from stored procedures?
- It converts output parameters to return values
- It ignores output parameters
- It maps output parameters to properties of an object
- It throws an error
Entity Framework allows output parameters from stored procedures to be mapped to properties of objects retrieved from the database. This enables developers to easily access data returned by stored procedures.
When would you use a stored procedure over LINQ queries in Entity Framework?
- When dealing with complex business logic or performance optimization
- When the data manipulation requires simple CRUD operations
- When the database schema is subject to frequent changes
- When working with in-memory collections
Stored procedures are typically used over LINQ queries in Entity Framework when dealing with complex business logic or when performance optimization is crucial. While LINQ queries are powerful for querying data in a more expressive and object-oriented manner, stored procedures offer performance benefits and can encapsulate complex logic directly in the database, making them more suitable for scenarios where performance or complex logic are primary concerns.
What is required to import a function from a database into your Entity Framework model?
- Adding the function manually in the code
- Using the AddFromFunctions method
- Using the Database.ExecuteSqlCommand method
- Using the ImportFunction attribute
To import a function from a database into your Entity Framework model, you typically use the ImportFunction attribute. This attribute allows you to specify the name of the function in the database that you want to import into your Entity Framework model. By decorating a method in your code with this attribute and providing the name of the function, Entity Framework will automatically map calls to that method to the corresponding database function, providing seamless integration between your code and the database functions.
How do you map a stored procedure to a domain model in Entity Framework?
- Using the AddFromStoredProcedures method
- Using the Database.ExecuteSqlCommand method
- Using the ImportFunction attribute
- Using the MapToStoredProcedures method
Mapping a stored procedure to a domain model in Entity Framework is typically done using the MapToStoredProcedures method. This method is used to configure Entity Framework to map CRUD operations to specific stored procedures defined in the database, allowing for seamless integration of stored procedures with the domain model. This approach enables developers to leverage the power and efficiency of stored procedures while still working within the Entity Framework framework.
When integrating user-defined functions in SQL Server with Entity Framework, use the ________ attribute in your code.
- DbFunction
- Function Import
- Function Mapping
- User-Defined Function Mapping
When integrating user-defined functions (UDFs) in SQL Server with Entity Framework, it's essential to use the DbFunction attribute in your code. This attribute allows Entity Framework to map .NET methods to SQL functions, enabling seamless integration and invocation of user-defined functions within LINQ queries or method calls. Function Mapping typically refers to mapping database functions to conceptual model functions, Function Import is used for importing stored procedures and user-defined functions, and User-Defined Function Mapping is not a standard term in Entity Framework.
To handle multiple result sets from a stored procedure, ________ is a common approach in Entity Framework.
- Complex Types
- Entity Splitting
- Lazy Loading
- Multiple Result Sets
Entity Framework commonly utilizes Multiple Result Sets to handle scenarios where a stored procedure returns more than one result set. This approach allows Entity Framework to map each result set to appropriate entities or complex types, enabling efficient processing of data returned by the stored procedure. Entity Splitting refers to mapping a single table to multiple entities, Complex Types are used to represent structured data, and Lazy Loading is a technique for deferred loading of related entities.
In a scenario where a stored procedure modifies the database state, Entity Framework uses ________ to track changes.
- Change Detection
- Change Tracking
- Data Annotations
- Transaction Handling
Entity Framework employs Change Detection to monitor changes made by stored procedures in the database. When a stored procedure modifies the database state, Entity Framework automatically detects these changes to ensure consistency between the application's data model and the database. Change Tracking refers to tracking changes made to entities within the application. Transaction Handling deals with managing database transactions, and Data Annotations are used for defining metadata about entity properties.
To map a function to a complex type, define a ________ in the Entity Framework model.
- ComplexType
- DbSet
- EntityType
- FunctionImport
In Entity Framework, to map a function to a complex type, you need to define a ComplexType in the model. Complex types represent types in the conceptual model that do not have keys and are not mapped to tables in the database. FunctionImport is used to import stored procedures and user-defined functions into the conceptual model, DbSet is a property that represents a table in the database, and EntityType represents an entity type in the conceptual model.
For non-entity-returning stored procedures, Entity Framework utilizes the ________ method.
- ExecuteFunction
- ExecuteNonQuery
- ExecuteResultSet
- ExecuteScalar
Entity Framework utilizes the ExecuteFunction method for non-entity-returning stored procedures. This method is used to execute stored procedures that don't return entities but may perform other operations like data manipulation or retrieval. ExecuteNonQuery is generally used for executing SQL commands that don't return any data, ExecuteScalar is used when the stored procedure returns a single value, and ExecuteResultSet is used for procedures returning entity data.
To execute a stored procedure that returns a set of entities, use the ________ method in Entity Framework.
- ExecuteFunction
- ExecuteNonQuery
- ExecuteResultSet
- ExecuteSqlCommand
In Entity Framework, to execute a stored procedure that returns a set of entities, the appropriate method to use is ExecuteResultSet. This method is specifically designed for executing stored procedures that return entity data. ExecuteSqlCommand is used for executing SQL commands directly, ExecuteFunction is used for non-entity-returning stored procedures, and ExecuteNonQuery is typically used for executing SQL commands that don't return any data.
How does Entity Framework integrate with complex database functions that involve multiple tables and complex logic?
- It directly invokes stored procedures for complex logic
- It generates raw SQL queries for complex logic
- It relies on entity navigation properties to traverse relationships and retrieve related data from multiple tables
- It utilizes LINQ queries to represent complex logic
Entity Framework integrates with complex database functions by leveraging entity navigation properties to traverse relationships and retrieve related data from multiple tables, simplifying complex logic.
How does Entity Framework handle asynchronous transactions?
- By caching transactions for later execution
- By executing transactions sequentially
- By ignoring transactions and directly manipulating the database
- By utilizing asynchronous methods for database operations
Entity Framework handles asynchronous transactions by providing asynchronous methods for database operations. This allows for non-blocking execution, improving performance and scalability.